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Re: So -- what did happen to Panix?
From: sandy () tislabs com
Date: Fri, 27 Jan 2006 17:07:40 -0500 (EST)


Todd Underwood wrote:

you're probably right (as usual).  but it seems that if you delay
acceptance of announcements with novel origination patterns, you don't
harm very many legitimate uses.  in particular, ASes changing
upstreams won't be harmed at all.  people moving their prefix to a new
ISP will have a fixed delay in getting their announcement propagated,
sure.  but they already have this delay now.  

they tell the new ISP:  'announce my prefix' and the new ISP says
'prove it's yours'.  they do that for a couple of emails.  then the
new ISP asks it's upstreams to accept that announcement.  that takes a
little while (ranging from 4 to 72 hours in my recent experience).

This is great for the planned changes, but real-time changes to
respond to Internet dynamics won't work well with such delays.  If you
are multi-homed to provide a backup, you would like for it to respond
more quickly than 4-72 hours, I'll bet.  So if you have PI space but not
your own AS, your backup route would look like a novel origination,
but you sure wouldn't want it delayed.

How common are such cases?  Should the solutions cover them also?
Should there be special procedures to deal with special cases?
Etc.

--Sandy


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