[38025] in North American Network Operators' Group
cnn.com name servers all in one AS
daemon@ATHENA.MIT.EDU (Daniel Senie)
Sun May 27 11:32:04 2001
Message-Id: <5.1.0.14.2.20010527110715.00a6c3a0@mail.amaranth.net>
Date: Sun, 27 May 2001 11:17:15 -0400
To: nanog@merit.edu
From: Daniel Senie <dts@senie.com>
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Errors-To: owner-nanog-outgoing@merit.edu
Lookup on cnn.com reveals a response of 4 name servers:
NS-01A.ANS.NET 199.221.47.7
NS-01B.ANS.NET 199.221.47.8
NS-02A.ANS.NET 207.24.245.179
NS-02B.ANS.NET 207.24.245.178
All 4 of these are in AS 1673.
This situation has existed for a long time. CNN has their actual servers
multihomed, and (I think) uses Akamai for content delivery. However, the
core name servers remain on a single AS, so any routing problem within that
AS, or peering issues affecting that AS will result in CNN.COM disappearing.
Microsoft appears to have spread their DNS servers across multiple ASs
after their disappearing act a while back. Though I've seen issues with
CNN.COM reachability affected by ANS.NET issues as far back as 3 years ago,
their DNS strategy remains unchanged.
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Daniel Senie dts@senie.com
Amaranth Networks Inc. http://www.amaranth.com
