To clarify, I am trying to do a packet-capture on the IP address that is on the loop-back interface.
I can do a packet-capture on the VPN endpoint to capture the VPN encapsulated packets, checking the QoS tagging on the VPN Packets.
But I cannot seem to get a packet capture of the SIP/RTP running in side the VPN that is decoded and sent to the switchboard.
I want to capture the data after the VPN data is un-encapsulated and before it goes to the switchboard.
Adtran support confirmed there are no facilities within the Adtran that would allow SIP/RTP packet-captures between the VPN logic and the Switchboard logic in the Adtran.