[c-nsp] OSPF fast convergence

Phil Mayers p.mayers at imperial.ac.uk
Thu May 14 06:13:44 EDT 2009

Justin Shore wrote:
> Phil Mayers wrote:
>> Common advice seems to be to make actual link-loss detection fast, in 
>> preference to using BFD. That said, I know some people use BFD.
>> Assuming you're using LAN cards, you may want to see if you can make 
>> router links as routed rather than SVI interfaces. Though routed 
>> interfaces are implemented internally as VLANs, presentations I saw from 
>> Cisco claim that this:
> I prefer to use BFD personally.  Link failure detection without BFD will 
> be slow no matter what you do.  FRR doesn't gain you much if it takes 
> you several seconds to realize that a link dropped.

Seconds? Wow. I'm curious - under what circumstances are you seeing such 
length link-loss detection times?

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