Is-Is Interfaces; Tag Is-Is Interface Routes - Cisco NCS 5500 Series Configuration Manuals

IS-IS Interfaces

Enables IS-IS routing for the specified routing process, and places the router in router configuration mode. In this example,
the IS-IS instance is called isp.
Step 3
address-family { ipv4 | ipv6 } [ unicast ]
Example:
RP/0/RP0/CPU0:router(config-isis)# address-family ipv4 unicast
Specifies the IPv4 or IPv6 address family, and enters router address family configuration mode.
Step 4 metric-style wide [ transition ] [ level { 1 | 2 }]
Example:
RP/0/RP0/CPU0:router(config-isis-af)# metric-style wide level 1
Configures a router to generate and accept only wide-link metrics in the Level 1 area.
Step 5 spf prefix-priority [ level { 1 | 2 }] { critical | high | medium } { access-list-name | tag tag }
Example:
RP/0/RP0/CPU0:router(config-isis-af)# spf prefix-priority high tag 3
Installs all routes tagged with the value 3 first.
Step 6 commit
IS-IS Interfaces
IS-IS interfaces can be configured as one of the following types:
• Active—advertises connected prefixes and forms adjacencies. This is the default for interfaces.
• Passive—advertises connected prefixes but does not form adjacencies. The passive command is used to
• Suppressed—does not advertise connected prefixes but forms adjacencies. The suppress command is
• Shutdown—does not advertise connected prefixes and does not form adjacencies. The shutdown command

Tag IS-IS Interface Routes

This optional task describes how to associate a tag with a connected route of an IS-IS interface.
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
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configure interfaces as passive. Passive interfaces should be used sparingly for important prefixes such
as loopback addresses that need to be injected into the IS-IS domain. If many connected prefixes need
to be advertised then the redistribution of connected routes with the appropriate policy should be used
instead.
used to configure interfaces as suppressed.
is used to disable interfaces without removing the IS-IS configuration.
Implementing IS-IS