Enabling Segment Routing for IS-IS Protocol
Segment routing on the IS-IS control plane supports the following:
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Level 1, level 2, and multi-level routing
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Prefix SIDs for host prefixes on loopback interfaces
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Adjacency SIDs for adjacencies
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MPLS penultimate hop popping (PHP) and explicit-null signaling
This task explains how to enable segment routing for IS-IS.
Before you begin
Your network must support the MPLS Cisco IOS XR software feature before you enable segment routing for IS-IS on your router.
Note |
You must enter the commands in the following task list on every IS-IS router in the traffic-engineered portion of your network. |
Procedure
Command or Action | Purpose | |||
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Step 1 |
configure |
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Step 2 |
router isis instance-id Example:
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Enables IS-IS routing for the specified routing instance, and places the router in router configuration mode.
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Step 3 |
metric-style wide [ level { 1 | 2 }] Example:
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Configures a router to generate and accept only wide link metrics in the Level 1 area. |
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Step 4 |
segment-routing mpls Example:
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Segment routing is enabled by the following actions:
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Step 5 |
exit Example:
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Step 6 |
commit |
What to do next
Configure the prefix SID.