Symptom
T38 fax failing on ISRg2 platform which is configured as CUBE with multi VRF.
CUBE receive T38 packets from one Leg but never forward these packets to other call leg.
"show call active voice brief " and "debug voip rtp packets" show packets are send out .But when we collect packet captures from CUBE interface ,we could not see t38 packets.
Conditions
CUBE is configured to use different VRF on incoming and outgoing Call leg
Workaround
Remove VRF configuration from interface and reload router
