[c-nsp] OSPF per-prefix LFA

[Nick Hilliard]

On 28/05/2015 12:24, Mohammad Khalil wrote:
> When I shutdown the interface with R2 (as I do not want to turn off the
> remote interface on R2 as I cannot turn on BFD on GNS3) and I have
> checked the route to 2.2.2.2 , it took about 5-6 seconds to install the
> same route via the backup path (via R3)

did you try this by shutting down both sides of the virtual link at the
same time?  The remote side will not detect carrier loss on a virtual link,
so ospf failover will be detected by according to the ospf deadtime.

If you handle this with bfd, the failover time should be much faster.  Last
time I measured this (me3600/100ms bfd), the failover time for l2vpn lsp
rerouting was reliably less than 400ms.  I.e. the failover for regular ip
service should be a little less.

Nick