RE: BGP Peering and Prefix filterin Question

["Paul Stewart" <pstewart () nexicomgroup net>]

hi there...

Who would have the time to monitor this if it was a manual process? ;)

Personally, never heard of that but it may happen out there....

We use strict RADB filtering on 95% of our connections.  Once a day, we
run a copy of IRRPT against a list of peered AS's and update the
prefix-lists

For transit, we just sanitize the routes (drop private space, drop small
subnets etc.)

Take care,

Paul


________________________________

From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of
Jim McBurnett
Sent: Monday, October 29, 2007 2:15 PM
To: nanog () nanog org
Subject: BGP Peering and Prefix filterin Question



Hello,

Recently I have been told that some ISP's are automatically or maybe
manually modifying their BGP inbound prefix listing after a network is
not advertised to them for a period of time.



So the questions I pose to the group:

1.       Is this normal?

2.       Can anyone share your policies?

3.       Who does it?

4.       How often?

5.       Is it automagic? Or the dirty work slaved off to the junior
engineer in the corner somewhere?

a.       I know you probably won't trust that junior engineer, but some
do....



Anyway just a little research after a small problem a customer recently
had.





Thanks,

Jim






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