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[fdelawarde at wireless...]

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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[mike at jerris.com]

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: