nanog mailing list archives

Re: how to waste fiber (was:OT:MarketSpeak)


From: William Allen Simpson <wsimpson () greendragon com>
Date: Wed, 13 Oct 1999 12:07:01 -0400


Sam Thomas wrote:
semi-operational: in the event that path inside a SONET ring switches
from active to protect and back, etc...does this generally show up on a
a router as a series of errors, an interface bounce, or not at all?


Often both.  The switch is spec'd at 50 milliseconds.  Hardly a twitch
in human voice perception, but a heck of a lot of bad PPP checksums
in machine perception.

Worse, in my miserable experience, the APS would flip back and forth.
It's not supposed to, but it has.  I firmly recommend: do not pay for 
APS.  Put the money toward diverse paths.  As usual, Paul Vixie has got 
it right!

WSimpson () UMich edu
    Key fingerprint =  17 40 5E 67 15 6F 31 26  DD 0D B9 9B 6A 15 2C 32




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