Enable MPLS-TE in Level-1 and Level-2 on L1-L2 IS
In the following example, R1 is the L1 router, R2 is the L1/L2 router enabling MPLS-TE for both Level-1 and Level-2 IS, and R3 is the L2 router. The following configuration is given for R1, R2 and R3.
Figure 15-122: MPLS-TE Topology
Configuration
R2
#configure terminal | Enter Configure mode. |
(config)#interface eth1 | Specify the interface (eth1) to configure, and enter Interface mode. |
(config-if)#ip address 13.1.1.2/24 | Configure ip address to the interface eth1. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth1. |
(config-if)#isis circuit-type level-1 | Configure ISIS circuit-type as Level-1 |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#interface eth2 | Enter Interface eth2 configure mode. |
(config-if)#ip address 15.1.1.2/24 | Configure ip address to the interface eth2. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth2. |
(config-if)#isis circuit-type level-2 | Configure ISIS circuit-type as Level-2. |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#router isis 1 | Create an IS-IS routing instance for area 49 (1). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#mpls traffic-eng router-id 2.2.2.2 | Configure MPLS-TE unique router-id TLV. |
(config-router)#mpls traffic-eng level-1 | Enable MPLS-TE in is-type Level-1. |
(config-router)#mpls traffic-eng level-2 | Enable MPLS-TE in is-type Level-2. |
(config-router)#net 49.0001.0000.0000.0002.00 | Configure the ISIS net address with area id as: 49.0001 and system id as: 0000.0000.0002. |
(config-router)#commit | Commit candidate configuration to the running configuration |
(config-router)#end | Exit Router mode. |
R1
#configure terminal | Enter Configure mode. |
(config)#interface eth1 | Specify the interface (eth1) to configure, and enter Interface mode. |
(config-if)#ip address 13.1.1.1/24 | Configure ip address to the interface eth1. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth1. |
(config-if)#isis circuit-type level-1 | Configure ISIS circuit-type as Level-1 |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#router isis 1 | Create an IS-IS routing instance for area 49 (1). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#is-type level-1 | Configure IS-Type as Level-1 router. |
(config-router)#mpls traffic-eng router-id 1.1.1.1 | Configure MPLS-TE unique router-id TLV. |
(config-router)#mpls traffic-eng level-1 | Enable MPLS-TE in is-type Level-1. |
(config-router)#net 49.0001.0000.0000.0001.00 | Configure the ISIS net address with area id as: 49.0001 and system-id as: 0000.0000.0001. |
(config-router)#commit | Commit candidate configuration to the running configuration |
(config-router)#end | Exit Router mode. |
R3
#configure terminal | Enter Configure mode. |
(config)#interface eth2 | Specify the interface (eth2) to configure, and enter Interface mode. |
(config-if)#ip address 15.1.1.3/24 | Configure ip address to the interface eth1. |
(config-if)#ip router isis 1 | Enable ISIS on interface eth1. |
(config-if)#isis circuit-type level-2 | Configure ISIS circuit-type as Level-2 |
(config-if)#commit | Commit candidate configuration to the running configuration |
(config-if)#exit | Exit from interface configuration mode. |
(config)#router isis 1 | Create an IS-IS routing instance for area 49 (1). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#is-type level-2 | Configure IS-Type as Level-1 router. |
(config-router)#mpls traffic-eng router-id 3.3.3.3 | Configure MPLS-TE unique router-id TLV. |
(config-router)#mpls traffic-eng level-2 | Enable MPLS-TE in is-type Level-2. |
(config-router)#net 49.0001.0000.0000.0003.00 | Configure the ISIS net address with area id as: 49.0001 and system-id as: 0000.0000.0003. |
(config-router)#commit | Commit candidate configuration to the running configuration |
(config-router)#end | Exit Router mode. |
Validation
R2
Check the output of “show clns neighbors” to verify that ISIS adjacency is up.
#show clns neighbors
Area 1:
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0001 eth1 5254.00bb.5e85 Up 24 L1 IS-IS
0000.0000.0003 eth2 5254.00ac.f960 Up 9 L2 IS-IS
#
Check the output of “show isis database level-1 verbose” to verify that LSP does have correct router-id.
R2#show isis database level-1 verbose
Tag 1: VRF : default
IS-IS Level-1 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0001.00-00 0x00000003 0x5D0E 629 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.1
Router ID: 1.1.1.1
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.1
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 13.1.1.0/24
0000.0000.0001.01-00 0x00000002 0x8D3E 629 0/0/0
Metric: 0 IS-Extended 0000.0000.0001.00
Metric: 0 IS-Extended 0000.0000.0002.00
0000.0000.0002.00-00* 0x00000004 0xE080 634 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.2
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 13.1.1.0/24
Check the output of “show isis database level-2 verbose” to verify that LSP does have correct router-id.
R2#show isis database level-2 verbose
Tag 1: VRF : default
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0002.00-00* 0x00000005 0xEE2C 622 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0003.01
IPv4 Interface Address: 15.1.1.2
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 15.1.1.0/24
Metric: 10 IP-Extended 13.1.1.0/24
0000.0000.0003.00-00 0x00000003 0x94BA 616 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.3
Router ID: 3.3.3.3
Metric: 10 IS-Extended 0000.0000.0003.01
IPv4 Interface Address: 15.1.1.3
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 15.1.1.0/24
0000.0000.0003.01-00 0x00000002 0x9134 616 0/0/0
Metric: 0 IS-Extended 0000.0000.0003.00
Metric: 0 IS-Extended 0000.0000.0002.00
R1
Check the output of “show clns neighbors” to verify that ISIS adjacency is up.
#show clns neighbors
Area 1:
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0002 eth1 5254.00f6.4ae7 Up 7 L1 IS-IS
Check the output of “show isis database level-1 verbose” to verify that LSP does have correct router-id.
R1#show isis database level-1 verbose
Tag 1: VRF : default
IS-IS Level-1 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0001.00-00* 0x00000003 0x5D0E 364 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.1
Router ID: 1.1.1.1
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.1
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 13.1.1.0/24
0000.0000.0001.01-00* 0x00000002 0x8D3E 364 0/0/0
Metric: 0 IS-Extended 0000.0000.0001.00
Metric: 0 IS-Extended 0000.0000.0002.00
0000.0000.0002.00-00 0x00000004 0xE080 368 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 13.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 13.1.1.2
Neighbor IP Address: 13.1.1.1
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 13.1.1.0/24
R3
Check the output of “show clns neighbors” to verify that ISIS adjacency is up.
#sh clns neighbors
Area 1:
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0002 eth2 5254.0062.3ea6 Up 21 L2 IS-IS
Check the output of “show isis database level-2 verbose” to verify that LSP does have correct router-id.
R3#show isis database level-2 verbose
Tag 1: VRF : default
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0002.00-00 0x00000005 0xEE2C 337 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.2
Router ID: 2.2.2.2
Metric: 10 IS-Extended 0000.0000.0003.01
IPv4 Interface Address: 15.1.1.2
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 15.1.1.0/24
Metric: 10 IP-Extended 13.1.1.0/24
0000.0000.0003.00-00* 0x00000003 0x94BA 333 0/0/0
Area Address: 49.0001
NLPID: 0xCC
IP Address: 15.1.1.3
Router ID: 3.3.3.3
Metric: 10 IS-Extended 0000.0000.0003.01
IPv4 Interface Address: 15.1.1.3
Neighbor IP Address: 15.1.1.3
Maximum Link Bandwidth: 10g
Reservable Bandwidth: 10g
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 10g
Unreserved Bandwidth at priority 1: 10g
Unreserved Bandwidth at priority 2: 10g
Unreserved Bandwidth at priority 3: 10g
Unreserved Bandwidth at priority 4: 10g
Unreserved Bandwidth at priority 5: 10g
Unreserved Bandwidth at priority 6: 10g
Unreserved Bandwidth at priority 7: 10g
TE-Default Metric: 10
Metric: 10 IP-Extended 15.1.1.0/24
0000.0000.0003.01-00* 0x00000002 0x9134 333 0/0/0
Metric: 0 IS-Extended 0000.0000.0003.00
Metric: 0 IS-Extended 0000.0000.0002.00
Last modified date: 08/28/2023