nanog mailing list archives
RE: dns based loadbalancing/failover
From: "Vivien M." <vivienm () dyndns org>
Date: Sun, 7 Oct 2001 01:14:24 -0400
-----Original Message----- From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of Valdis.Kletnieks () vt edu Sent: October 7, 2001 1:05 AM To: Mary Grace Cc: nanog () merit edu 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): vivienm@quartz:~$ 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 vivienm@quartz:~$ 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 vivienm@nickel:~$ 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 vivienm@lapis:~$ 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] vivienm@deep:~$ 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] vivienm@quartz:~$ 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. vivienm () dyndns org Assistant System Administrator Dynamic DNS Network Services http://www.dyndns.org/
Current thread:
- Re: sub-basement multihoming (Re: Verio Peering Question), (continued)
- Re: sub-basement multihoming (Re: Verio Peering Question) Peter van Dijk (Oct 05)
- dns based loadbalancing/failover bert hubert (Oct 06)
- Re: dns based loadbalancing/failover E.B. Dreger (Oct 06)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 06)
- Re: dns based loadbalancing/failover Mary Grace (Oct 06)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 06)
- Re: dns based loadbalancing/failover Mary Grace (Oct 06)
- Re: dns based loadbalancing/failover Fletcher E Kittredge (Oct 07)
- Re: dns based loadbalancing/failover Robert E. Seastrom (Oct 06)
- Re: dns based loadbalancing/failover Valdis . Kletnieks (Oct 06)
- RE: dns based loadbalancing/failover Vivien M. (Oct 06)
- Re: dns based loadbalancing/failover Christopher A. Woodfield (Oct 07)
- Re: dns based loadbalancing/failover Patrick Greenwell (Oct 06)
- Re: dns based loadbalancing/failover Paul A Vixie (Oct 06)
- Re: dns based loadbalancing/failover bert hubert (Oct 06)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 06)
- Re: dns based loadbalancing/failover bert hubert (Oct 07)
- Re: dns based loadbalancing/failover Paul Vixie (Oct 07)
- Re: dns based loadbalancing/failover Randy Bush (Oct 07)
- Re: dns based loadbalancing/failover Patrick Greenwell (Oct 07)
- Re: dns based loadbalancing/failover Peter van Dijk (Oct 06)