nanog mailing list archives

Re: "Neighbor maximum-prefix" option on routers


From: "Daniele Arena" <daniele.arena () gmail com>
Date: Mon, 20 Nov 2006 12:45:37 +0100


Let alone how many operators monitor sessions down for
prefixes -- some ISPs deserve to be depxxxxx when they find
out after one month (been there, more than once) the
sessions are down, and they ask you why those are down,
cutting and pasting the 'Idle (pfxcount)' in their email
even. That is my personal view though.

So max-prefix is good for peers, maybe for customers, hardly
for transit sessions, and whenever you do it, MONITOR IT ;)=)
A three- line perl / sh script on top of your syslog or during
logrotate or so is advised if only that.

The "restart" option of maximum-prefix (which is available at list on
Cisco) should solve that, since it tries to restart the session every
n minutes to see if the prefixes are back to normal. But then again,
not everyone uses it...

Regards,

Daniele.


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