North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: dns based loadbalancing/failover
> -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of [email protected] > Sent: October 7, 2001 1:05 AM > To: Mary Grace > Cc: [email protected] > Subject: Re: dns based loadbalancing/failover > > > > On Sat, 06 Oct 2001 16:44:57 EDT, Mary Grace said: > > Hrmm, no, that is called "Akamai", isn't it? :) > > There's an Akamai across the hall from my office, and the way > it was explained to *me* was that the DNS always returns the > same IP address for a given Akamai'zed page (so the URLs in > the HTML are consistent), but routing games are used to > direct the packets to the appropriate server. In other > words, it's one IP that points to disparate machines. They lied to you (I don't remember who a96.g.akamai is; it's some well-known Akamai customer, maybe CNN): [email protected]:~$ nslookup a96.g.akamai.net Server: quartz.bos.dyndns.org Address: 66.37.218.198 Non-authoritative answer: Name: a96.g.akamai.net Addresses: 216.32.119.10, 216.32.119.74 [email protected]:~$ nslookup a96.g.akamai.net amethyst.ith.dyndns.org Server: amethyst.ith.dyndns.org Address: 216.7.11.130 Non-authoritative answer: Name: a96.g.akamai.net Addresses: 207.127.111.70, 207.127.111.73 [email protected]:~$ nslookup a96.g.akamai.net Server: zinc.fmt.dyndns.org Address: 64.71.191.27 Non-authoritative answer: Name: a96.g.akamai.net Addresses: 64.21.49.15, 64.21.49.36 [email protected]:~$ nslookup a96.g.akamai.net Server: 212.100.224.10 Address: 212.100.224.10#53 Name: a96.g.akamai.net Address: 64.124.157.126 Name: a96.g.akamai.net Address: 64.124.157.91 [from my home box] [email protected]:~$ nslookup a96.g.akamai.net Server: proxy1.slnt1.on.wave.home.com Address: 24.112.33.4 Name: a96.g.akamai.net Addresses: 65.163.234.8, 65.163.234.24 [from one of your DNS servers] [email protected]:~$ nslookup a96.g.akamai.net milo.cns.vt.edu Server: milo.cns.vt.edu Address: 198.82.247.98 Name: a96.g.akamai.net Addresses: 198.82.164.48, 198.82.164.40 I'm sure I could keep going if you really wanted, but I think that's enough to prove the point... Vivien -- Vivien M. [email protected] Assistant System Administrator Dynamic DNS Network Services http://www.dyndns.org/
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