OcNOS-SP : Layer 3 Guide : Open Shortest Path First Command Reference : OSPFv3 Commands : show ipv6 ospf neighbor
show ipv6 ospf neighbor
Use this command to display information about an OSPFv3 neighbor.
Command Syntax
show ipv6 ospf neighbor
show ipv6 ospf WORD neighbor
show ipv6 ospf neighbor INTERFACE
show ipv6 ospf WORD neighbor INTERFACE
show ipv6 ospf neighbor INTERFACE detail
show ipv6 ospf WORD neighbor INTERFACE detail
show ipv6 ospf neighbor detail
show ipv6 ospf WORD neighbor detail
show ipv6 ospf neighbor A.B.C.D
show ipv6 ospf WORD neighbor A.B.C.D
Parameters
WORD
Tag value to use as a “match” value for controlling redistribution via route maps.
INTERFACE
Display the name of the Interface
A.B.C.D
Neighbor IP address.
detail
Details of neighbors
Command Mode
Privileged Exec mode and Exec Mode
Applicability
This command was introduced before OcNOS version 1.3.
Example
This is a sample output from the show ipv6 ospf neighbor command displaying information about the OSPFv3 neighbor.
#show ipv6 ospf neighbor
OSPFv3 Process (*null*)
Neighbor ID Pri State Dead Time Interface Instance ID
5.6.7.8 1 Full/DR 00:00:38 eth0 0
 
If Hello Suppression is enabled
RTR_B#
RTR_B#show ipv6 ospf neighbor
OSPFv3 Process (1)
Neighbor ID Pri State Dead Time Interface Instance ID
1.1.1.1 1 Full/ - inactive eth1 0
4.4.4.4 1 Full/DR 00:00:40 eth2 0
4.4.4.4 1 Full/ - inactive VLINK1 0
RTR_B#
 
RTR_B#
RTR_B#show ipv6 ospf neighbor detail
Neighbor 1.1.1.1, interface address fe80::5054:ff:feb3:d3bc
In the area 0.0.0.0 via interface eth1
Neighbor priority is 1, State is Full, 7 state changes
Hello is suppressed
DR is 0.0.0.0 BDR is 0.0.0.0
Options is 0x000133 (AF|*|*|DC|R|-|-|E|V6)
Dead timer due in inactive
Database Summary List 0
Link State Request List 0
Table 3-54 explains the fields for each ospf neighbor entry.
 
Table 3-54: show ipv6 ospf neighbor output details 
Field
Description
Neighbor
Router ID of the neighbor router.
interface address
IPv6 address of the neighbor’s interface.
In the area
The neighbor router’s area ID.
via interface
Neighbor router’s interface name.
Neighbor Priority is
OSPFv3 router priority for the interface. The range is 0 to 255. A router with priority 0 can never become the designated router, the default is 1.
State
The Link State Address (LSA) of the neighbor, and there has been 7 state changes, and sending Hello packets is suppressed.
DR
Designated Router (DR) ID
BDR
Backup Designated Router (BDR) ID
Options is
The hexadecimal representation of the seven bits in the Options Field of Hello packets (see RFC 5340):
• AF-bit – Address Family bit.
• V6-bit – If this bit is clear, the router/link should be excluded from IPv6 routing calculations.
• E-bit – This bit describes the way AS-external-LSAs are flooded.
• N-bit – This bit indicates whether or not the router is attached to an NSSA.
• R-bit – This bit (the `Router' bit) indicates whether the originator is an active router. If the router bit is clear, then routes that transit the advertising node cannot be computed. Clearing the router bit is appropriate for a multi-homed host that wants to participate in routing, but does not want to forward non-locally addressed packets.
• DC-bit – This bit describes the router's handling of demand circuits, as specified in [DEMAND].
• *-bit – These bits are reserved for migration of OSPFv2 protocol extensions.
Dead timer due in
The countdown timer for marking neighbor connections dead. In this example, the Deat Timer has been deactivated.
Database Summary List
Describes routes to IPv6 address prefixes that belong to other areas.
Link State Request List
Sent or received when Link-State Request packets finds that parts of the Link State Database are out of date.
Timer interval configured
The set values for the following packet types: Hello, Dead, Wait, Retransmit.
Neighbor Count
The number of known neighbors.
Adjacent neighbor count
The number of directly adjacent neighbors.
Last modified date: 10/16/2023