asterisk users - May 2007 - Asterisk with Multiple Network Interfaces

I have a scenario here with IP phones, on a private 192.168 network
connecting to an Asterisk box, also on the same 192.168 private network.
We'd like to have the Asterisk box also be able to send traffic to the
public IP space. For this, we would need to multi-home the box, and put
two network cards in it, with two IP addresses, one on each network.

 

I know from past experience that Asterisk only listens on the first
interface, or a single one if specified. I imagine this will cause all
sorts of problems with a multi homed approach. Has anyone gotten around
this?

 

Thanks,

Doug.

 

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I don't think that it is true that it will only listen on the first 
interface.

I've built many boxes with the configuration you describe. In many 
networks the phones are on their own vlan with the PBX and the PBX is 
also connected to the gateway router acting as the gateway for the phone 
vlan.

-Jonathan

Douglas Garstang wrote:
>
> I have a scenario here with IP phones, on a private 192.168 network 
> connecting to an Asterisk box, also on the same 192.168 private 
> network. We?d like to have the Asterisk box also be able to send 
> traffic to the public IP space. For this, we would need to multi-home 
> the box, and put two network cards in it, with two IP addresses, one 
> on each network.
>
> I know from past experience that Asterisk only listens on the first 
> interface, or a single one if specified. I imagine this will cause all 
> sorts of problems with a multi homed approach. Has anyone gotten 
> around this?
>
> Thanks,
>
> Doug.
>
> ------------------------------------------------------------------------
>
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On 5/25/07, Douglas Garstang <DGarstang@interainc.com>
wrote:
>
>  I have a scenario here with IP phones, on a private 192.168 network
> connecting to an Asterisk box, also on the same 192.168 private network.
> We'd like to have the Asterisk box also be able to send traffic to the
> public IP space. For this, we would need to multi-home the box, and put two
> network cards in it, with two IP addresses, one on each network.
>
Or route the subnet and put it behind NAT. But yes, your solution is
certainly viable.

I know from past experience that Asterisk only listens on the
first
> interface, or a single one if specified. I imagine this will cause all
sorts
> of problems with a multi homed approach. Has anyone gotten around this?
>
I haven't had a problem. Each of our Asterisk servers are multi-homed, and
each talks SIP and IAX on all of the various networks without problems. Make
sure you set Canreinvite=no to people on the outside network or you'll have
audio problems. Other than that, it should be really straightforward.
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I have a box doing this, Asterisk listens on either IP unless you bind to a
specific interface.

On 5/25/07, Douglas Garstang <DGarstang@interainc.com>
wrote:
>
>  I have a scenario here with IP phones, on a private 192.168 network
> connecting to an Asterisk box, also on the same 192.168 private network.
> We'd like to have the Asterisk box also be able to send traffic to the
> public IP space. For this, we would need to multi-home the box, and put two
> network cards in it, with two IP addresses, one on each network.
>
>
>
> I know from past experience that Asterisk only listens on the first
> interface, or a single one if specified. I imagine this will cause all
sorts
> of problems with a multi homed approach. Has anyone gotten around this?
>
>
>
> Thanks,
>
> Doug.
>
>
>
> _______________________________________________
> --Bandwidth and Colocation provided by Easynews.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
>

-- 
Bruce Reeves
Nortex Networks
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