[c-nsp] IOS XR BFD

Nick 'tarantul' Novikov tarantul at gmail.com
Sat Jul 4 02:12:08 EDT 2009


On Fri, Jul 3, 2009 at 8:39 PM, Marc Binderberger<marc at sniff.de> wrote:
> Hello Nick,
>
> IOS-XR BFD does not support multihop yet, I think that's the reason they do
> not support iBGP.

Yep, but what if I have BGP session between IPs from subinterfaces
(special case, don't ask me why it was necessary to do so)? Old school
IOS allows enable BFD in this case, but XR no.


> If you think about iBGP between directly connected peers: have you tried it?
> The documentation may not cover this special case.

Yep.
RP/0/0/CPU0:cs1(config-bgp-nbr)#bfd fast-detect
RP/0/0/CPU0:cs1(config-bgp-nbr)#commit

% Failed to commit one or more configuration items during an atomic
operation, no changes have been made. Please use 'show configuration
failed' to view the errors
RP/0/0/CPU0:cs1(config-bgp-nbr)#show configuration failed
!! SEMANTIC ERRORS: This configuration was rejected by
!! the system due to semantic errors. The individual
!! errors with each failed configuration command can be
!! found below.


router bgp XXXX
 neighbor X.X.X.X
  bfd fast-detect
!!% Change would result in internal neighbor (X.X.X.X) with external-only config
 !
!
end



-- 
tarantul
Dios es Amor


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