[186159] in North American Network Operators' Group
Re: Netflow parameters and data that comes from CDNs
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Tue Dec 1 21:54:05 2015
X-Original-To: Nanog@nanog.org
From: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <565E32F3.3010303@vaxination.ca>
Date: Tue, 1 Dec 2015 21:53:52 -0500
To: NANOG list <Nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
The answer is: It depends.
:)
In the case of Akamai, for a standard streaming or HTTP service, the IP =
address is not dedicated to a single customer. Also, Akamai is not going =
to give you a list of IP addresses serving your content.
This is specific to Akamai, and for a general Akamai customer. Obviously =
anything _can_ be done with enough money and negotiation. (Also, neither =
of the two tidbits of info above is confidential or even difficult to =
find on the Internet.)
I am unsure how other CDNs handle these requests. I -suspect- it would =
be easier for other CDNs to guarantee certain content is always served =
from certain IP addresses.
As for who owns the IP address of the Akamai server, Akamai is very =
public about putting servers inside networks. It is called their AANP =
program. AANP servers are frequently numbered with the hosting ISP=E2=80=99=
s space. But an AANP node is not guaranteed to have the ISP=E2=80=99s IP =
space, and not all servers are in AANP nodes.
--=20
TTFN,
patrick
> On Dec 1, 2015, at 6:53 PM, Jean-Francois Mezei =
<jfmezei_nanog@vaxination.ca> wrote:
>=20
>=20
> Hopefully this should be a simple question ...
>=20
> (Note: Akamai used as a generic CDN name in the context of this email
> and could be any CDN provider)
>=20
>=20
> Context: regulatory filings where wireless carriers states that zero
> rating of certain selected streaming music is done based on the "from
> IP" in packets coming into its network.
>=20
>=20
> When a content provider such as jf_music.com (fictitious) makes use =
of
> one or more content distribution networks, does the "from IP" in =
packets
> belong to the CDN, or to jf_music.com ? (if Akamai uses IPs provided =
by
> jf_music, this has inteteresting routing questions).
>=20
>=20
> If I setup such a service with Akamai, does Akamai provide me with an
> authoritative list of IPs that will be generating my traffic in =
various
> cities ? Are these IPs stable or would they typically change fairly
> often as Akamai builds more nodes etc ?
>=20
> And do various CDNs have very different implementations ?
>=20
>=20
> And in fictitious case of jf_music.com hiring Akamai, would the Akamai
> server(s) have a dedicated IP for jf_music in each city (or re-use =
same
> IP via anycast) or would the CDN servers use the same IP address to
> deliver multiple services from totally different content providers ?
>=20
> (Considering BGP routing limits , I have to assume that routing of
> individual IPs can't be done).
>=20
> I need more of a sanity check on this.
