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Configuring Integrated IS-IS
IS-IS Interface Parameters Configuration Task List
IPC-279
Cisco IOS IP Configuration Guide
Enabling IP Routing for an Area on an Interface
To enable IP routing and specify the area for each instance of the IS-IS routing process, use the following
commands beginning in global configuration mode:
See the “IS-IS Configuration Examples” section at the end of this chapter for examples of configuring
IS-IS as an IP routing protocol.
IS-IS Interface Parameters Configuration Task List
The Cisco IS-IS implementation allows you to alter certain interface-specific IS-IS parameters. Most
interface configuration commands can be configured independently from other attached routers. The isis
password interface configuration command should configure the same password on all routers on a
network. The settings of other commands (isis hello-interval, isis hello-multiplier, isis
retransmit-interval, isis retransmit-throttle-interval, isis csnp-interval, and so on) can be different
on different routers or interfaces. However, if you decide to change certain values from the defaults, it
makes sense to configure them on multiple routers and interfaces.
To alter IS-IS parameters, perform the optional tasks described in the following sections:
• Configuring IS-IS Link-State Metrics (Optional)
• Setting the Advertised Hello Interval (Optional)
• Setting the Advertised CSNP Interval (Optional)
• Setting the Retransmission Interval (Optional)
• Setting the LSP Transmissions Interval (Optional)
• Setting the Retransmission Throttle Interval (Optional)
• Setting the Hello Multiplier (Optional)
• Specifying Designated Router Election (Optional)
• Specifying the Interface Circuit Type (Optional)
• Assigning a Password for an Interface (Optional)
• Limiting LSP Flooding (Optional)
Command Purpose
Step 1
Router(config)# interface interface-type
interface-number
Enters interface configuration mode.
Step 2
Router(config-if)# ip router isis [area tag]
Configures an IS-IS routing process for ISO Connectionless
Network Service (CLNS) on an interface and attaches an area
designator to the routing process.
Step 3
Router(config-if)# ip address ip-address-mask
Defines 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.