[c-nsp] ISIS BFD not Supported on CRS-3 ?

Pshem Kowalczyk pshem.k at gmail.com
Sat Feb 2 21:19:01 EST 2013


On 2 February 2013 07:30, Amos Thong <amosthy at hotmail.com> wrote:

> Hi C-NSP Members,
> We are a service provider running Cisco CRS-3 in our IP/MPLS core. Due to
> protection, we have recently added another 10Gbps
> link connecting 2 Cisco CRS-3 core routers, namely CR-A and CR-B. The
> config below are on CR-A and CR-B has similar config.
> Question :
> 1. Is this a known issue that BE interface does not support BFD ?
> 2. Without BFD link failure detection at ISIS level is going to be slower
> and we perceive that the convergence speed will fall back to ISIS native
> convergence speed ?
> 3. Is (2) the worst case and or is there any else that tend to fail ?
> We are looking forward to any members who has this environment to share
> their experience in this area. Thanks.

Not exactly CRS-3, but in one deployment of ASR9k with Eth-Bundles we've
used both WANPHY and OTU2e  in order to speed up link error detection. From
what we've gathered for single (non-bundle) links WANPHY and OTN2e is
always faster and what's more important can start the switchover when
errors reach certain level, not after the link failed completely.

kind regards

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