--On Wednesday, August 27, 2003 9:36 AM -0400 Leo Bicknell <bicknell@ufp.org> wrote:
In a message written on Wed, Aug 27, 2003 at 12:15:18AM -0400, John Payne wrote:
If this is true, then why do the european NAP mailing lists (which push IRR filtering) have an almost constant stream of "oops, our customer announced everything to us and we leaked it".
Because European naps have more smaller and clueless players. I know more than a few people (because they ask for peering) who have an IRR entry that is 1 prefix for the "ISP", and 1 prefix for their only BGP customer. It should be of no surprise they get that customer configured wrong. It should also be of no surprise that most of the real ISP's would never consider peering with those types of networks.
CAIS (or whatever they're called today - BtNAccess/PCCW) is a small and clueless player? Then why is 6461 peering with 3491?
(yeah, that was a customer route leak in July. I tend to just delete such emails, but I'd be surprised if there weren't more in August from ISPs that don't fit into "small and clueless")
there have been leaks by some large networks "tier1" if you like you dont know what caused the route leaks tho.. eg modifying cisco route-maps and filters by deleting and re-adding opens a small window of opportunity in which a lot of announcements get through, if your CLI pauses during this window or something causes you to be disconnected its instant route leak i quote the above as i know of more than one occasion where this has occured to bad consequences you can think of others eg the filter building script has a bug in it etc etc better to try and fail than to not try at all imho
Not everyone filters their customers, and saying that everyone that counts does doesn't make it so.
6461 filters all customers by prefix list. Note too, filtering customers does not eliminate route leaks, it just removes the most obvious and often cause.
Really? So how was I able to advertise a new netblock to one of your customers just now and see 6461 <their AS> <my AS> on route-views.oregon-ix.net within 2 minutes and without telling a soul what
good question, however as an ex-customer I know MFN do filter.. perhaps you're announcing that many that your being filtered on as-path of prefix count? try announcing something naughty and see if it goes thro eg rfc1918 or the block with windowsupdate on .. that should increase your traffic volume ;p Steve