IOS new versions and network load

Jean-Francois Mezei jfmezei_nanog at
Sun Sep 17 23:43:50 UTC 2017

On 2017-09-17 19:37, Eduardo Schoedler wrote:

> Server is an app now, any MacOS can have it running.

But do carriers/ISPs really want to deal with a rack unfriendly Mac Mini
or iMac at a carrier hotel?  If the Server App could run on Linux, or if
OS-X could boot on standard servers, perhaps, it it seems to be a very
bad fit in carrier/enterprise environments.

> Implementation will be a little tricky, because you need your
> customers to look a record in your domain.

I've tried reading some about it.
The cache server app registers with Apple its existence and the IP
address ranges it serves

When a client wants to download new IOS version, Apple checked and finds
that the client's IP is served by the caching server whose "local" IP is
a.b.c.d (akaL the inside NAT IP address). Tells client to get version of
software from that IP address.

The DNS TXT records are used by the Caching Server to get the list of IP
blocks it can serve.  (not needed in the target small office
environments where everyone is on same subnet and the caching server can
tell the apple serves the one subnet it seves).

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