The inetcolor routing table is not instantiated, even though the Flex-Algo configuration appears correct and ISIS flex-algorithm SPF is functioning. This issue is commonly observed when link delay measurement is not working due to misconfigured or blocked TWAMP sessions.

The inetcolor.<color-id> table is not created on any routers.

show isis database flex-algo shows correct participation and FAD details.

show isis route flex-algorithm-id <id> displays no routes.

show isis spring flex-algorithm <id> shows:

• "links failed constraints" > 0
• "links passed constraints" = 0

>show services rpm twamp client probe-results
TWAMP probe results show 100% packet loss. 

Ensure that TWAMP is properly configured and operational on all devices participating in the Flex-Algo topology.

#set services rpm twamp server authentication-mode none

#set services rpm twamp server light

>show services rpm twamp client probe-results