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aussie-isp /
1997-05
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Date: Thu, 01 May 1997 11:51:14 +1000
From: Geoff Huston To: aussie-isp Message-Id: <3.0.1.32.19970501115114.006cbbb4@nico.aarnet.edu.au> In-Reply-To: <199704301005.UAA13851@sydney.healey.com.au> Subject: Re: [Oz-ISP] BGP again... |
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Anthony, I've no intention to respond publically over the ozisp mailer to this query. If you are seeking Telstra Internet's advice on this as a client of Telstra Internet then you'll need to email me directly with your query as it relates to our services. thanks, Geoff Huston At 08:05 PM 30/4/97 +1000, Antony wrote: >[Apologies if you get this twice] > >Hi > >This is a query about BGP4 routing, so if it isn't your field, please delete >this email with my apologies. This is fairly long, but I would appreciate >any help, I am very new to BGP. > >Ok, I've now gone over some documentation about BGP4 (thanks Chris) and am >feeling a little more confident about all of this. > >I'll go over the senario (quickly) again. We multi-home into Connect.com.au >and Telstra Internet. CCA is our larger link and I prefer most of the data >to come in over that link. > >Currently we do not have an AS number, but I'll get one. > >My problem is that since I had to ask TIS to stop advertising our main >Class C (almost _all_ incoming data was coming in via our smaller TIS link), >we've not received anything at all over the TIS link. > >The TIS link is mostly there for news and cache hits, but I'd like any TIS >connected sites (except MCI) to come in over that link also. > >Am I correct in assuming that if I advertise our Class C (203.10.124/24) to >both CCA and TIS, it'll just choose whichever path it sees at the shortest >AS-path. If that is right, then we end up with the problem we had before of >_alot_ of data coming in from MCI, via the smaller TIS link. > >I've drawn a connectivity diagram below.... > >AS4000 AS701 >+---------+ +---------+ +---------+ >| GSL | | UUNET | | MCI | AS3561 >+----+----+ +----+----+ +----+----+ > |_____. ._____| | > | | | > +--+---+--+ +----+----+ >AS4174 | Connect |-----------------------------| Telstra | A1221 > +----+----+ +----+----+ > | | > | | > +------------\ /------------+ > \ / > +-+---------+-+ > | Healey | ASxyz > +-------------+ > >Here's what I was thinking..... > >! Allow only TIS connected clients (NOT MCI) on our TIS link >ip as-path access-list 10 deny _3561_ >ip as-path access-list 10 permit _1221_ >ip as-path access-list 10 deny .* > >! Allow everything on our CCA link >ip as-path access-list 20 permit .* >ip as-path access-list 20 deny .* > >This should allow anything on AS1221 (TIS) to come in over our TIS link, >except for MCI, which should route over our CCA link. TIS data shouldn't >route over CCA (as it does now) since, with us directly advertising our AS >to TIS, it'll have a shorter AS-path. >["ASxyz AS1221" as opposed to "ASxyz AS4174 AS1221"] > >Before I go dashing off to buy another router, I was thinking a Cisco2503 >(16 meg), I'd like to know if all this is actually possible. It seems a >little strange to be a 3rd tier provider (thru CCA) and a 2nd tier provider >(through TIS) at the same time but that's what has now happened. > >Any thoughts, comments, vodka's and orange would be appreciated. > >Regards, >Antony. > >------------------------------------------------------------------------------ > Antony Healey ISOC-AU Founding Member Ph: +61 2 9893 1883 > General Manager Fax: +61 2 9893 1884 > Healey Communications Australia -- Giving you the world... >------------------------------------------------------------------------------ >---- >Email "unsubscribe aussie-isp" to m a j o r d o m o @ a u s s i e . n e t to be removed. >Reminder: posts to list only accepted from your subscribed email address > > > ---- Email "unsubscribe aussie-isp" to m a j o r d o m o @ a u s s i e . n e t to be removed. Reminder: posts to list only accepted from your subscribed email address |
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