Ok , Sorry I misunderstood So , I think combining both BFD and LFA will do the required failover time But why changing the hello-time on both interfaces (the link between R1 and R2) will not affect ?
BR, Mohammad > Date: Thu, 28 May 2015 12:53:35 +0100 > From: [email protected] > To: [email protected]; [email protected] > Subject: Re: [c-nsp] OSPF per-prefix LFA > > This has nothing to do with OSPF virtual links. I'm talking about the > virtual ethernet interfaces defined in your virtual lab. > > You can test out whether it's doing what I suggested by changing the > hellotime value on the relevant interfaces. > > Nick > > On 28/05/2015 12:50, Mohammad Khalil wrote: > > Hi Nick and thanks for the reply > > All my routers are participating in area 0 , no virtual-link in place > > I shutdown the interface connected to R2 (from CSR or R1 side) > > > > BR, > > Mohammad > > > >> Date: Thu, 28 May 2015 12:36:50 +0100 > >> From: [email protected] > >> To: [email protected]; [email protected] > >> Subject: Re: [c-nsp] OSPF per-prefix LFA > >> > >> 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 > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
