IS-IS Commands

Use this command to set the authentication password for the Level-1 area and to set authentication on Level-1 sequence number PDUs. This command enables authentication when receiving and sending link-state and sequence number PDUs in Level-1 areas. The password must be the same for all the ISIS routers in the same area.

Use the no parameter with this command to clear the area password.

Command Syntax

area-password WORD

area-password WORD authenticate snp (send-only|validate)

no area-password

Parameters

WORD

Password string.

authenticate

Insert the password into Level-1 SNP PDUs.

snp

Sequence number PDUs.

send-only

Only insert the password into the Level-1 sequence number PDUs, but not check the password in sequence number PDUs that it receives. Use this keyword during a software upgrade to ease the transition.

validate

Insert the password into Level-1 sequence number PDUs and check the password in sequence number PDUs that it receives.

Default

By default, the area password is not configured

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

(config)#router isis bb

(config-router)#area-password mypasswd

(config)#router isis bb

(config-router)#area-password myPass authenticate snp send-only

(config)#router isis bb

(config-router)#no area-password

authentication key-chain

Use this command to set the key chain to be used for authentication at the instance level. Authentication mode must be set to md5 to configure the key chain. If no key chain is configured with the key-chain command, no key-chain authentication is performed.

Only one authentication key-chain is applied to an ISIS interface at a time. That is, issuing a second isis authentication key-chain command overrides the first isis authentication key-chain command. If neither the level-1 nor the level-2 keyword is configured, the chain applies to both levels. Authentication can be specified for an individual ISIS interface using the isis authentication key-chain command.

Use the no parameter with this command to unset the key chain used for authentication.

Command Syntax

authentication key-chain WORD (level-1|level-2|)

no authentication key-chain (level-1|level-2|)

Parameters

WORD

Specify the chain name (valid authentication keys).

level-1

Specify an authentication key-chain for level-1 PDUs.

level-2

Specify an authentication key-chain for level-2 PDUs.

Default

The key chain applies to the level(s) on which authentication mode is configured as MD5 if no level is specified.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#router isis 1

(config-router)#authentication key-chain myKey level-1

authentication mode

Use this command to set the authentication mode at the instance level.

If clear-text authentication was configured using the area-password or domain password commands, the authentication mode command overrides both of those commands (based on the level at which MD5 is configured). If the authentication mode command was used first, and subsequently an attempt is made to use the area-password or domain password commands, the attempt fails. To configure clear-text authentication using the area-password or domain password commands, first use the no authentication mode command.

The type of authentication and the level to which it applies can be specified for a single ISIS interface, rather than per ISIS instance, using the isis authentication mode command.

Use the no parameter with this command to unset the authentication mode.

Command Syntax

authentication mode {md5|text} (level-1|level-2|)

no authentication mode {md5|text} (level-1|level-2|)

Parameters

md5

Keyed message digest

text

Text mode

level-1

Specify an authentication key-chain for level-1 PDUs.

level-2

Specify an authentication key-chain for level-2 PDUs.

Default

The authentication mode is set to MD5 for both levels if no level is specified.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis 1

(config-router)#authentication mode md5 level-1

(config-router)#no authentication mode md5 level-1

authentication send-only

Use this command to set the send-only option at the instance level.

Use this command before configuring the authentication mode and authentication key-chain, so that the implementation of authentication goes smoothly. That is, the routers will have more time for the keys to be configured on each router if authentication is inserted only on the packets being sent, not checked on packets being received. After all routers that must communicate are configured with this command, enable the authentication mode and key chain on each router. Then, specify the no authentication send-only command to disable the send-only feature.

If the level-1-2 keyword is configured, the send-only feature applies to both levels.

Use the no parameter with this command to unset the send-only option.

Command Syntax

authentication send-only (level-1-only|level-2-only|level-1-2)

no authentication send-only

Parameters

level-1-only

Set send-only option for level-1 only.

level-2-only

Set send-only option for level-2 only.

level-1-2

Set send-only option for level-1-2 only.

Default

By default, authentication send only is disabled

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis 1

(config-router)#authentication send-only level-1-only

(config-router)#no authentication send-only

bfd all-interfaces

Use this command to enable the Bidirectional Forwarding Detection (BFD) feature on the interfaces enabled with this ISIS instance.

This command sets BFD fall-over check for all the neighbors under specified process. To disable BFD checking on particular interface use isis bfd disable command at interface mode.

Use the no parameter with this command to disable BFD functionality for an ISIS instance.

Command Syntax

bfd all-interfaces

no bfd all-interfaces

Parameters

None

Default

By default, the BFD feature is disabled.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

(config)#router isis aa

(config-router)#bfd all-interfaces

(config-router)#no bfd all-interfaces

capability cspf

Use this command to enable the constrained shortest path first (CSPF) feature in the ISIS module. CSPF calculates optimum explicit route (ER), using Traffic Engineering Database and (TED) and pre-existing Label Switched Path (LSP). The resulting ER is used by a signaling protocol (RSVP-TE) to set up LSPs. Use the no parameter with this command to disable CSPF functionality for an ISIS instance.

Command Syntax

capability cspf

no capability cspf

Parameters

None

Default

If this command is not used, the CSPF feature is disabled.

Command Mode

Router mode

Example

(config)#router isis aa

(config-router)#capability cspf

clear clns neighbors

Use this command to clear CLNS neighbor adjacencies.

Command Syntax

clear clns neighbors

Parameters

None

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

>ena

#clear clns neighbors

clear clns is-neighbors

Use this command to clear IS neighbor adjacencies.

Command Syntax

clear clns is-neighbors System-ID

Parameters

System-ID

Neighbor system ID in XXXX.XXXX.XXXX format.

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

>enable

#clear clns is-neighbors 1111.1111.1111.1111

clear ip isis route

Use this command to clear IPv4 routes.

Command Syntax

clear ip isis (WORD|) route (redistribution|all)

Parameters

WORD

Name that identifies the IS-IS area.

redistribution

Clear IS-IS local redistribution routes.

all

Clear all of the IS-IS routing tables.

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

>ena

#clear ip isis route redistribution

clear isis adjacency

This command is used to remove the entries from the IS-IS adjacency database. Clears all adjacencies for the specified routing instance or specified interface or particular system ID.

Command Syntax

clear isis adjacency (*|IFNAME|system-id XXXX.XXXX.XXXX|) (vrf VRFNAME|)

Parameters

Clear all neighbors.

IFNAME

Interface name.

XXXX.XXXX.XXXX

Neighbor System-ID.

VRFNAME

VRF name.

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#clear isis adjacency *

clear isis counter

Use this command to clear system-wide IS-IS counters (IsisSystemCounterEntry in RFC 4444).

Command Syntax

clear isis counter

Parameters

None

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#clear isis counter

clear isis interface counter

Use this command to clear interface counters. If you do not specify a parameter, then counters for all interfaces are cleared.

Command Syntax

clear isis interface counter (IFNAME|)

Parameters

IFNAME

Interface name.

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#clear isis interface counter

clear isis process

Use this command to restart ISIS processes. If you do not specify a parameter, then all ISIS processes are restarted.

Command Syntax

clear isis (WORD|) process

Parameters

WORD

Name that identifies the IS-IS area.

Command Mode

Exec mode and Privileged Exec mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#clear isis process

debug isis

Use this command to turn on debugging for specified criteria. Debug commands enable to show some debugging information about specified criteria into file or terminal.

Use the no parameter to turn off debugging for specified criteria.

Command syntax

debug isis (all|)

no debug isis (all|)

no debug all

no debug all isis

undebug all

undebug isis (all|)

undebug all isis

Parameters

all

Enables all debugging.

authentication

Debugging for authentication.

checksum

Debugging for checksums.

bfd

Debugging for bidirectional forwarding detection.

events

Debugging for internal events.

hello

Debugging for hello processing.

mpls

Debugging for MPLS.

IFNAME

Interface name.

System-ID

System identifier.

cspf

Debugging for CSPF.

events

Events.

hexdump

Hexdump.

ifsm

Debugging for interface finite state machine.

local-updates

Debugging for local updates.

lsp

Debugging for link-state packet.

nfsm

Debugging for neighbor finite state machine.

nsm

Debugging for NSM messages.

pdu

Debugging for protocol data unit.

protocol-errors

Debugging for protocol errors.

rib

Debugging for RIB information.

spf

Debugging for shortest path first route calculation.

Command Mode

Privileged Exec mode and Configure mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#debug isis pdu

#configure terminal

(config)#debug isis nsm

default-information originate

Use this command to originate reachability information to a default route into link-state packets.

There is no default information in a Level-2 domain by default, while a Level-1 router calculates a default to L1L2 route during SPF calculation. This command originates a default route into a Level-2 domain.

Use the no parameter with this command to withdraw reachability information to a default route from link-state packets.

Command Syntax

default-information originate (always| level-1|) (route-map WORD|)

no default-information originate (always| level-1|)

Parameters

originate

Specify to distribute a default route

always

The default route is advertised even if there is no default route in the router’s routing table.

level-1

Distribute in level-1.

route-map

Identifies other filtering options via a route map.

Default

There is no default information in Level-2 domain by default, while Level-1 router calculates default to L1L2 route during SPF calculation. This command enables to originate default route into Level-2 domain. As an added option, if the user wants to originate the default route in L1 LSP, the “level-1” parameter can be used as follows:

default-information originate level-1

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#default-information originate

(config-router)#exit

(config)#exit

distance (IPv4)

Use this command in router mode to set the administrative distance for all IPv4 routes or routes from a specific source.

Use the no parameter with this command to remove an administrative distance.

Command Syntax

distance <1-255> (System-ID (WORD|)|)

no distance (System-ID|)

Parameters

<1-255>

Distance range.

System-ID

Source ID in XXXX.XXXX.XXXX format.

WORD

Access-list name.

Default

By default, all options are turned off.

Command Mode

Router mode

Examples

The following example shows setting the administrative distance for all routes.

#configure terminal

(config)#router isis

(config-router)#distance 10

The following example shows setting the administrative distance for a specific route source.

#configure terminal

(config)#router isis

(config-router)#distance 40 0000.0000.0001

distance (IPv6)

Use this command in router mode to set the administrative distance for all IPv6 routes.

Use the no parameter with this command to remove an administrative distance.

Command Syntax

distance <1-255>

no distance

Parameters

<1-255>

Distance range.

Default

By default, all options are turned off.

Command Mode

Address-family ipv6 mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

The following example shows setting the administrative distance for all routes.

#configure terminal

(config)#router isis

(config-router)#address-family ipv6

(config-router-af)#distance 14

domain password

Use this command to set the authentication password for the Level-2 domain, and optionally, the authentication password on Level-2 sequence number PDUs.

Configuring this command to enable authentication when receiving and sending link state and sequence number PDUs in Level-2 domain. The domain password must be the same in the Level-2 domain.

Use the no parameter with this command to clear the domain password.

Command Syntax

domain password WORD

domain password WORD authenticate snp (send-only|validate)

no domain password

Parameters

WORD

Password string.

authenticate

Inserts th password into Level-1 sequence number PDUs.

snp

sequence number PDUs.

send-only

Only inserts the password into the Level-1 sequence number PDUs, but does not check the password in sequence number PDUs that it receives. Use this keyword during a software upgrade to ease the transition.

validate

Inserts the password into the Level-1 sequence number PDUs and checks the password in sequence number PDUs received.

Default

By default, there is no domain password .

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#domain password mypasswd

(config)#router isis bb

(config-router)#domain password myPass authenticate snp send-only

(config)#router isis bb

(config-router)#no domain password

dynamic-hostname

Use this command to configure the hostname to advertise for an ISIS instance using the dynamic hostname exchange mechanism (RFC 2763) and system-ID-to-hostname translation. This command configures a hostname to use for the Dynamic Hostname Exchange Mechanism and System-ID to hostname translation. This is required to get accurate results when using the show isis database and a few other commands.

Use the no parameter to disable the Hostname configured.

Command Syntax

dynamic-hostname

hostname dynamic

dynamic-hostname area-tag

no dynamic-hostname

no hostname dynamic

Parameters

area-tag

Use the routing area tag as the hostname, not the router's global hostname.

Default

By default, the Dynamic Hostname Exchange Mechanism is disabled.

Command Mode

Router mode

Example

#configure terminal

(config)#router isis bb

(config-router)#dynamic-hostname area-tag

fast-reroute per-prefix

Use this command to enable Loop Free Alternate Fast Reroute (LFA FRR) for all prefixes or only those prefixes in a route map.

Use the no form of this command to disable LFA FRR.

Command Syntax

fast-reroute per-prefix (level-1|level-2) proto (ipv4) (all|route-map WORD)

no fast-reroute per-prefix (level-1|level-2) proto (ipv4)

Parameters

level-1

Level 1 only.

level-2

Level 2 only.

ipv4

IPv4 address family only.

all

All prefixes.

route-map

Prefixes from a route map.

WORD

Route map name.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 3.0.

Examples

#configure terminal

(config)#router isis 100

(config-router)#fast-reroute per-prefix level-2 proto ipv4 all

(config-router)#fast-reroute per-prefix level-1 proto ipv4 route-map rmap1 (config-router)#no fast-reroute per-prefix level-2 proto ipv4

fast-reroute per-prefix remote-lfa

Use this command to configure remote loop-free alternate fast reroute configuration for a particular level of an IS-IS instance.

Use the no parameter to remove remote loop-free alternate fast reroute configuration.

Command Syntax

fast-reroute per-prefix remote-lfa (level-1|level-2) proto ipv4 tunnel mpls-ldp

no fast-reroute per-prefix remote-lfa (level-1|level-2) proto ipv4

Parameters

level-1

Level 1 only.

level-2

Level 2 only.

Default

By default, fast-reroute per-prefix remote-lfa is not enabled.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 5.1.

Examples

#configure terminal

(config)#router isis 1

(config-router)#fast-reroute per-prefix remote-lfa level-1 proto ipv4 tunnel mpls-ldp

(config-router)#

fast-reroute terminate-hold-on interval

Use this command to set the Loop Free Alternate Fast Reroute (LFA FRR) termination hold-on timer.

Use the no form of this command to set the termination hold-on timer to its default value (1000 milliseconds).

Command Syntax

fast-reroute terminate-hold-on interval <100-100000>

no fast-reroute terminate-hold-on interval

Parameters

<100-100000>

LFA FRR termination hold-on timer interval in milliseconds.

Default

1000 milliseconds

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 3.0.

Examples

#configure terminal

(config)#router isis 100

(config-router)#fast-reroute terminate-hold-on interval 7000

(config-router)#no fast-reroute terminate-hold-on interval

fast-reroute tie-break

Use this command to set the tie-breaking policy for selecting a fast reroute repair path. You assign a priority to each type of repair path. The tie-breaker value is used to select an LFA FRR route when multiple LFA FRR routes are available for the same primary route.

Use the no form of this command to set the tie-break preference value for a protection type to its default value.

To set all types of repair paths to their default priorities, do not specify a repair path with the no form of this command.

Command Syntax

Parameters

level-1

Level 1 only.

level-2

Level 2 only.

ipv4

IPv4 address family only.

primary-path

Use a path from the Equal-Cost Multipath Path (ECMP) set. An ECMP found during the primary shortest path first (SPF) repair might not be desirable in networks where traffic exceeds the capacity of any single link.

interface-disjoint

Link protecting: prefer a backup path that uses a different interface than the interface used to reach destination via the primary path.

node-protecting

Bypass the primary-path gateway router which might not protect the router that is the next hop in the primary path. This ensures complete traffic protection even if the primary next-hop router fails.

broadcast-interface-disjoint

Do not use the interface if connected to a broadcast network. Repair paths protect links when a repair path and a protected primary path use different next-hop interfaces. However, on broadcast interfaces, if the repair path is computed via the same interface as the primary path, but their next-hop gateways are different, the router is protected but the link might not be.

secondary-path

Prefer a non-ECMP backup path.

downstream-path

Prefer a backup path to the destination which satisfies the downstream condition where the path cost to reach the destination from the LFA next hop is less than the path cost to the destination from the self node via primary next hop:

Distance_opt(N, D) < Distance_opt(S, D)

This might result in lost traffic, but prevents looping.

index

Tie breaking index. A lower value has higher preference.

<1-255>

Tie breaking index value.

Defaults

primary-path	20
interface-disjoint	60
node-protecting	30
broadcast-interface-disjoint	70
secondary-path	255
downstream-path	90

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 3.0.

Examples

#configure terminal

(config)#router isis 100

(config-router)#fast-reroute tie-break level-2 proto ipv4 node-protecting index 127

(config-router)#no fast-reroute tie-break level-1 proto ipv4 broadcastinterface-disjoint

ignore-lsp-errors

Use this command to ignore link-state packets (LSPs) with checksum errors. By default, ISIS validates the checksum for LSP and if the checksum has an error, the LSP is dropped. Giving this command says to ignore the LSP checksum error and treat it as if checksum is passed.

Use the no parameter to turn off this function.

Command Syntax

ignore-lsp-errors

no ignore-lsp-errors

Parameters

None

Default

By default, the LSP checksum is checked on receipt.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

In this sample, rtr1 does not drop LSP packets with bad checksum.

#configure terminal

(config)#router isis bb

(config-router)#ignore-lsp-errors

ip router isis

Use this command to enable ISIS IPv4 routing on the interface. This command is mandatory to ISIS configuration.

After giving this command, the router sends ISIS Hello with IP address TLV on this interface and IP reachability information TLV in link-state packets are updated.

Use the no parameter with this command to disable ISIS IPv4 routing on the interface. This action does not clear the ISIS database. To clear the database, unconfigure the ISIS routing instance.

Command Syntax

ip router isis WORD

no ip router isis WORD

Parameters

WORD

Name that identifies the IS-IS area. Specify an existing area name or a new area name.

Default

By default, IPv4 routing is disabled on the router.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#ip router isis bb

ip route high-priority tag

Use this command to set the tag value on ISIS LSP.

Command Syntax

ip route high-priority tag <1-4294967295>

Parameters

tag <1-4294967295>

Specify the high priority tag value.

Default

None

Command Mode

Router mode

Applicability

This command was introduced before OcNOS Version 6.0.0.

Example

OcNOS#configure terminal

OcNOS(config)#router isis 1

OcNOS(config-router)#ip route high-priority tag 10

ipv6 router isis

Use this command to enable ISIS IPv6 routing on the interface. This command is mandatory to IPv6 ISIS configuration. Match the ISIS instance tag to one of existing instance's tags, or a new instance with the tag name should be initiated, otherwise routing will not run on this interface.

Configuring this command, the router sends ISIS Hello with IPv6 address TLV on this interface, and IPv6 reachability information TLV in the LSP will be updated.

Use the no parameter with this command to disable ISIS IPv6 routing on the interface.

Command Syntax

ipv6 router isis WORD

no ipv6 router isis WORD

Parameters

WORD

ISIS instance name.

Default

By default, IPv6 routing is disabled on the router.

Command Mode

Interface mode

Example

#configure terminal

(config)#interface eth0

(config-if)#ipv6 router isis bb

isis authentication key-chain

Use this command to set the key chain to be used for authentication on the interface-related packets.

Authentication mode must be set to md5 to configure the key chain. If no key chain is configured with the key-chain command, no key-chain authentication is performed. Only one authentication key-chain is applied to an ISIS interface at a time. That is, issuing a second isis authentication key-chain command overrides the first isis authentication key-chain command.

If neither the level-1 nor level-2 keyword is configured, the key chain applies to the level(s) on which the authentication mode is configured as md5. Authentication can be specified for an entire instance of ISIS, instead of at the interface level, by using the authentication key-chain command.

Use the no parameter with this command to unset the key chain used for authentication on the interface-related packets.

Command Syntax

isis authentication key-chain WORD (level-1|level-2|)

no isis authentication key-chain (level-1|level-2|)

Parameters

WORD

Chain name - valid authentication keys.

level-1

Specify an authentication key-chain for level-1 PDUs.

level-2

Specify an authentication key-chain for level-2 PDUs.

Default

By default, this option is disabled. The key chain applies to the level(s) on which authentication mode is configured as MD5 if no level is specified.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth1

(config-if)#isis authentication key-chain myKey level-1

isis authentication mode md5

Use this command to set the MD5 authentication mode. If the isis password command was used, then subsequently an attempt is made to use the isis authentication mode command, the attempt fails. To configure isis authentication mode command, first use the no isis password command. If the isis authentication mode command was used, then subsequently an attempt is made to use the isis password command, the attempt fails.

To configure clear text authentication using the isis password command, first use the no isis authentication mode command. The type of authentication and the level to which it applies can be specified for the entire ISIS instance, rather than per interface, using the authentication mode command.

Use the no parameter with this command to unset the MD5 authentication mode.

Command Syntax

isis authentication mode {md5|text} (level-1|level-2|)

no isis authentication mode {md5|text} (level-1|level-2|)

Parameters

md5

Keyed message digest

text

Text mode

level-1

Specify an authentication key-chain for level-1 PDUs.

level-2

Specify an authentication key-chain for level-2 PDUs.

Default

By default, this option is disabled. The authentication mode will be set to MD5 for both levels if no level is specified.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth1

(config-if)#isis authentication mode md5 level-1

isis authentication send-only

Use this command to set the send-only option to the interface-related packets.

Use this command before configuring the ISIS authentication mode and ISIS authentication key-chain, so that the implementation of authentication goes smoothly. That is, the routers will have more time for the keys to be configured on each router if authentication is inserted only on the packets being sent, not checked on packets being received. After all routers that must communicate are configured with this command, enable the authentication mode and key chain on each router.

Use the no parameter with this command to unset the send-only option to the interface-related packets.

Command Syntax

isis authentication send-only (level-1-only|level-2-only|level-1-2)

no isis authentication send-only

Parameters

level-1-only

Set send-only option for level-1 only.

level-2-only

Set send-only option for level-2 only.

level-1-2

Set send-only option for level-1-2 only.

Default

By default, this option is disabled. The send-only option applies to both levels if no level is specified.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth1

(config-if)#isis authentication send-only level-1-only

isis bfd

Use this command to enable/disable the BFD check on interface.

The isis bfd command allows a user to enable BFD on an interface. The isis bfd disable command disables BFD checking on an interface. However, the no isis bfd and no isis bfd disable commands both remove the enable/disable configuration, but do not disable/enable BFD.

The bfd all-interfaces command enables BFD on all interfaces attached to an instance then configuring. This command disables BFD configuration on a particular interface.

Command Syntax

isis bfd (disable|)

no isis bfd (disable|)

Parameters

disable

Specify to disable BFD.

Default

By default, bfd feature enable/disable is not configured.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis bfd disable

isis circuit-type

Use this command to set the circuit type for the interface.

If level-1 or level-2-only is specified in this command, ISIS sends only the specified level of PDUs. On the point-to-point interface, there is only one type of Hello packet, so in this case ISIS Hello will be sent regardless of circuit-type. If is-type is configured as level-1 or level-2 only, routing for this instance is performed for only the specified level. In this manner, only the particular level of PDU is sent on the interface.

Use the no parameter to reset circuit type to the default.

Command Syntax

isis circuit-type (level-1|level-1-2|level-2-only)

no isis circuit-type

Parameters

level-1

Specify that only Level-1 adjacencies are formed.

level-1-2

Specify that Level-1-2 adjacencies are formed.

level-2-only

Specify that only Level-2 adjacencies are formed.

Default

By default, the default circuit-type is level-1-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis circuit-type level-2-only

isis csnp-interval

Use this command to set CSNP (Complete sequence number PDU) interval in seconds.

Configuring this command changes the interval between two consecutive CSNP transmission. By default, CSNP is sent every 10 seconds only by LAN DIS. This parameter is only valid on broadcast interface, since periodic CSNP is only sent on broadcast interface, while CSNP on Point-to-Point interface is sent only when adjacency is initiated.

Use the no parameter with this command to reset CSNP interval to the default value.

Command Syntax

isis csnp-interval <1-65535> (level-1|level-2|)

no isis csnp-interval (level-1|level-2|)

Parameters

<1-65535>

Specify the CSNP interval in seconds.

level-1

Specify Level-1 CSNP.

level-2

Specify Level-2 CSNP.

Default

By default, ISIS uses 10 seconds for the interval and the interval is applied to both level-1 and level-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis csnp-interval 20

isis fast-reroute per-prefix candidate disable

Use this command to prevent an interface from becoming an Loop Free Alternate Fast Reroute (LFA FRR) for a primary route.

Use the no form of this command to enable an interface to become an LFA FRR for a primary route.

Command Syntax

isis fast-reroute per-prefix candidate disable (level-1|level-2)

no isis fast-reroute per-prefix candidate disable (level-1|level-2)

Parameters

level-1

Level-1 only

level-2

Level-2 only

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 3.0.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis fast-reroute per-prefix candidate disable level-2

(config-if)#no isis fast-reroute per-prefix candidate disable level-2

isis hello-interval

Use this command to set the Hello interval in seconds. The Hello-interval is set with the hello-multiplier (see isis hello-multiplier command).

Configuring this command changes the time interval between two consecutive Hello transmissions. If a device receives its own LSP with a maximum sequence number, then it suspends ISIS for the hold interval. DIS sends Hello transmissions at three times the rate than non-DIS. If ISIS is elected as DIS on this interface, ISIS sends Hello every 3.3 seconds.

If minimal keyword is specified, Holding timer in Hello PDU is set to 1 second and Hello interval is calculated by dividing by the hello-multiplier. For example, if the hello-multiplier is configured as 4 and hello-interval minimal is the command used, an Hello PDU is sent every 250 milliseconds.

Use the no parameter to set the Hello interval to the default.

Command Syntax

isis hello-interval <1-65535> (level-1|level-2|)

isis hello-interval minimal (level-1-only|level-2-only|level-1-2)

no isis hello-interval (level-1|level-2|)

no isis hello-interval minimal

Parameters

<1-65535>

Specify the hello interval in seconds.

minimal

Specify the holding-time as 1 second.

level-1

Specify Level-1 CSNP.

level-2

Specify Level-2 CSNP.

level-1-only

Specify only Level-1 CSNP.

level-2-only

Specify only Level-2 CSNP.

level-1-2

Specify only Level-1-2 CSNP.

Default

By default, ISIS uses 10 seconds for the interval and the interval is applied to both level-1 and level-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#interface eth0

(config-if)#isis hello-interval 5 level-1

(config-if)#isis hello-interval minimal level-1-only

isis hello-multiplier

Use this command to set multiplier for Hello holding time.

Changes Holding Timer in Hello PDU. Holding timer is calculated by “Hello-Interval” multiplied by this value. If minimal keyword is specified with the Hello-Interval, the holding timer is set to 1 second and the hello-interval is calculated by dividing 1 by this value.

Use the no parameter with this command to set multiplier to the default.

Command Syntax

isis hello-multiplier <2-100> (level-1|level-2|)

no isis hello-multiplier (level-1|level-2|)

Parameters

<2-100>

Specify a hello multiplier value.

level-1

Specify Level-1 hello.

level-2

Specify Level-2 hello.

Default

By default, ISIS uses 3 seconds for the multiplier value and the multiplier is applied to both level-1 and level-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis hello-multiplier 4

isis hello padding

Use this command to enable IS-IS hello padding at the interface level.

Intermediate System-to-Intermediate System (IS-IS) hellos are padded to the full maximum transmission unit (MTU) size. The benefit of padding IS-IS hellos to the full MTU is that it allows for early detection of errors that result from transmission problems with large frames or errors that result from mismatched MTUs on adjacent interfaces.

Use the no parameter with this command to disable IS-IS hello padding.

Command Syntax

isis hello padding

no isis hello padding

Parameters

None

Default

By default, ISIS hello padding is enabled

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#interface eth1

(config-if)#isis hello padding

(config-if)#no isis hello padding

isis lsp-interval

Use this command to set the link-state packet (LSP) transmission interval.

Giving this command changes the minimum interval between two consecutive LSP transmission. When flooding or some other event triggers LSP transmission, the LSP is put in the interface queue and scheduled to send according to this interval. Two consecutive LSP transmissions are scheduled to have at least this interval.

Use the no parameter with this command to set LSP transmission interval to the default.

Command Syntax

isis lsp-interval <1-4294967295>

no isis lsp-interval

Parameters

<1-4294967295>

LSP transmission interval in milliseconds.

Default

By default, ISIS uses 33 milliseconds for the interval.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#interface eth0

(config-if)#isis lsp-interval 100

(config-if)#no isis lsp-interval

isis mesh-group

Use this command to set Mesh Group ID on the current interface.

Use the no parameter to unset mesh group on the current interface.

Command Syntax

isis mesh-group <1-4294967295>

no isis mesh-group

Parameters

<1-4294967295>

Specify a mesh group number

Default

By default, mesh groups are not enabled on this interface.

Command Mode

Interface mode

Examples

(config)#interface eth0

(config-if)#isis mesh-group 20

(config)#interface eth2

(config-if)#no isis mesh-group

isis metric

Use this command to set the default metric for the interface. The interface default metric is put into IP reachability information TLVs and in IS reachability information TLVs in link-state packets. The value is used for SPF calculation, and is applied when the metric-style is configured as “narrow”.

Use the no parameter with this command to set default metric to the default.

Command Syntax

isis metric <1-63> (level-1|level-2|)

no isis metric (level-1|level-2|)

Parameters

<1-63>

Default metric.

level-1

Default metric for level-1 circuit.

level-2

Default metric for level-2 circuit.

Default

By default, ISIS uses 10 for the metric value and the value is applied to both level-1 and level-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis metric 20

isis network

Use this command to change a broadcast interface network type to a point-to-point network type.

Use the no parameter with this command to revert to the default setting of a broadcast interface network type.

Command Syntax

isis network (broadcast|point-to-point)

no isis network

Parameters

broadcast

Specify ISIS a broadcast multi-access network.

point-to-point

Specify ISIS a point-to-point network.

Default

By default, the network is set to a broadcast multi-access network type.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis network point-to-point

isis password

Use this command to set the authentication password of Hello PDU on the interface.

If the isis authentication mode command was used, then subsequently an attempt is made to use the isis password command, the attempt fails. To configure clear text authentication using the isis password command, first use the no isis authentication mode command.

Use the no parameter to clear the password.

Command Syntax

isis password WORD (level-1|level-2|)

no isis password (level-1|level-2|)

Parameters

WORD

Specify a password string.

level-1

Specify a password for Level-1 hello PDUs.

level-2

Specify a password for Level-2 hello PDUs.

Default

By default, no password is configured; this applies to both level-1 and level-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis password mypassword level-1

isis priority

Use this command to set the priority for LAN DIS election. This command changes the priority value in LAN ISIS Hello PDUs. A lower priority value is less preferred in DIS election, and a higher priority value is more preferred.

Note: This command is not valid for Point-to-Point interface.

Use the no parameter to set priority to the default.

Command Syntax

isis priority <0-127> (level-1|level-2|)

no isis priority (level-1|level-2|)

Parameters

<0-127>

Priority value

level-1

Specify a password for Level-1 hello PDUs.

level-2

Specify a password for Level-2 hello PDUs.

Default

By default, ISIS uses 64 for the priority value, and the priority is applied to both level-1 and level-2.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#interface eth0

(config-if)#isis priority 127

isis retransmit-interval

Use this command to set the link-state packet (LSP) retransmission interval.

Use the no parameter to set the interval to the default.

Command Syntax

isis retransmit-interval <1-65535>

no isis retransmit-interval

Parameters

<1-65535>

Interval for retransmission of the same LSP in seconds.

Default

By default, ISIS uses an interval of 5 seconds.

Command Mode

Interface mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#interface eth0

(config-if)#isis retransmit-interval 10

(config-if)#no isis retransmit-interval

ispf

Use this command to enable incremental SPF for a routing process.

Use the no parameter to disable incremental SPF from a routing process.

Command Syntax

ispf (level-1|level-2-only|)

no ispf

Parameters

level-1

Act as level-1 only IS.

level-2-only

Act as level-2 only IS.

Default

By default, all levels are turned off.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#ispf level-1

(config)#router isis bb

(config-router)#no ispf

isis wait-timer

Use the isis wait-timer seconds command to configure the number of seconds the router will wait for adjacency information

Use the no parameter to set the wait-timer to the default.

Command Syntax

isis wait-timer <1-65535> (level-1|level-2|)

no isis wait-timer (level-1|level-2|)

Parameters

level-1

Act as level-1 only IS.

level-2

Act as level-2 only IS.

Default

By default, wait-timer will be 20 seconds (2 times the hello timer).

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#isis wait-timer 30

(config)#router isis bb

(config-router)#no isis wait-timer

isis wide-metric

Use this command to set wide metric for the interface.

Interface wide-metric is put into Extended IP reachability TLVs. Extended IS reachability TLVs and IPv6 rechability TLVs in LSPs. The value is used for SPF calculation. The value is applied when metric-style is configured as 'wide'.

Use the no parameter to set wide metric to the default.

Command Syntax

isis wide-metric <1-16777214> (level-1|level-2|)

no isis wide-metric (level-1|level-2|)

Parameters

<1-16777214>

Specify a wide metric.

level-1

Specify the wide metric for Level-1 circuit.

level-2

Specify the wide metric for Level-2 circuit.

Default

By default, ISIS uses 10 for the metric value and the metric is applied to both level-1 and level-2.

Command Mode

Interface mode

Applicability

None.

Examples

#configure terminal

(config)#interface eth0

(config-router)#isis wide-metric 100

(config)#interface eth0

(config-router)#no isis wide-metric

isis tag

Use this command to sets the tag for link-state packets (LSPs) sent out advertising routes for networks directly connected to an interface.

If you do not specify a parameter, then the tag value is set for level-1-2 boundary.

Use the no parameter to unset the tag.

Command Syntax

isis tag <1-4294967295> (level-1|level-2|)

no isis tag (level-1|level-2|)

Parameters

<1-4294967295>

Tag value.

level-1

Specify the tag value for the level-1 boundary.

level-2

Specify the tag value for the level-2 boundary.

Command Mode

Interface mode

Examples

>ena

#con term

Enter configuration commands, one per line. End with CNTL/Z.

(config)#interface eth0

(config-if)#isis tag 500 level-1

isis te-metric

Use this command to set TE metric for the interface. Interface te-metric is put into Extended IS reachability TLV. The value is used for CSPF calculation. The value is applied when metric-style is configured as wide.

Use the no parameter to unset the TE metric.

Command Syntax

isis te-metric <1-16777214> (level-1|level-2|)

no isis te-metric (level-1|level-2|)

Parameters

<1-16777214>

Specify a TE metric.

level-1

Specify the TE metric for level-1 circuit.

level-2

Specify the TE metric for level-2 circuit.

Default

By default, it will take ISIS wide metric value.

Command Mode

Interface mode

Applicability

This command was introduced in OcNOS version 5.0

Examples

#configure terminal

(config)#interface eth1

(config-router)#isis te-metric 100

(config)#interface eth1

(config-router)#no isis te-metric

is-type

Use this command to set the IS to the specified level of routing.

Changing is-type brings down, then brings up a particular level of routing. There is a limitation: Only one ISIS instance can run Level-2 routing (either Level-2 only IS, or Level-1-2 IS).

Use the no parameter to set the IS to the default.

Command Syntax

is-type (level-1|level-1-2|level-2-only)

no is-type

Parameters

level-1

Act as level-1 only IS.

level-1-2

Act as level-1-2 IS.

level-2-only

Act as level-2 only IS.

Default

By default, ISIS uses level-1-2 if there is no Level-2 instance nor a Level-1-2 instance. Otherwise, it uses level-1.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#is-type level-1

(config)#router isis bb

(config-router)#no is-type

key chain

Use this command to enter the key chain management mode and to configure a key chain with a key chain name. This command allows you to enter the keychain mode to specify keys on this key chain.

Command Syntax

key chain WORD

no key chain WORD

Parameters

WORD

Specify the name of the key chain to manage.

Default

By default, keychain mode is disabled.

Command Mode

Configure mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

The following example shows the creation of a key chain named mychain and the change to keychain mode:

#configure terminal

(config)#key chain mychain

(config-keychain)#

key-id

Use this command to manage, add or delete authentication keys in a key-chain. This command allows you to enter the keychain-key mode to set a password for the key.

Command Syntax

key-id <0-2147483647>

no key-id <0-2147483647>

Parameters

<0-2147483647>

Specify a key identifier.

Default

By default, ISIS uses level-1-2 if there is no Level-2 instance nor a Level-1-2 instance. Otherwise, it uses level-1.

Command Mode

Keychain mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

The following example configures a key number 1 and shows the change to keychain-key command mode.

#configure terminal

(config)#key chain mychain

(config-keychain)#key-id 1

(config-keychain-key)#

key-string

Use this command to define a password in plain-text to be used by a key.

The password is stored as encrypted, and is displayed in encrypted text when show running-config command is executed.

Use the no parameter with this command to disable this feature.

Command Syntax

key-string WORD

no key-string

Parameters

WORD

Specify a string of characters to be used as a password by the key. The length of the string should be between 1-80 characters.

Default

By default, password is not configured.

Command Mode

Keychain mode and Keychain-key mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

In the following example, the password for key 1 in the key chain named mychain is set to prime:

#configure terminal

(config)#key chain mychain

(config-keychain)#key-id 1

(config-keychain-key)#key-string prime

(config-keychain)#key-id 1

(config-keychain-key)#no key-string

key-string encrypted

Use this command to define a password in its encrypted format to be used by a key.

Use the no parameter with this command to disable this feature

Command Syntax

key-string encrypted WORD

no key-string encrypted

Parameters

WORD

Specify the encrypted string of characters to be used as a password by the key. The length of this string should be between 18-162 characters.

Default

By default, password is not configured.

Command Mode

Keychain mode and Keychain-key mode.

Applicability

This command was introduced in OcNOS version 4.1.

Examples:

In the following example, the encrypted password for key-id 1 in the key chain named mykeychain is set to 0xd6c50b442de47f70 (equivalent to "mychain" in plain-text):

#configure terminal

(config)#key chain mykeychain

(config-keychain)#key-id 1

(config-keychain-key)#key-string encrypted 0xd6c50b442de47f70

(config-keychain)#key-id 1

(config-keychain-key)#no key-string

lsp-gen-interval

Use this command to set the minimum interval before regenerating the same link-state packet (LSP). The smaller the interval, the faster the convergence. However, this setting might cause more frequent flooding.

Use the no parameter with this command to set the interval to the default.

Command Syntax

lsp-gen-interval <1-120>

lsp-gen-interval (level-1|level-2) <1-120>

no lsp-gen-interval (level-1|level-2|)

Parameters

<1-120>

Minimum interval in seconds.

level-1

Interval for Level-1 IS.

level-2

Interval for Level-2 IS.

Default

By default, ISIS uses 5 seconds for the interval and the interval is applied to both level-1 and level-2.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#router isis bb

(config-router)#lsp-gen-interval 10

lsp-mtu

Use this command to set maximum transfer unit for link-state packets (LSPs).

Use the no parameter with this command to set the interval to the default.

Command Syntax

lsp-mtu (level-1|level-2|) <512-4352>

no lsp-mtu (level-1|level-2|)

Parameters

<512-4352>

MTU size

level-1

Size for Level-1 IS.

level-2

Size for Level-2 IS.

Default

By default, the MTU is 1492 bytes.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#router isis bb

(config-router)#lsp-mtu 555

lsp-refresh-interval

Use this command to set the link-state packet (LSP) refresh interval.

IP Infusion Inc. recommends making the lsp-refresh-interval smaller than the max-lsp-lifetime value.

Use the no parameter to set the interval to the default value.

Command Syntax

lsp-refresh-interval <1-65535>

no lsp-refresh-interval

Parameters

<1-65535>

Refresh interval in seconds.

Default

By default, the interval is 900 seconds.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#lsp-refresh-interval 600

(config)#router isis bb

(config-router)#no lsp-refresh-interval

max-area-address

Use this command to set the maximum number of ISIS areas that can be configured on this router with the net command. By default, ISIS permits a maximum of three areas that can be defined on a router.

Use the no parameter with this command to set the maximum number of ISIS areas to its default (3).

Command Syntax

max-area-address <3-254>

no max-area-address

Parameters

<3-254>

The maximum number of areas in the network.

Default

By default, the maximum number of areas is 3.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

(config)#router isis net2

(config-router)#max-area-address 5

(config-router)#net 71.0001.0000.0000.0001.00

(config-router)#net 72.0001.0000.0000.0001.00

(config-router)#net 73.0001.0000.0000.0001.00

(config-router)#net 74.0001.0000.0000.0001.00

(config-router)#net 75.0001.0000.0000.0001.00

max-lsp-lifetime

Use this command to set the maximum link-state packet (LSP) lifetime. You must set max-lsp-lifetime greater than the lsp-refresh-interval interval.

Use the no parameter to set the lifetime to the default.

Command Syntax

max-lsp-lifetime <350-65535>

no max-lsp-lifetime

Parameters

<350-65535>

Maximum LSP lifetime in seconds.

Default

By default, max-lsp-lifetime is set to 1200 seconds.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#max-lsp-lifetime 1500

(config)#router isis bb

(config-router)#no max-lsp-lifetime

metric-style

Use this command to configure the ISIS metric style. Use the following table when changing the method of how TLV encodes and SPF calculates a decision:


Metric-style Command	Wide SPF	Wide TLV	Narrow SPF	Narrow TLV
narrow (default)	OFF	OFF	ON	OFF
narrow transition	ON	OFF	ON	ON
wide	ON	ON	OFF	OFF
wide transition	ON	ON	ON	OFF
transition	ON	ON	ON	ON

Where:

• Wide SPF: Uses wide TLVs for SPF calculation.

• Wide TLV: Encodes wide TLVs in the LSP.

• Narrow SPF: Uses narrow TLVs for SPF calculation.

• Narrow TLV: Encodes narrow TLVs in the LSP.

Use the no parameter to set the style to the default style, narrow.

Command Syntax

metric-style (narrow|wide|transition) (level-1|level-2|)

metric-style (narrow|wide) transition (level-1|level-2|)

no metric-style

Parameters

narrow

Specify the old style of TLVs with narrow metric.

wide

Specify the new style of TLVs to carry wider metric.

transition

Specify to send and accept both styles of TLVs during transition.

level-1

Specify the level-1 metric style.

level-2

Specify the level-2 metric style.

transition

Accept both styles of TLVs during transition

Default

By default, ISIS uses narrow metric style for level 1 and 2.

Command Mode

Router mode

Examples

(config)#router isis bb

(config-router)#metric-style narrow transition

mpls traffic-eng

Use this command to configure MPLS Traffic Engineering feature for ISIS.

Use the no parameter to turn off the feature.

Note: Metric-style wide must be enabled before using this CLI.

Command Syntax

mpls traffic-eng (level-1|level-2)

no mpls traffic-eng (level-1|level-2)

Parameters

level-1

Specify the level-1 MPLS Traffic Engineering feature.

level-2

Specify the level-2 MPLS Traffic Engineering feature.

Default

If this command is not used, ISIS does not encode traffic engineering TLVs and Sub-TLVs.

Command Mode

Router mode

Examples

(config)#router isis bb

(config-router)#metric-style wide

(config-router)#mpls traffic-eng level-1

(config)#router isis bb

(config-router)#no mpls traffic-eng level-1

mpls traffic-eng router-id

Use this command to configure the traffic engineering stable IP address for a system.

Use the no parameter to turn off the feature.

Command Syntax

mpls traffic-eng router-id A.B.C.D

no mpls traffic-eng router-id

Parameters

A.B.C.D

Specify the ISIS router-ID in an IP address format.

Default

If this command is not used, and traffic engineering is enabled, ISIS will use global router-id..

Command Mode

Router mode

Examples

(config)#router isis bb

(config-router)#mpls traffic-eng router-id 10.10.0.23

(config)#router isis bb

(config-router)#no mpls traffic-eng router-id

net

Use this command to add a Network Entity Title (NET) for the instance.

On a router running ISIS, a NET can be 8 to 20 bytes in length. The last byte is always the n-selector, and must be zero. The n-selector indicates no transport entity, and means that the packet is for the routing software of the system. The six bytes directly preceding the n-selector are the system ID. The system ID length is a fixed size and cannot be changed. The system ID must be unique throughout each area (Level 1) and throughout the backbone (Level 2).

The bytes preceding the system ID are the area ID, which can be from 1 - 13 bytes in length. By default, a maximum of three NETs per router are allowed with a different area ID but the system ID should be the same for all NETs. You can increase the number of area IDs per system ID with the max-area-address command.

Use the no parameter to remove the NET.

Command Syntax

net NET

no net NET

Parameters

NET

Specify a network entity title (NET) in 1 to 13 octets (that is, XX.XXXX. ... .XXXX.XX).

Default

By default, ISIS does not configure a NET and routing is not enabled for the interface.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#router isis bb

(config-router)#net 49.0000.0001.0002.0003.00

passive-interface

Use this command to suppress routing updates on all interfaces or on a specified interface, which puts the interfaces into passive mode.

To advertise passive prefixes in LSP, an interface must be configured with ip router isis when using "passive-interface" command. If interface is not configured with isis instance "passive-interface IFNAME" command must be used to add that interface as passive. Enabling passive interface on an ISIS enabled interface disables ISIS routing updates on the interface and makes the interface passive.

Use the no parameter with this command to remove interfaces from passive mode.

Note: The command passive-interface IFNAME disable is used to make a particular interface active after the passive-interface command (with no parameters) has set all interfaces as passive.

Command Syntax

passive-interface

passive-interface IFNAME

passive-interface IFNAME disable

no passive-interface

no passive-interface IFNAME

no passive-interface IFNAME disable

Parameters

IFNAME

Interface name. If this parameter is omitted, then all interfaces become passive or active.

disable

Disable passive interface.

Command Mode

Router mode

Examples

The following suppresses routing updates on a specified interface.

#configure terminal

(config)#router isis 100

(config-router)#passive-interface

(config-router)#passive-interface eth0 disable

prc-interval-exp

Use this command to configure exponential back-off delay between PRC calculations.

Use the no parameter to disable any set exponential back-off delay between PRC calculations.

Command Syntax

prc-interval-exp

prc-interval-exp <0-2147483647> <0-2147483647>

no prc-interval-exp

Parameters

<0-2147483647>

Set the minimum delay between receiving a change to PRC calculation in milliseconds.

<0-2147483647>

Set the maximum delay between receiving a change to PRC calculation in milliseconds.

Default

By default, minimum delay is 500 milliseconds and maximum delay is 50 seconds.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

(config)#router isis

(config-router)#prc-interval-exp 100 10000

(config)#router isis

(config-router)#no prc-interval-exp

redistribute

Use this command to redistribute routes from another protocol into the ISIS routing table.

Use the no form of this command to disable redistribution.

Command Syntax

redistribute (connected|static|rip|ospf|bgp) {metric <0-16777215>| metric-type (internal|external)|level-1|level-2|level-1-2|route-map WORD}

no redistribute (connected|static|rip|ospf|bgp) {metric <0-16777215>| metric-type (internal|external)|level-1|level-2|level-1-2|route-map WORD}

Parameters

connected

Redistribute connected routes.

static

Redistribute static routes.

rip

Redistribute RIP routes.

ospf

Redistribute OSPF routes.

bgp

Redistribute BGP routes.

metric

Metric for redistributed routes.

<0-16777215>

IS-IS default metric.

metric-type

IS-IS exterior metric type for redistributed routes:

internal

IS-IS internal metric type.

external

IS-IS external metric type.

level-1

Redistribute routes into level 1 only.

level-2

Redistribute routes into level 2 only (default).

level-1-2

Redistribute routes into both levels.

route-map

Route map reference.

WORD

Route map name.

Default

By default, redistribution is disabled.

If no level parameter is specified, by default redistributed routes will be added in level-2 LSP. If is-type of an IS-IS instance is level-1, the level parameter must be set to level-1 for redistribute command to take effect and redistribute routes in L1 LSP.

Command Mode

For IPv4: Router mode

For IPv6: address-family ipv6 mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

(config)#router isis A

(config-router)#redistribute bgp metric 12

redistribute isis

Use this command to redistribute reachability information from one level to the other level. If an distribute-list name is given with this command for an access list that does not exist, the routes are still redistributed.

Use the no form of this command to disable redistribution.

Command Syntax

redistribute isis level-1 into level-2

redistribute isis level-2 into level-1

redistribute isis level-1 into level-2 distribute-list WORD

redistribute isis level-2 into level-1 distribute-list WORD

no redistribute isis level-1 into level-2

no redistribute isis level-2 into level-1

Parameters

level-1

Specify an inter-area route from level-1.

level-2

Specify an inter-area routes from level-2.

into

Specify a level from level-n into level-m.

level-1

Specify an inter-area route into level-1.

level-2

Specify an inter-area routes into level-2.

distribute-list

Indicate the distributed-list parameter.

WORD

Specify the actual selected route.

Default

By default, ISIS redistributes selected L1 routes into L2.

Command Mode

For Ipv4: Router mode

For Ipv6: address-family ipv6 mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#redistribute isis level-2 into level-1

(config)#router isis bb

(config-router)#redistribute isis level-2 into level-1 distribute-list new

(config)#router isis bb

(config-router)#no redistribute isis level-2 into level-1

redistribute isis WORD

Use this command to redistribute reachability information from one isis instance into another instance. Only one isis instance can be redistributed.

Use the no parameter with this command to stop redistribution.

Note: This command is not supported for address family IPv6.

Command Syntax

redistribute isis WORD {metric <0-16777215>| metric-type (internal | external ) |level-1|level-2|level-1-2|route-map WORD}

no redistribute isis WORD {metric <0-16777215>| metric-type (internal|external) |level-1|level-2|level-1-2|route-map WORD}

Parameters

WORD

Specify an isis instance name or tag

metric

Specify the metric for redistributed routes.

<0-16777215>

Specify the IS-IS default metric.

metric-type

Specify the IS-IS exterior metric type for redistributed routes:

internal

Set IS-IS internal metric type.

external

Set IS-IS external metric type.

level-1

IS-IS Level-1 routes.

level-2

IS-IS Level-2 routes.

level-1-2

IS-IS Level-1 and Level-2 routes.

route-map

Specify a Route map reference.

WORD

Specify name of the route-map.

Default

By default, redistribute command is disabled.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

(config)#router isis A

(config-router)#redistribute isis B metric 12

router isis

Use this command to initiate an ISIS routing instance. This command starts the ISIS routing instance and enters router configuration mode. Configure at least one NET to start routing. Also, enable a particular interface with the ip router isis command.

Use the no parameter with this command to remove an ISIS routing instance.

Command Syntax

router isis WORD

no router isis WORD

Parameters

WORD

Name that specifies an ISO routing instance tag.

Default

By default, ISIS routing instance is not configured.

Command Mode

Configure mode

Applicability

This command was introduced before OcNOS version 1.3.

Example

#configure terminal

(config)#router isis New

(config-router)#

send-lifetime

Use this command to specify the time period during which the authentication key on a key chain can be sent.

Use the no parameter with this command to negate this command.

Command Syntax

send-lifetime HH:MM:SS MONTH <01-31> <1993-2035> HH:MM:SS MONTH <01-31> <1993-2035>

send-lifetime HH:MM:SS MONTH <01-31> <1993-2035> infinite

send-lifetime HH:MM:SS MONTH <01-31> <1993-2035> duration <1-2147483646>

no send-lifetime

Parameters

HH:MM:SS

Specify the start time of send-lifetime in hours, minutes and seconds.

<01-31>

Specify the day of the month to start. If the day is a single-digit, the leading 0 must be added, example: 01, 02, 03, etc.

MONTH

Specify the month of the year to start as the first three letters of the month with first letter in caps, for example, Jan. (case sensitive)

<1993-2035>

Specify the year to start.

HH:MM:SS

Specify the end time of send-lifetime in hours, minutes and seconds.

<01-31>

Specify the day of the month to end. If the day is a single-digit, the leading 0 must be added, example: 01, 02, 03, etc.

MONTH

Specify the month of the year to end as the first three letters of the month with first letter in caps, for example, Jan. (case sensitive)

<1993-2035>

Specify the year to end.

duration

Indicate the duration parameter.

<1-2147483646>

Specify the actual end time duration of a key in seconds.

infinite

Specify the end time to never expire.

Applicability

No default value is specified

Command Mode

Keychain-key mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

The following example shows the setting of send-lifetime for key-id 1 on the key chain named mychain:

#configure terminal

(config)#key chain mychain

(config-keychain)#key-id 1

(config-keychain-key)#send-lifetime 03:03:01 Jan 03 2004 04:04:02 Dec 06 2006

set-overload-bit

Use this command to set the overload-bit in self link-state packets (LSPs), preventing the router from being used as a transit router during SPF calculation. The router will still receive LSPs even when the overload bit is set.

Use the no parameter to clear the overload-bit from self-LSPs.

Command Syntax

set-overload-bit ({suppress (external|interlevel|external interlevel|interlevel external)|on-startup (<5-86400>|wait-for-bgp)}|)

no set-overload-bit

Parameters

suppress	Suppresses the redistribution of the specified types of reachability data during overload state.
external	Suppresses the redistribution of external reachability, preventing the advertisement of IP prefixes learned from other protocols.
interlevel	Suppresses the redistribution of interlevel reachability.
external interlevel or interlevel external	Suppresses the redistribution of both external and interlevel reachability.
on-startup	Sets the overload bit only at startup and clears the bit after the specified interval has elapsed.
<5-86400>	Specifies the time in seconds to advertise oneself as overloaded after a reboot.
wait-for-bgp	Sets the overload bit at startup, then clears the bit after BGP signals it has finished converging, or clears it after 10 minutes if BGP does not signal convergence. If BGP is not running, clears the overload bit immediately.

Default

The overload-bit is not set by default.

Command Mode

Router mode

Applicability

This command was introduced in OcNOS version 6.4.2.

Example

This example configures the router to set the overload bit at startup, does not allow the unset of the overload bit until BGP converges, suppresses redistribution between levels, and suppresses redistribution from external routing protocols while the overload bit is set.

OcNOS(config)#router isis bb

OcNOS(config-router)#set-overload-bit on-startup wait-for-bgp suppress interlevel external

snmp context

Use this command to configure the SNMP context name that is mapped to each isis instance.

When context name is configured isis OID is registered with SNMP to that context.

Use no form of the command to un-map the SNMP context name from isis instance and unregister isis OID from SNMP.

Command Syntax

snmp context-name WORD

no snmp context-name

Parameters

WORD

SNMP context name (Maximum 32 alphanumeric characters)

Default

Option is disabled.

Command Mode

Router mode

Applicability

This command was introduced in OcNOS version 6.4.1.

Examples

OcNOS#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

OcNOS(config)#router isis 1

OcNOS(config-router)#snmp context-name context1

snmp restart isis

Use this command to restart SNMP in Intermediate System to Intermediate System (IS-IS)

Command Syntax

snmp restart isis

Parameters

None

Default

By default, snmp restart is not configured.

Command Mode

Configure mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#snmp restart isis

spf-interval-exp

Use this command to set the minimum and maximum hold intervals between Shortest Path First (SPF) calculations.

The spf-interval-exp command configures the minimum and maximum interval time between the receipt of a topology change and the calculation of the SPF.

Use the no parameter with this command to set the minimum and maximum hold intervals to the default.

Command Syntax

spf-interval-exp <0-2147483647> <0-2147483647>

spf-interval-exp (level-1|level-2) <0-2147483647> <0-2147483647>

no spf-interval-exp ((level-1|level-2)|)

Parameters

<0-2147483647>

Specify the minimum delay between receiving a change to the SPF calculation in milliseconds. The default SPF minimum hold-time interval value is 500 milliseconds.

<0-2147483647>

Specify the maximum delay between receiving a change to the SPF calculation in milliseconds. The default SPF maximum hold-time interval value is 50 seconds.

level-1

Specify an interval for Level-1 IS.

level-2

Specify an interval for Level-2 IS.

Default

By default, ISIS uses 500 milliseconds and 50,000 milliseconds for the minimum and maximum hold intervals, respectively. The values are applied to both level-1 and level-2 if the level parameter is omitted.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#spf-interval-exp level-1 600 60000

(config)#router isis bb

(config-router)#no spf-interval-exp level-1

summary-address

Use this command to configure Summary Address to summarize IPv4 reachability information.

Use the no parameter with this command to unconfigure the summary.

Command Syntax

summary-address A.B.C.D/M (level-1 |level-1-2 |level-2) (metric <1-63>|)

no summary-address A.B.C.D/M

Parameters

A.B.C.D/M

Specify the IPv4 prefix to be announced.

level-1

Specify the reachability information only for Level-1.

level-1-2

Specify the reachability information for both Level-1 and Level-2.

level-2

Specify the reachability information only for Level-2.

metric

Specify the metric for the summarized address.

<1-63>

Specify the metric. The default is 0.

Default

By default, ISIS does not configure the summary-address. Level must be configured along with summary-address. Metric is optional.

Command Mode

Router mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis bb

(config-router)#summary-address 10.10.0.0/16 level-1-2 metric 3

(config)#router isis bb

(config-router)#no summary-address 10.10.0.0/16

summary-prefix

Use this command to configure Summary Prefix to summarize IPv6 reachability information.

Use the no parameter with this command to unconfigure the summary.

Command Syntax

summary-prefix X:X::X:X/M (level-1 |level-1-2 |level-2) (metric <1-63>|)

no summary-prefix X:X::X:X/M

Parameters

X:X::X:X/M

Specify the IPv6 prefix to be announced.

level-1

Specify the reachability information only for Level-1.

level-1-2

Specify the reachability information for both Level-1 and Level-2.

level-2

Specify the reachability information only for Level-2.

metric

Specify the metric for the summarized address.

<1-63>

Specify the metric. The default is 0.

Default

By default, ISIS does not configure the summary-prefix. Level must be configured along with summary-prefix. Metric is optional.

Command Mode

Address Family IPv6 mode

Applicability

This command was introduced before OcNOS version 1.3.

Examples

#configure terminal

(config)#router isis 1

(config-router)#address-family ipv6

(config-router-af)#summary-prefix 2356::1/64 level-1 metric 30