[OpenSIPS-Users] Opensips geographic redundancy

[Dave Singer]

Marcello,

Might check into getting an IP with BGP (Border Gateway Protocol) or some
other IP routing protocol. Not all ISPs offer these services and it is
usually offered on a subnet of addresses not a single address. If your
providers/contacts can't do this or don't have good answers you might check
with www.spectrumnet.us.

Dave

On Fri, Apr 29, 2011 at 9:22 AM, Marcello Lupo <mlist at itspecialist.it>wrote:

> Hi to all,
> i have a problem and hope someone can give me a clue on it.
> We have an Opensips infrastructure with heartbeat HA and it is working
> fine.
> I'm implementing the geographic redundancy on our VoIP infrastructure with
> opensips 1.6.4.
> There are 2 different locations. 2 server in each location (one running the
> Opensips and the other running the mysql DB).
> The 2 structures are totally independent but share the same DB data (with
> mysql master->slave->master replication). So each location can handle
> customer requests independently, the registrations are duplicated from one
> server to the other to maintain all the CPE's reachable from both servers.
> Now I'd like to use the DNS SRV records to let the CPEs to use the 2
> servers in a kind of load balance.
> I discovered that lot of CPE are not implementing the SRV records logic in
> a correct way.
>
> Patton CPE with 5.7 firmware make the first REGISTER (without
> authentication) on one server and after the server answer back with 401
> Unauthorized the CPE retry the REGISTER (with authentication) on the other
> server that reject it because an invalid nonce is found (it was generated
> from the other server obviously). It should continue the session with the
> same server it started with the first REGISTER because it received an answer
> and the server is alive.
>
> Asterisk 1.6 is making the REGISTER properly (one for each server) but
> place all the calls through only one server even if it is down.
>
> I'm sure will find that lot of other CPE will have trouble with SRV records
> correct implementation.
>
> I'd like to find a way to do it in a CPE software independent way.
> So i'm starting to search another solution that let me implement the
> geographic redundancy without the SRV records but I'm short of ideas now
> without inserting any Single Point of Failure in the system.
>
> I thought to a front end proxy (in HA redundancy like the one of now) to be
> a load balancer to the other 2 proxies but in any way i don't' have a
> geographic redundancy.
>
> Have you any suggestions?
> Thank you all.
> Regards,
> Marcello
>
>
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>



-- 
David Singer
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