[Freeswitch-users] sofia gateways and linux multipath routing

[Michael Jerris]

You need a sofia profile for each identity, if your using multiple  
external ip addresses, you will need a profile for each.  If you are  
using bgp or something of the sort and only using one external ip, you  
can use a single profile and route using standard routing.

Mike

On Oct 13, 2009, at 6:09 AM, François Delawarde wrote:

> Hello all,
>
> I'm interested in using mod_sofia with multiple Internet connections
> (configured as a unique load-balancing route using multipath).
>
> One solution would be to define a different profile for each  
> connection,
> but it would be more practical having a unique external profile that
> would automatically handle everything (detecting multiple public IPs  
> and
> selecting the right one for a call, being able to select the router  
> for
> gateway registration...).
>
> Routing table:
> 192.168.10.0/24 dev eth0  proto kernel  scope link  src 192.168.10.1
> 192.168.1.0/24 dev eth1  proto kernel  scope link  src 192.168.1.2
> 192.168.2.0/24 dev eth2  proto kernel  scope link  src 192.168.2.2
> default  proto static
> 	nexthop via 192.168.1.1  dev eth1 weight 1
> 	nexthop via 192.168.2.1  dev eth2 weight 1
>
> Both default routers (192.168.1.1 and 192.168.2.1) would have a  
> distinct
> public IP.
>
> Several questions cross my mind:
> - Can a unique sofia profile be bound to multiple IPs (not 0.0.0.0)?
>
> - How would FS behave with a unique external profile in that  
> situation?
>   * Would FS reply to an incoming call using the same router it came
> from forcing packet source address?
>   * Would FS stick to a unique router for all flows of an outgoing  
> call
> (SIP, RTP, UDPTL)?
>   * Can I force a gateway to use a given router (for calls,
> registration, ...)?
>   * Would the NAT system (using stun or auto-nat) work in that
> situation, or does it assume only one default router (and a unique
> public IP) exists per profile?
>
> - Knowing the above, would it be necessary to use a different profile
> for each router/interface, and define the same gateway in each of  
> these?
>
> - Tricky question: What if multiple routers are on the same
> network/interface (192.168.1.1, 192.168.1.2, ...)?
>
>
> Thanks in advance,
> François.
>
>
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