User guide

Configuring IS-IS Configuring IS-IS
page 3-14 OmniSwitch AOS Release 7 Advanced Routing Configuration Guide March 2015
Configuring IS-IS
Configuring IS-IS on a router requires several steps. Depending on your requirements, you may need to
perform all the steps listed below.
By default, IS-IS is disabled on the router. Configuring IS-IS consists of the following tasks:
• Set up the basics of the IS-IS network by configuring the required VLANs and assigning ports to the
VLANs. This is described in “Preparing the Network for IS-IS” on page 3-15.
• Enable IS-IS. When the image file for advanced routing is installed, you must load the code and enable
IS-IS. The commands for enabling IS-IS are described in “Activating IS-IS” on page 3-15.
• Configure an IS-IS area ID. The commands to create areas and backbones are described in “Creating an
IS-IS Area ID” on page 3-16.
• Activate IPv6 or IPv4 routing in IS-IS. This is described in “Activate IPv4 or IPv6 Routing” on
page 3-16.
• Configure an IPv4/IPv6 IS-IS circuit on particular VLAN. This is used to enable IS-IS routing on a
particular VLAN. Creating IS-IS circuit is described in “Creating IS-IS Circuit” on page 3-16.
• Configure IS-IS levels. Routers are configured at different IS-IS levels. This is described in
“Configuring the IS-IS Level” on page 3-17.
• Enable summarization. Routes can be summarized on routers. This is described in
“Enabling Summarization” on page 3-18.
• Configure IS-IS authentication (optional). This is described in “Enabling IS-IS Authentication” on
page 3-19.
• Configure interface level parameters (optional). The commands to configure interface level parameters
are described in “Modifying IS-IS Circuit Parameters” on page 3-22.
• Create a redistribution policy and enable the same using route maps (optional). To create route maps,
see “Configuring Redistribution Using Route Maps” on page 3-23.
• Configure router capabilities (optional). There are several commands that influence router operation.
These are covered briefly in the table in “Configuring Router Capabilities” on page 3-30.
• Configure redundant switches for graceful IS-IS restart (optional). Configuring switches with
redundant switches for graceful restart is described in “Configuring Redundant Switches in a Stack for
Graceful Restart” on page 3-30.
At the end of the chapter is a simple IS-IS network diagram with instructions on how it was created on a
router-by-router basis. See “IS-IS Application Example” on page 3-31 for more information.