[137465] in North American Network Operators' Group

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Packet over SONET failback

daemon@ATHENA.MIT.EDU (Jason Lixfeld)
Sun Feb 13 19:30:26 2011

From: Jason Lixfeld <jason@lixfeld.ca>
Date: Sun, 13 Feb 2011 19:29:16 -0500
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org

PoS failure detection happens in under 50ms, but what about the =
failback?  Same deal?  I ask because I've got two routers connected to =
opposite ends of a spare PoS link that I've been playing with and I'm =
noticing that the failback on the far side seems to be about 15 seconds =
(assuming the near side failover was initiated with an interface =
shutdown command and thusly no shut'd to re-enable the link).  Just =
wanted to know if a higher failback time is a relatively normal =
occurrence and maybe I'm seeing some sort of built-in hold down feature =
working away?=


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