<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">The low down;<div><br></div><div><a href="http://www.renesys.com/blog/2009/02/the-flap-heard-around-the-worl.shtml">http://www.renesys.com/blog/2009/02/the-flap-heard-around-the-worl.shtml</a></div><div><a href="http://www.renesys.com/blog/2009/02/longer-is-not-better.shtml">http://www.renesys.com/blog/2009/02/longer-is-not-better.shtml</a></div><div><br></div><div>This is my favorite line;</div><div><br></div><div><span class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: 'trebuchet ms'; font-size: 13px; ">Thus for this event to have occurred at all, besides the bugs in the router software of two vendors, only a few percent of the ASes on the Internet could have possibly initiated the meltdown, but only if they had a careless operator and an obscure Latvian router with outdated software. How likely was that?</span></div><div><br></div><div>Regards,</div><div>Trent</div><div><br><div><div>On 23/02/2009, at 2:19 AM, Jonny Martin wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On Feb 23, 2009, at 1:00 AM, Skeeve Stevens wrote:<br><blockquote type="cite">The flaw lay dormant until one of vendor A's systems was deployed in <br></blockquote><blockquote type="cite">an autonomous system whose ASN, modulo 256, was greater than 250. At <br></blockquote><blockquote type="cite">that point, the Internet was one typo away from disaster.<br></blockquote>...<br><blockquote type="cite">Is this just the 4byte ASN thing from months ago or something new?<br></blockquote><br>This was more a UI feature on the Mikrotiks where AS path prepending <br>was an integer field representing the number of prepends of it's own <br>ASN - rather than the more common approach of providing an actual AS- <br>path to prepend.<br><br>Cheers,<br>Jonny.<br><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></div></blockquote></div><br></div></body></html>