Fast Re-Route or Autotunnel in real life

[superkliko]

Hi guys,

In real life implementation what is used mostly to backup the TE tunnels, fast re-reroute or autotunnel ? 

Thanks

[Vinit Jain · Accepted solution]

It totally depends on the design requirements. but most of the time we see implementation of TE with FRR. With Auto-Tunnels, the only challenge is, we need to ensure the subnets/IP Addresses to which TE Tunnels will be formed and B/W requirements as multiple tunnels could go over the same link. .

Hope that answers

Vinit

[superkliko]

Thank you Vinit,

For the last part of your answer what do you think could be a possible solution, maybe SRLG or flag attributes ?

[Vinit Jain]

For the last part, there are multiple things that can be done. one of them could be planning on the allocation through RSVP and carving out sub-pools. You can also look into Auto-B/W feature in TE.

With statically configured Tunnel, we already know how much b/w can be required by the TE Tunnels but again we carve out b/w out of the interface accordingly.

[superkliko]

Thanks for explanation