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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 35 Configuring IP Unicast Routing
Configuring ISO CLNS Routing
To disable IS-IS routing, use the no router isis area-tag router configuration command.
This example shows how to configure three routers to run conventional IS-IS as an IP routing protocol.
In conventional IS-IS, all routers act as Level 1 and Level 2 routers (by default).
Router A
Switch(config)# clns routing
Switch(config)# router isis
Switch(config-router)# net 49.0001.0000.0000.000a.00
Switch(config-router)# exit
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config-router)# exit
Router B
Switch(config)# clns routing
Switch(config)# router isis
Switch(config-router)# net 49.0001.0000.0000.000b.00
Switch(config-router)# exit
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config-router)# exit
Router C
Switch(config)# clns routing
Switch(config)# router isis
Switch(config-router)# net 49.0001.0000.0000.000c.00
Switch(config-router)# exit
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config-router)# exit
Configuring IS-IS Global Parameters
These are some optional IS-IS global parameters that you can configure:
• You can force a default route into an IS-IS routing domain by configuring a default route controlled
by a route map. You can also specify other filtering options configurable under a route map.
• You can configure the router to ignore IS-IS LSPs that are received with internal checksum errors
or to purge corrupted LSPs, which causes the initiator of the LSP to regenerate it.
Step 13
show isis [area tag] database detail Verify your entries.
Step 14
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose