Search Again: Re: two subnet''s? From: Eric Bickford Date: Friday, April 9, 1999 Time: 2:47:00 am >>2. For some reason our secondary DNS server get's a lot of traffic. We >>don't want the backup subnet getting this traffic all the time. > >Your servers are <ns.retort.com> and <ns1.retort.com>. The root servers >appear to report them in alphabetical order, sorting numbers before >letters. I'm not sure if that's a feature of the root servers, or if >they've just been entered in that order. Since they're on the same subnet, >they're the same distance away from any name resolver, so the name resolver >chooses the first one it finds. That's why the secondary gets more traffic. For the record, another DNS guy I talked to doesn't think this is the case. He thinks it's just the UDP protocol. That is, if a UDP request fails on the first try it just drops it and gives up and goes on to send a request to the secondary name server. This got me thinking. I can simply setup a single machine to handle both primary and secondary name servers via multihoming on one subnet, then specify the second machine acting as a third name server but configured as a primary server on the second subnet. Yes, confusing. The problem then is keeping the third name server synchronized but with a different class C. Client's would try to query the main name server _twice_ rather than once, then it would fall back on the third name server. The router on the second subnet would need to do NAT. Just thinking aloud... Anyone know the difference in the QuickDNS preferences between "minimum" and "time-to-live"? I'm told "minimum" is actually the TTL? Thanks. ______________________________________________________________________ Eric Bickford eric@macweb.com Web Broadcasting http://webfm.com/

Messages In This Thread: two subnet''s? by Eric Bickford on Apr 8, 1999 at 2:16:00 am Re: two subnet''s? by Chris Buxton on Apr 8, 1999 at 6:28:00 am Re: two subnet''s? by Eric Bickford on Apr 8, 1999 at 5:29:00 pm Re: two subnet''s? by Chris Buxton on Apr 8, 1999 at 7:19:00 pm Re: two subnet''s? by Eric Bickford on Apr 9, 1999 at 2:47:00 am Re: two subnet''s? by Chris Buxton on Apr 9, 1999 at 6:49:00 pm