Segment Routing v6 Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

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Segment Routing v6 Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

Configure SRv6 IS-IS

Updated: September 8, 2026

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Provides steps to enable SRv6 under an IS-IS IPv6 address family and associate a configured locator for advertising SRv6 locators and SIDs.

To enable SRv6 capabilities within the IS-IS routing protocol, allowing for the advertisement of SRv6 locators and SIDs.

Before you begin

Ensure that the IS-IS routing protocol is already configured on your router.
SRv6 locator must be defined before enabling SRv6 under IS-IS. Configure SRv6 locators.

Procedure

Enable SRv6 under the IS-IS IPv6 address-family and assign SRv6 locator to it.

Example:

Router(config)# router isis core
Router(config-isis)# address-family ipv6 unicast
Router(config-isis-af)# segment-routing srv6
Router(config-isis-srv6)# locator myLoc1
Router(config-isis-srv6-loc)# exit

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