<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Jun 20, 2013, at 10:08, abang wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Am 20.06.2013 15:29, schrieb Vernon Schryver:<br></div></blockquote>Quoting an earlier message:<br><blockquote type="cite"><div><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">"..It seems your nameservers don't agree on the SOA serial number!..."<br></blockquote></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">I wouldn't put too much stock in what <a href="http://viewdns.info/">http://viewdns.info/</a> says<br></blockquote><blockquote type="cite">about anything...<br></blockquote><br>Yes of course. But in this case it is true.<br><br>$ dig +short @ns1.linkedin.com <a href="http://linkedin.com">linkedin.com</a>. soa<br><a href="http://ns1.linkedin.com">ns1.linkedin.com</a>. <a href="http://hostmaster.linkedin.com">hostmaster.linkedin.com</a>. 2013061316 3600 600 604800 60<br>$ dig +short @ns1.p43.dynect.net. <a href="http://linkedin.com">linkedin.com</a>. soa<br><a href="http://ns1.p43.dynect.net">ns1.p43.dynect.net</a>. <a href="http://hostmaster.linkedin.com">hostmaster.linkedin.com</a>. 2013061801 3600 600 604800 60<br></div></blockquote></div><div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-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: 0px; font-size: medium; "><br></span></div><div apple-content-edited="true">Think about the role of the SOA serial number. It is used to manage the way AXFR (and Notify/IXFR) work. We also know that AXFR is not the only way to move a zone between authoritative servers, for example, rsync of files. So, the significance of the serial number is limited to situations that are relying on AXFR, and in other cases, the serial number may be interesting, but not important to proper protocol operation.</div><div apple-content-edited="true"><br></div><div apple-content-edited="true">E.g., a cache does not know the serial number corresponding to most of the answers in the cache. ("Most" - thinking about the cached SOA's and other cases like that [NCACHE].)</div><div apple-content-edited="true"><br></div><div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-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: 0px; font-size: medium; ">-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=<span></span>-=-=-=-<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-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: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>Edward Lewis <span></span> <br>NeuStar <span></span> You can leave a voice message at +1-571-434-5468<br><br>There are no answers - just tradeoffs, decisions, and responses.</div></div></div></span></span>
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