IS-IS IPv4 TE-Metric Extension
This chapter contains basic IS-IS TE-Metric Extension configuration examples.
A TE link represents an IS-IS/OSPF link state advertisement and a link state database of certain physical resources and their properties between two nodes. Typically, a TE link is advertised as an adjunct to a "regular" OSPF or IS-IS link. That is, an adjacency is brought up on the link. When the link is up, both the regular IGP properties of the link (for example, the SPF metric) and the TE properties of the link are then advertised.
Note: Bandwidth-measurement values should be less than maximum link bandwidth configuration.
Topology
Basic IS-IS Topology
Configuration
R1
#configure terminal | Enter configure mode. |
(config)#interface eth1 | Enter interface mode. |
(config-if)#ip address 21.21.21.2/24 | Configure IP address on interface. |
(config-if)#isis circuit-type level-2 | Configure ISIS circuit-type as Level-2. |
(config-if)#isis te-metric 40 level-2 | Configure ISIS te-metric |
(config-if)#bandwidth-measurement static uni-available-bandwidth 8g | Configure Bandwidth-measurement uni-available-bandwidth |
(config-if)#delay-measurement static uni-delay-variation 12 | Configure delay-measurement uni-delay-variation static |
(config-if)#delay-measurement static uni-link-delay 12 | Configure delay-measurement uni-link-delay static |
(config-if)#loss-measurement static uni-link-loss 12.3 | Configure loss-measurement uni-link-loss static |
(config-if)#ip router isis ABC | Enable IS-IS routing on an interface for area 49 (ABC). |
(config-if)#commit | Commit candidate configuration to the running configuration. |
(config-if)#exit | Exit interface mode. |
(config)#router isis ABC | Create an IS-IS routing instance for area 49 (ABC). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#mpls traffic-eng level-2 | Enable MPLS-TE in is-type Level-2 |
(config-router)#is-type level-2-only | Configure instance as level-2-only routing. |
(config-router)#net 49.0000.0000.0001.00 | Set a Network Entity Title for this instance, specifying the area address and the system ID. |
(config-router)#commit | Commit candidate configuration to the running configuration. |
R2
#configure terminal | Enter configure mode. |
(config)#interface eth1 | Enter interface mode. |
(config)#ip address 21.21.21.1/24 | Configure IP address on interface. |
(config-if)#isis circuit-type level-2 | Configure ISIS circuit-type as Level-2. |
(config-if)#isis te-metric 40 level-2 | Configure ISIS Te-metric |
(config-if)#delay-measurement static uni-delay-variation 12 | Configure delay-measurement uni-delay-variation static |
(config-if)#delay-measurement static uni-link-delay 24 | Configure delay-measurement uni-link-delay static |
(config-if)#loss-measurement static uni-link-loss 23.3 | Configure loss-measurement uni-link-loss static |
(config-if)#commit | Commit candidate configuration to the running configuration. |
(config-if)#ip router isis ABC | Enable IS-IS routing on an interface for area 49 (ABC). |
(config-if)#exit | Exit interface mode. |
(config)#router isis ABC | Create an IS-IS routing instance for area 49 (ABC). |
(config-router)#metric-style wide | Configure the new style of metric type as wide. |
(config-router)#mpls traffic-eng level-2 | Enable MPLS-TE in is-type Level-2 |
(config-router)#is-type level-2-only | Configure instance as level-2-only routing. |
(config-router)#net 49.0000.0000.0002.00 | Set a Network Entity Title for this instance, specifying the area address and the system ID. |
(config-router)#commit | Commit candidate configuration to the running configuration. |
Validation
R1#show clns neighbors
Total number of L1 adjacencies: 0
Total number of L2 adjacencies: 1
Total number of adjacencies: 1
Tag ABC: VRF : default
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0002 eth1 5254.002a.230a Up 24 L2 IS-IS
R2#show clns neighbors
Total number of L1 adjacencies: 0
Total number of L2 adjacencies: 1
Total number of adjacencies: 1
Tag ABC: VRF : default
System Id Interface SNPA State Holdtime Type Protocol
0000.0000.0001 eth1 5254.00dc.0b76 Up 6 L2 IS-IS
R1#show clns is-neighbors
Tag ABC: VRF : default
System Id Interface State Type Priority Circuit Id
0000.0000.0002 eth1 Up L2 64 0000.0000.0001.01
R2#show clns is-neighbors
Tag ABC: VRF : default
System Id Interface State Type Priority Circuit Id
0000.0000.0001 eth1 Up L2 64 0000.0000.0001.01
R1#show isis database verbose
Tag ABC: VRF : default
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0001.00-00* 0x00000091 0x6A2D 1153 0/0/0
Area Address: 49
NLPID: 0xCC
IP Address: 21.21.21.2
Router ID: 10.12.65.109
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 21.21.21.2
Neighbor IP Address: 21.21.21.2
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: 40
Link Delay : 12 us Anomalous : 0
Link Delay-variation : 12 us
Link Loss : 12.300000%, Anomalous : 0
Link Available Bandwidth: 8g
Metric: 10 IP-Extended 21.21.21.0/24
0000.0000.0001.01-00* 0x0000008D 0x78C5 628 0/0/0
Metric: 0 IS-Extended 0000.0000.0001.00
Metric: 0 IS-Extended 0000.0000.0002.00
0000.0000.0002.00-00 0x0000008F 0xABF0 992 0/0/0
Area Address: 49
NLPID: 0xCC
IP Address: 21.21.21.1
Router ID: 10.12.65.153
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 21.21.21.1
Neighbor IP Address: 21.21.21.2
Maximum Link Bandwidth: 100m
Reservable Bandwidth: 100m
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100m
Unreserved Bandwidth at priority 1: 100m
Unreserved Bandwidth at priority 2: 100m
Unreserved Bandwidth at priority 3: 100m
Unreserved Bandwidth at priority 4: 100m
Unreserved Bandwidth at priority 5: 100m
Unreserved Bandwidth at priority 6: 100m
Unreserved Bandwidth at priority 7: 100m
TE-Default Metric: 30
Link Delay : 24 us Anomalous : 0
Link Delay-variation : 12 us
Link Loss : 23.299998%, Anomalous : 0
Metric: 10 IP-Extended 21.21.21.0/24
R2#show isis database verbose
Tag ABC: VRF : default
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.0001.00-00 0x00000092 0x682E 833 0/0/0
Area Address: 49
NLPID: 0xCC
IP Address: 21.21.21.2
Router ID: 10.12.65.109
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 21.21.21.2
Neighbor IP Address: 21.21.21.2
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: 40
Link Delay : 12 us Anomalous : 0
Link Delay-variation : 12 us
Link Loss : 12.300000%, Anomalous : 0
Link Available Bandwidth: 8g
Metric: 10 IP-Extended 21.21.21.0/24
0000.0000.0001.01-00 0x0000008E 0x76C6 308 0/0/0
Metric: 0 IS-Extended 0000.0000.0001.00
Metric: 0 IS-Extended 0000.0000.0002.00
0000.0000.0002.00-00* 0x00000090 0xA9F1 674 0/0/0
Area Address: 49
NLPID: 0xCC
IP Address: 21.21.21.1
Router ID: 10.12.65.153
Metric: 10 IS-Extended 0000.0000.0001.01
IPv4 Interface Address: 21.21.21.1
Neighbor IP Address: 21.21.21.2
Maximum Link Bandwidth: 100m
Reservable Bandwidth: 100m
Unreserved Bandwidth:
Unreserved Bandwidth at priority 0: 100m
Unreserved Bandwidth at priority 1: 100m
Unreserved Bandwidth at priority 2: 100m
Unreserved Bandwidth at priority 3: 100m
Unreserved Bandwidth at priority 4: 100m
Unreserved Bandwidth at priority 5: 100m
Unreserved Bandwidth at priority 6: 100m
Unreserved Bandwidth at priority 7: 100m
TE-Default Metric: 30
Link Delay : 24 us Anomalous : 0
Link Delay-variation : 12 us
Link Loss : 23.299998%, Anomalous : 0
Metric: 10 IP-Extended 21.21.21.0/24