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endpoint liveness (RE: Do ATM-based Exchange Points make sense anymore?)

  • From: Lane Patterson
  • Date: Fri Aug 09 18:24:12 2002

BGP keepalive/hold timers are configurable even down to granularity 
of link or PVC level keepalives, but for session stability reasons, 
it appears that most ISPs at GigE exchanges choose not to
tweak them down from the defaults.  IIRC, Juniper is 30/90 and Cisco is
60/180.  My gut feel was that even something like 10/30 would be 
reasonable, but nobody seems compelled that this is much of an
issue.

Cheers,
-Lane

-----Original Message-----
From: Petri Helenius [mailto:pete@he.iki.fi]
Sent: Friday, August 09, 2002 3:07 PM
To: Mikael Abrahamsson; nanog@merit.edu
Subject: Re: Do ATM-based Exchange Points make sense anymore?




> What functionality does PVC give you that the ethernet VLAN does not?
>
Thatīs quite easy. Endpoint liveness. A IPv4 host on a VLAN has no idea
if the guy on the "other end" died until the BGP timer expires.

FR has LMI, ATM has OAM. (and ILMI)

Pete





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