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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Strange BGP announcement.
core1.brd>sho ip bgp reg _0_ returns about 30 routes, like: Network Next Hop Metric LocPrf Weight Path *d 204.255.24.0 207.106.96.5 0 8001 8001 4969 1239 11606 0 0 i *d 204.255.25.0 207.106.96.5 0 8001 8001 4969 1239 11606 0 0 i [[email protected] /]# whois -h rs.arin.net 11606 Warwick Online (ASN-WOL-AS) 47 Main Street Warwick, New York 10990 USA Autonomous System Name: WOL-AS Autonomous System Number: 11606 This is a independant telephone company in northern nj / sourthern NY state. core1.brd>sho ip bgp 204.255.24.0 BGP routing table entry for 204.255.24.0/24, version 4903495 Paths: (4 available, best #3, advertised over IBGP, EBGP) 8001 8001 4969 1239 11606 0 0, (suppressed due to dampening) 207.106.96.5 from 207.106.96.5 Origin IGP, localpref 100, valid, external Community: 0:666 1:58376 4969:609 8001:666 8001:4969 Dampinfo: penalty 7270, flapped 22 times in 00:38:24, reuse in 00:49:10 6347 701 11606 209.83.160.97 from 209.83.160.97 (209.83.159.2) Origin IGP, localpref 100, valid, external, best Community: 8001:666 8001:6347 On Sun, 8 Nov 1998, Craig A. Huegen wrote: > A friend showed me several routes with path "1239 11606 0 0 i". > > My guess is that these are causing problems too. > > --- > Connected to sl-warwick-1.sprintlink.net. > Escape character is '^]'. > > > Bay Networks, Inc. and its Licensors. > Copyright 1992,1993,1994,1995,1996,1997,1998. All rights reserved. > --- > > It's a Bay -- I know that Bays will allow you to configure an AS prepend > of "0" -- wonder if that's what's happening. > > /cah > > > On Sun, Nov 08, 1998 at 04:06:56PM -0500, Dave Curado wrote: > ==>> Since this isn't directly my upstream's problem I've edited them out of the > ==>> log (actually, this could have come from more than one of my upstreams) > ==>> > ==>> Nov 8 17:45:26 BGP RECV x.x.x.x+179 -> x.x.x.x+1161 > ==>> Nov 8 17:45:26 BGP RECV message type 2 (Update) length 64 > ==>> Nov 8 17:45:26 BGP RECV flags 0x40 code Origin(1): Incomplete > ==>> Nov 8 17:45:26 BGP RECV flags 0x40 code ASPath(2): (0x02 0x07 0x0f 0x7f 0x02 0xbd 0x0d 0xa5 0x03 0x30 0x03 0x2f 0x03 0x2e) > ==>> Nov 8 17:45:26 BGP RECV flags 0x40 code NextHop(3): x.x.x.x > ==>> Nov 8 17:45:26 BGP RECV flags 0xc0 code Aggregator(7): 6218 206.53.128.254 > ==>> Nov 8 17:45:26 BGP RECV 206.148.144/22 > ==>> Nov 8 17:45:26 > ==>> Nov 8 17:45:26 bnp_path_attr_eer: peer x.x.x.x (External AS yyyy) bad update send NOTIFY flag 0 type 0 err_subcode 11, data 0 > ==>> Nov 8 17:45:26 NOTIFICATION sent to x.x.x.x (External AS yyyy): code 3 (Update Message Error) subcode 11 (AS path attribute problem) data > ==>> Nov 8 17:45:26 > ==>> Nov 8 17:45:26 BGP SEND x.x.x.x+1161 -> x.x.x.x+179 > ==>> Nov 8 17:45:26 BGP SEND message type 3 (Notification) length 21 > ==>> Nov 8 17:45:26 BGP SEND Notification code 3 (Update Message Error) subcode 11 (AS path attribute problem) > ==>> Nov 8 17:45:26 > ==>> > ==>> (We saw the problem start around 1640 GMT tonight) > ==>> > ==>> Problem at AS6218 perhaps ? (of course if this is the result of some > ==>> random corruption that can't be relied on... ) > ==>> > ==>> Anyone else see anything ? > ==> > ==>Another note on this, I wasn't able to stop the updates > ==>with a filter-list... perhaps because the AS path is > ==>problematic. I had to use a distribute list instead, listing > ==>each of the networks that 6218 is aggregating for... > ==>Not sure if this affects anyone else or not, but: > ==> > ==>access-list 21 deny 206.53.128.0 0.0.3.255 > ==>access-list 21 deny 206.53.128.0 0.0.0.255 > ==>access-list 21 deny 206.53.129.0 0.0.0.255 > ==>access-list 21 deny 206.53.130.0 0.0.0.255 > ==>access-list 21 deny 206.53.131.0 0.0.0.255 > ==>access-list 21 deny 206.148.144.0 0.0.3.255 > ==>access-list 21 deny 206.190.224.0 0.0.0.255 > ==>access-list 21 permit any > ==> > ==>davec > ==> > -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Atheism is a non-prophet organization. I route, therefore I am. Alex Rubenstein, [email protected], KC2BUO, ISP/C Charter Member Father of the Network and Head Bottle-Washer Net Access Corporation, 9 Mt. Pleasant Tpk., Denville, NJ 07834 Don't choose a spineless ISP; we have more backbone! http://www.nac.net -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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