Apple updates - Akamai effect

J nanog at
Sun Oct 16 22:19:41 UTC 2011

Baskett, Andrew wrote:
> Hi J,
> As Patrick mentioned, on-net private Akamai clusters should not be serving
> out of your network unless you desire them to or there is a configuration
> mistake.
> There is a small caveat; we direct users by which DNS they use and not by
> end user IP address.  So if a user has switched ISPs and not updated their
> DNS, they could still be directed to the previous ISP's on-net cluster.
> Of course, this would be viewed as serving offnet but usually makes up a
> very small % of traffic (think <1%)
> Unfortunately, Akamai has no control over this aspect but ISPs have a few
> options to mitigate it.
> If you can let me know more info about what you are seeing, we would be
> happy to investigate & help further.
> Thanks,
> Andrew Baskett
> Senior Network Support - Akamai Technologies - Cambridge, MA USA
> 888-421-1003 or +1-617-444-0089 - netsupport-tix at


Actually, I've already been talking to you somewhat about our upgrades in
the area, I believe.

I'm mostly curious about what the user impact is on the cluster and link
upgrades in terms of experience when that happens.  This seems to be a
common progression, so I'm curious ahead of time.

> ---------- Forwarded message ----------
> From: "Patrick W. Gilmore" <patrick at>
> To: North American Operators' Group <nanog at>
> Date: Sat, 15 Oct 2011 20:43:20 -0400
> Subject: Re: Apple updates - Akamai effect
> On Oct 15, 2011, at 20:06, J <nanog at> wrote:
>> Simon Leinen wrote:
>>> Guess it was a good idea to upgrade that Akamai cluster's uplink to
>>> 10GE, even though 2*GE (or was it 4*GE) looked sufficient at the time.
>>> Remember folks, "overprovisioning" is a misnomer, it should be called
>>> "provisioning for robustness and growth".
>> If I may change the thrust a bit, this is of interest to me.
>> Just because we're in the midst of similar - changing from 2xGE to 10GE
>> and
>> increasing the number of Akamai nodes.
>> Anyone have similar stats on that sort of conversion, and what to expect?
>> From what I can tell, there's a fair bit of local, off-net traffic
>> coming to
>> ours, so I'm curious what the turn-up may look like.
> It sounds like you have what Akamai calls an "AANP" deployment.  In
> general, that should not serve users outside your network.  There are
> reasons it can, and you should talk to Akamai about it if you think it is.
> If you have questions about an on-net node, feel free to email Akamai's
> Network Support group, NetSupport at  They are only M-F, but they
> can answer any questions you have.
> --
> patrick

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