<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Lincoln,<div>The optical switches still exist for 10GE customers. They pretty much reused their existing Brocade platform except for larger core switches (what was possible changed when they moved to VPLS).</div><div><br></div><div>I'd forgotten about the VSRP stuff - Henk's preso from APRICOT2010 explains it all:</div><div><br></div><div><a href="http://meetings.apnic.net/__data/assets/pdf_file/0010/18856/APOPS-Plenary-2_AMS-IX-Generation-4-MPLSVPLS-experiences-_Henk-Steenman.pdf">http://meetings.apnic.net/__data/assets/pdf_file/0010/18856/APOPS-Plenary-2_AMS-IX-Generation-4-MPLSVPLS-experiences-_Henk-Steenman.pdf</a></div><div><br></div><div>Certainly the migration was fairly smooth - we didn't notice really.</div><div><br></div><div>MMC</div><div><br></div><div><br><div><div>On 10/09/2010, at 12:40 PM, Lincoln Dale wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><br>On 10/09/2010, at 12:31 PM, Matthew Moyle-Croft wrote:<br><br><blockquote type="cite">One of the more interesting applications I've seen of VPLS is for building big IXes.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">AMS-IX has migrated entirely to a VPLS network. It appears to be much more stable and resilient than a spanning-tree based network. Given that AMS-IX peaks at around 1Tbps of traffic and has 649 or so ports - it's a pretty good indication of the scale you can go for a single domain. <br></blockquote><br><br>AMS-IX wasn't STP based - well - it was once, but we're talking 2003/2004 timeframe, i.e. not for ages.<br><br>prior to migrating to VPLS, they used a combination of optical cross-connect (Glimmerglass photonic switch) and Foundry/Brocade's proprietary VSRP which effectively meant they built out redundant A/B networks and optically switched between the two.<br>migrating to VPLS solved some of the unique scaling challenges that they had with the architecture they had.<br><br><br>TRILL/Rbridges would have been ideal for AMS-IX but for the fact that it wasn't yet close enough in terms of shipping product to meet their required timeframes given the continued growth trajectory of traffic & 10G ports.<br>likewise the optical transceiver form factor preferred for large-port-count 10G switches (SFP+) don't yet provide 10G DWDM connectivity which they also required since they are spread out over multiple physical locations with limited dark fiber between sites.<br><br>business/timing reasons aside, it is a demonstration of how a single L2 domain can scale to Tbps of traffic.<br><br><br><blockquote type="cite">Admittedly IXes are a bit special in terms of needs (ie. single mac per customer with filters).<br></blockquote><br>certainly there are unique requirements to IXes.<br><br><br><br>cheers,<br><br>lincoln.<br><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" color="#144FAE"><br></font></font></div></blockquote></div><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="font-size: 12px; "><div><span class="Apple-style-span" style="font-size: medium;"><br></span></div></span></div></div></div></div></body></html>