<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">A good place to find community defs is ONESC's page: <a href="http://www.onesc.net/communities/">http://www.onesc.net/communities/</a><div><br></div><div>MMC</div><div><br><div><div>On 03/08/2009, at 6:11 PM, Sean K. Finn wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Can you use AS2's communities (If they have any) to influence how they return traffic to AS1 ?<br><br>E.g. take a look at Jason Sinclair from Pipe Networks presentation from AUSNog last year on Communities.<br><a href="http://www.ausnog.net/media/images/ausnog-02/presentations/AusNOG02-Sinclair-BGP%20Communities.pdf">http://www.ausnog.net/media/images/ausnog-02/presentations/AusNOG02-Sinclair-BGP%20Communities.pdf</a><br><br>Community attributes stack, so you can tag AS1:community and AS2:community to influence how AS2 treats your routes, and yes it works multiple hops away, as long as any intermediaries aren't stripping community tags.<br><br>-S<br><br>-----Original Message-----<br>From: ausnog-bounces@lists.ausnog.net [<a href="mailto:ausnog-bounces@lists.ausnog.net">mailto:ausnog-bounces@lists.ausnog.net</a>] On Behalf Of Nick @ Deltaband<br>Sent: Monday, 3 August 2009 6:28 PM<br>To: <a href="mailto:ausnog@ausnog.net">ausnog@ausnog.net</a><br>Subject: [AusNOG] Asymmetric BGP question<br><br>Hi,<br><br>So i have this BGP problem...<br><br>Traffic going between AS1 and AS2 has an asymmetric path of latency and doom.<br><br>On the outbound path it goes something like this:<br><br>AS1 > Transit Provider(AS1) > Equinix Sydney > AS2 - Perfect all is<br>kept nicely on this side of the pacific.<br><br>The return path is like this:<br><br>AS2 > Transit Provider(AS1) > AS1 - The transit provider peers<br>directly with AS2. Great. The problem is, it's in the US. So the<br>traffic on the return path is laggy as hell because it's got to cross<br>the pacific twice.<br><br>You'd think AS2, that's predominately based in Australia, would be<br>localpref'ing routes learnt from Australian IX's over US IX's but I<br>guess they probably have their reasons not to.<br><br>My question is: Other than asking the transit provider for AS1 to add<br>an AS path prepend to the route being advertised to AS2 in the US, do<br>I have any other options?<br><br>MED would only work if the transit provider peered with AS2 directly<br>in Aus as well right? Rather than via Equinix?<br><br>Cheers,<br><br>Nick<br>_______________________________________________<br>AusNOG mailing list<br><a href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><br>http://lists.ausnog.net/mailman/listinfo/ausnog<br>_______________________________________________<br>AusNOG mailing list<br>AusNOG@lists.ausnog.net<br>http://lists.ausnog.net/mailman/listinfo/ausnog<br></div></blockquote></div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>-- <br>Matthew Moyle-Croft </div><div>Networks, Internode/Agile<br>Level 5, 162 Grenfell Street, Adelaide, SA 5000 Australia<br>Email: <a href="mailto:mmc@internode.com.au">mmc@internode.com.au</a> Web: <a href="http://www.on.net/">http://www.on.net</a><br>Direct: +61-8-8228-2909<span class="Apple-tab-span" style="white-space: pre; "> </span><span class="Apple-tab-span" style="white-space: pre; "> </span> Mobile: +61-419-900-366<br>Reception: +61-8-8228-2999 Fax: +61-8-8235-6909<br></div></div></span></div></span></div></span> </div><br></div></body></html>