[166875] in North American Network Operators' Group
Re: List of CDNs?
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Sat Nov 16 17:25:39 2013
From: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <20131114222549.GB67966@ak-labs.net>
Date: Sat, 16 Nov 2013 17:25:18 -0500
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
--Apple-Mail=_4B046E7D-C9EF-46F1-ABA3-31005618820F
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii
On Nov 14, 2013, at 17:25 , Carlos Kamtha <kamtha@ak-labs.net> wrote:
> The goal is to find a solution to optimize the path for DNS queries =
that traverse via CDNs within certain regions=20
> without the luxury of a network layer.=20
>=20
> For instance, some clients in singapore are getting answers from the =
UK instead of something more local.=20
>=20
> Knowing where the CDNs are may allow us to direct them to a more =
optimal path.=20
Depends on the CDN. Using Akamai as an example (since they are =
essentially as big as all other CDNs combined, and 'cause I know them =
best), the location of an Akamai web server is not useful since =
everything is based on name servers. Also, the location of Akamai's name =
server and the topological path used to reach it is irrelevant to the =
web server returned. So getting a list of nodes and somehow modifying =
your network based on that will likely have minimal to zero impact.
Other CDNs use different methods of mapping end users to web servers. =
Some use anycast, either at the DNS level or even at the HTTP level. In =
those cases, this information may be of use.
If you have a problem with Akamai mapping, you can always email =
NetSupport-tix@akamai.com and ask them for help. My guess is other CDNs =
have something similar. Probably much more useful to go directly to the =
CDN with the problem than look at a 3rd party list of nodes and try to =
fix issues yourself with methods that may have no effect.
Or not. :) Your network, your decision, I'm just making suggestions.
--=20
TTFN,
patrick
> On Thu, Nov 14, 2013 at 10:11:59PM +0000, Patrick W. Gilmore wrote:
>> List of CDNs would be difficult, but not impossible. Although they do =
different things, so a simple list is unlikely to be as useful as it =
looks.=20
>>=20
>> A lost of CDN "DC nodes" is not possible. Why do you care about such =
a thing anyway?
>>=20
>> --=20
>> TTFN,
>> patrick
>>=20
>> Composed on a virtual keyboard, please forgive typos.=20
>>=20
>>=20
>>> On Nov 14, 2013, at 22:02, Carlos Kamtha <kamtha@ak-labs.net> wrote:
>>>=20
>>> Hi,
>>>=20
>>> I was wondering if anyone knows where I could find a compiled list =
of Content Delivery Networks as well
>>> as thier DC nodes? if any..
>>>=20
>>> Please respond offlist.
>>>=20
>>> Cheers,
>>> Carlos
>>>=20
>=20
--Apple-Mail=_4B046E7D-C9EF-46F1-ABA3-31005618820F
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
filename=signature.asc
Content-Type: application/pgp-signature;
name=signature.asc
Content-Description: Message signed with OpenPGP using GPGMail
-----BEGIN PGP SIGNATURE-----
Comment: GPGTools - http://gpgtools.org
iQEcBAEBAgAGBQJSh/DOAAoJEHZX8udmu5TX1roIAO9YCwU+2JAzFlWvhSAQr+Fz
b34lLg/MH07K+uN4Mb8+oziuvtYPDQNWL1TFudYM7tNlckC9sE/9EytM76nRsXhr
cgYW51UfQV17amRGrMDGntT1hKsinUSJAtzt0Pgo+ax1XjLjzXaPe6luMsTifF9B
JBVL1O0oyJ9shGL2mpNSizxsp3BE3S8iEx9lflTGjsCsOjgbb/L2l5EXXZgBgFIM
bVB6B1/Yp2GQw+RLhGu28QKy0z8F6NGlb6GQVSh6CjrhCLUmRjv1Mhyvf9NSvd0h
MMm3nuoEWwIGv2uH0M5oTsuXw/diGMwrTSxlRQwBnnyddIHWXxVxoVBNi9lktgY=
=iAUN
-----END PGP SIGNATURE-----
--Apple-Mail=_4B046E7D-C9EF-46F1-ABA3-31005618820F--
