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New Member

Multiple IP interfaces for voice on AS5350 ?


Our equipment: AS5350 IOS 12.2(2) XB10

We are try the following config


interface Loopback0

ip address

h323-gateway voip bind srcaddr


interface FastEthernet0/0

ip address

ip access-group VoIP-RTP in

ip route-cache flow

duplex full

speed 100

h323-gateway voip interface

h323-gateway voip h323-id 5350


But Cisco not allowed to use

h323-gateway voip bind srcaddr for fa0/0

simultaneously with lo0


h323-gateway voip interface for lo0

simultaneously with fa0/0

Plz help for our subj ?

New Member

Re: Multiple IP interfaces for voice on AS5350 ?

Help, plz!!!!!!!!!!!!

Cisco Employee

Re: Multiple IP interfaces for voice on AS5350 ?

The simple answer is that you will have to pick one interface to use to define your h323 inteface. Your router cannot present itself as two differnt devices. Let me take one the following configuration and explain it further.

h323-gateway voip bind srcaddr

What this command is instructing the router to do is to source all h323 traffic from the interface it is configured under (in this case the loopback) The reason for this is that you want to guarantee that rtp packets from a voice flow are always sent and received through the same interface. This alleviates the problem of one way audio where you have rtp traffic destined for an interface that the remote side may not be able to route to.

In either case, if the router allowed you to bind h323 traffic to multiple interfaces, you would in essence be creating the same scenario that the command was designed to fix.

The bottom line is that the gateway can only have a single h323 id as well as only a single interface to bind h323 traffic to.

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