OPS: BGP spew from ASN 7374
ASN 7374 appears to be announcing most of the Internet through the CIX. Could whoever their upstream provider is supposed to be, please contact them. Cisco: could we please have more config memory, so we can load access-lists for even huge BGP peers? -- Sean Donelan, Data Research Associates, Inc, St. Louis, MO Affiliation given for identification not representation
ASN 7374 appears to be announcing most of the Internet through the CIX. Could whoever their upstream provider is supposed to be, please contact them.
I do believe the following people transit them (at least): * i216.49.0.0/18 194.143.165.210 100 0 4565 7374 i * 192.41.177.3 100 0 7018 7374 i * 192.41.177.86 100 0 4565 7374 i * 192.41.177.86 100 0 4565 7374 i *> 192.41.177.2 650 100 0 1 7374 i * 192.41.177.86 100 0 4565 7374 i * 192.41.177.104 100 0 2041 6939 6939 6939 7374 i -- Alex Bligh GX Networks (formerly Xara Networks)
This should probably be moved to cisco-nsp if it gets any more in-depth, however:
Cisco: could we please have more config memory, so we can load access-lists for even huge BGP peers?
Although you're probably asking for exactly what you say, config memory, it might also be useful to use prefix-lists to filter routing announcements: http://www.academ.com/nanog/june1998/turner/sld014.htm and the notes on bug CSCdk93005 seem to indicate that prefix-lists do make a difference and should be used over access-lists for filtering routes... Hope that helps, Adi
I've had a question on this for some time that maybe can get answered here. Let's assume for a moment that I have a network of 209.123/18 (1/4 of a classful B). Let's further assume that my upstream filters me with: access-list 2002 permit ip host 209.123.0.0 host 255.255.0.0 neigh 2.3.4.5 distrib 2002 in Will my /18 announcement make it through this /16 filter? Would the same be true with a prefix-length filter, which I assume the syntax would be: ip prefix-list 1 permit 209.123.0.0/16 neigh 2.3.4.5 prefix-list 1 in Thanks. On Wed, 7 Apr 1999, R.P. Aditya wrote:
This should probably be moved to cisco-nsp if it gets any more in-depth, however:
Cisco: could we please have more config memory, so we can load access-lists for even huge BGP peers?
Although you're probably asking for exactly what you say, config memory, it might also be useful to use prefix-lists to filter routing announcements:
http://www.academ.com/nanog/june1998/turner/sld014.htm
and the notes on bug CSCdk93005 seem to indicate that prefix-lists do make a difference and should be used over access-lists for filtering routes...
Hope that helps, Adi
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Atheism is a non-prophet organization. I route, therefore I am. Alex Rubenstein, alex@nac.net, 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 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
On 8 Apr 99, at 4:14, alex@tempest.nac.net wrote:
Would the same be true with a prefix-length filter, which I assume the syntax would be:
ip prefix-list 1 permit 209.123.0.0/16 neigh 2.3.4.5 prefix-list 1 in
With the prefix list it would have to be an exact match using the above. To accept more specifics within that block, you would do something like... ip prefix-list 1 permit 209.123.0.0/16 ge 16 neigh 2.3.4.5 prefix-list 1 in Mike -- Mike Hughes - Network Services mike@dircon.net Tel: +44 181 297 0300 http://www.dircon.net/ Fax: +44 181 463 9820 "We don't see things as they are, we see things as we are"
On Wed, 7 Apr 1999, Sean Donelan wrote:
ASN 7374 appears to be announcing most of the Internet through the CIX.
They fixed it.
Could whoever their upstream provider is supposed to be, please contact them.
Done. Mike. +------------------- H U R R I C A N E - E L E C T R I C -------------------+ | Mike Leber Direct Internet Connections Voice 408 282 1540 | | Hurricane Electric Web Hosting & Co-location Fax 408 971 3340 | | mleber@he.net http://www.he.net | +---------------------------------------------------------------------------+
participants (6)
-
Alex Bligh -
alex＠tempest.nac.net -
Mike Hughes -
Mike Leber -
R.P. Aditya -
Sean Donelan