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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
This feature is automatically enabled and requires no configuration. For more information on this
feature, see the Integrated IS-IS Nonstop Forwarding (NSF) Awareness Feature Guide at this URL:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_white_paper09186a00801541c7.s
html
Enabling IS-IS Routing
To enable IS-IS, you specify a name and NET for each routing process. You then enable IS-IS routing
on the interface and specify the area for each instance of the routing process.
Beginning in privileged EXEC mode, follow these steps to enable IS-IS and specify the area for each
instance of the IS-IS routing process:
Command Purpose
Step 1 configure terminal Enter global configuration mode.
Step 2 clns routing Enable ISO connectionless routing on the switch.
Step 3 router isis [area tag]Enable the IS-IS routing for the specified routing process and enter IS-IS
routing configuration mode.
(Optional) Use the area tag argument to identify the area to which the IS-IS
router is assigned. You must enter a value if you are configuring multiple
IS-IS areas.
The first IS-IS instance configured is Level 1-2 by default. Later instances
are automatically Level 1. You can change the level of routing b y using the
is-type global configuration command.
Step 4 net network-entity-title Configure the NETs for the routing process. If you are configuring
multiarea IS-IS, specify a NET for each routing process. You can specify a
name for a NET and for an address.
Step 5 is-type {level-1 | level-1-2 |
level-2-only}(Optional) You can configure the router to act as a Level 1 (station) rou ter,
a Level 2 (area) router for multi-area routing, or both (the default):
• level-1—act as a station router only
• level-1-2—act as both a station router and an area router
• level 2—act as an area router only
Step 6 exit Return to global configuration mode.
Step 7 interface interface-id Specify an interface to route IS-IS, and enter interface configuration mode.
If the interface is not already configured as a Layer 3 interface, enter the no
switchport command to put it into Layer 3 mode.
Step 8 no shutdown Enable the interface if necessary. By default, UNIs and ENIs are disabled
and NNIs are enabled.
Step 9 ip router isis [area tag]Configure an IS-IS routing process for ISO CLNS on the interface and
attach an area designator to the routing process.
Step 10 clns router isis [area tag]Enable ISO CLNS on the interface.
Step 11 ip address ip-address-mask Define the IP address for the interface. An IP address is required on all
interfaces in an area enabled for IS-IS if any one interface is configured for
IS-IS routing.
Step 12 end Return to privileged EXEC mode.