<html><head><meta http-equiv="Content-Type" content="text/html charset=gb2312"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class=""><div class=""><blockquote type="cite" class="">I wondering the root server instance in that red region is up or<br class="">down? if it is still up, the queries can not be routed to other<br class="">server where the the probes shows green.<br class=""></blockquote><br class="">The server is up but unresponsive because of the load. As a result<br class="">most resolvers switch to another letter. (A few servers like A never<br class="">had a problem or may be were not attacked.)<br class=""><br class=""></div></div></blockquote>Fair enough. </div><div><br class=""></div><div>It seems that during the attack different letters(A~M) share the traffic load (attack traffic as well), </div><div>and different instances inside a letter(Like L-Root instances) serving the function of isolating the </div><div>attacks traffic. That¡¯s the clarification I got from the discussion so far.</div><div><br class=""></div><div>Davey </div><br class=""><div apple-content-edited="true" class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">------------------------------</div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Davey Song(ËÎÁÖ½¡)<br class="">BII Lab<br class=""><a href="mailto:songlinjian@gmail.com" class="">songlinjian@gmail.com</a><br class=""><br class=""></div></div>
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