Two Internet connections to UC520. 1 for data, second for voice. Voice using SIP trunking via the Internet. Is there a way to force the SIP and RTP traffic out the second connection or to source if from the interface connected to the second connection?
A couple specific IP routes are somewhat effective to establish calls, but the media streams are all over the place as far as IP's are concerned, so static routes are out.
I've tried local policy routing, but haven't been able to figure out a combination of ACLs, etc. that match the traffic I need to force.
You can bind the SIP / RTP traffic on the UC500 to a specific WAN interface as below:
voice service voip
bind all source-interface FastEthernet 0/0 (interface must be the one with the IP address configured on it)
This may help in terms of what IP the UC500 uses to send SIP / RTP packets (helps for the return path). However the UC500 would depend on its routing table for the best route to the IP address on the far end for SIP / RTP packets. If these are not a specific subnet per what you describe you could try local policy routing as below but please ensure you test this and ensure no other flows break:
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