I know this is not the cisco list, but I'm sounding a warning. We had a bad, bad, BAD experience with BGP peer groups recently, which cisco are coming in to discuss. Symptoms are your outgoing AS filter lists will not work with *some* peers! This can look really confusing if, like us, you rely on a local peer-session to do sanity checking of your filter-lists and it shows everything is OK. Version is: Cisco Internetwork Operating System Software IOS (tm) GS Software (RSP-JV-M), Version 11.1(6), RELEASE SOFTWARE (fc1) Copyright (c) 1986-1996 by cisco Systems, Inc. cisco RSP2 (R4600) processor with 131072K bytes of memory. R4700 processor, Implementation 33, Revision 1.0 I've talked to at least one other provider who has experienced similar problems. I've yet to see a bug report from cisco on this, but would appreciate any comments from other folks who see similar behaviour (directly to me, I'll summarize). Oh, and this problem can take several days to manifest itself, and it seems to have impeccable timing :-) Mark