<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Radia must have listened, she co-authored the problem statement for Trill<div><a href="http://datatracker.ietf.org/doc/rfc5556/">http://datatracker.ietf.org/doc/rfc5556/</a></div><div><a href="http://datatracker.ietf.org/doc/rfc5556/"></a>Thanks for the poem,</div><div>Ric<br><div><div>On 30/06/2010, at 6:32 PM, Narelle wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On Wed, Jun 30, 2010 at 3:04 PM, Lincoln Dale <<a href="mailto:ltd@cisco.com">ltd@cisco.com</a>> wrote:<br><blockquote type="cite">On 30/06/2010, at 1:00 PM, Andrew Fort wrote:<br></blockquote><blockquote type="cite"><blockquote type="cite">What's your view on TRILL?<br></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Rbridges - Layer 2 Forwarding Based on Link State Routing - what isn't there to like about that? :)<br></blockquote><br><br>I'll echo that one. I have seen *major* spanning tree problems in data<br>centres, campuses and across exchanges. In the Olden Days we used to<br>get them due to faulty bridges, and more recently from bugs/tricky<br>configs due to link aggregation. They are the hardest things to locate<br>and often it seems that ultimately all you did was wave the proverbial<br>dead chicken, ie you pulled a card somewhere and the darn thing<br>converged...<br><br>Actually I remember a classic conversation a while back with Radia<br>Perlman (she invented it) about how unsuitable I thought it was for<br>MANs... she agreed wholeheartedly!<br><br>Might be time for some poetry to sooth our souls...<br><br>Algorhyme<br><br>I think that I shall never see<br>A graph more lovely than a tree.<br>A tree whose crucial property<br>Is loop-free connectivity.<br>A tree that must be sure to span<br>So packets can reach every LAN.<br>First, the root must be selected.<br>By ID, it is elected.<br>Least-cost paths from root are traced.<br>In the tree, these paths are placed.<br>A mesh is made by folks like me,<br>Then bridges find a spanning tree.<br>—Radia Perlman<br><br><br><br><br><br>Cheers<br><br><br>-- <br><br><br>Narelle<br><a href="mailto:narellec@gmail.com">narellec@gmail.com</a><br>_______________________________________________<br>AusNOG mailing list<br>AusNOG@lists.ausnog.net<br>http://lists.ausnog.net/mailman/listinfo/ausnog<br></div></blockquote></div><br></div></body></html>