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Catalyst 3750 Metro Switch Software Configuration Guide
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Chapter 28 Configuring IP Unicast Routing
Configuring ISO CLNS Routing
Default ISO IGRP Configuration
Table 28-5 shows the default ISO IGRP configuration.
Enabling ISO IGRP
To configure ISO IGRP dynamic routing, you must enable the ISO IGRP routing process, identify the
address for the router, and specify the interfaces that are to route ISO IGRP. Optionally, you can set a
level for your routing updates when you configure the interfaces. CLNS routing is enabled by default on
routers when you configure ISO IGRP. You can specify up to ten ISO IGRP routing processes.
Beginning in privileged EXEC mode, follow these steps to enable ISO IGRP:
Table 28-13 Default ISO IGRP Configuration
Feature Default Setting
Metric weights Type of service (ToS): 0
Metric constants: k1: 1, k2: 0, k3: 1, k4: 0, k5: 0
Timers Update interval: 90 seconds.
Invalid interval: 135 seconds.
Holddown interval: 145 seconds.
Split horizon Enabled.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
clns routing Enable ISO connectionless routing on the switch.
Step 3
router iso- igrp [tag] Enable the ISO IGRP routing process and enter router configuration mode.
(Optional) Assign a meaningful name (tag) for the routing process.
Step 4
net network-entity-title Configure the NET or address for the routing process. You can configure
only one NET per routing process.
Enter the NET or process in the format XX.XXXX. ... .XXX.XX
Step 5
exit Return to global configuration mode.
Step 6
interface interface-id Specify an interface to route ISO IGRP 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 7
clns router iso-igrp [[tag] [level 2]] Enable ISO IGRP on the specified interface.
• (Optional) tag—routing process name.
• (Optional) Set the routing type (level 2) for routing updates. When
selected, this option reduces the amount of router-to-router traffic
because the interface sends out only Level 2 routing updates and does
not pass on Level 1 information.
Step 8
exit Return to global configuration mode.
Repeat steps 5 and 6 to enable ISO IGRP on other interfaces.
Step 9
end Return to privileged EXEC mode.