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How are you configuring BFD timers?

He's asking because if it was dark the interface would go down when the link was lost and the router would pull routes. But PA to FL would lead me to believe it'll be a wave from some type of DWDM gear which brings us to BFD.

Luke Guillory
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-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Alex Lembesis
Sent: Wednesday, March 21, 2018 11:31 AM
To: Job Snijders (External); Youssef Bengelloun-Zahr
Subject: RE: How are you configuring BFD timers?

To speed up BGP routing convergence.  The (2x) dark fiber links from PA to FL are being used as Layer3 datacenter interconnects, where each datacenter has its own AS.  The DF is also carrying FCIP traffic, so we need failover to be as fast as possible.

Best regards,


-----Original Message-----
From: Job Snijders (External) [mailto:job at instituut.net]
Sent: Wednesday, March 21, 2018 12:25 PM
To: Youssef Bengelloun-Zahr
Cc: Alex Lembesis; NANOG
Subject: Re: How are you configuring BFD timers?

Silly question perhaps, but why would you do BFD on dark fiber?

Kind regards,


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