Symptom
In a SRv6 setup with Flex-algo enabled, router ISIS may crash (core dump) during de-configuring:
no router isis
Conditions
Router ISIS with SRv6 and Flex-algo:
router isis
address-family ipv6 unicast
segment-routing srv6
flex-algo
Flex-algo must be defined and active.
Workaround
There's no workaround.
Further Problem Description
Problem is timing sensitive and intermittent. It may not happen every time even when condition is met. This time racing issue can be difficult to reproduce.
Since crash happens during de-configuration of router isis (isis will no longer be running), impact should be minimal.
