You can try this,
you can use this ACL to pick up voice and H323 signalling packets.
access-list 102 permit udp any any range 16384 37276
access-list 103 permit tcp any eq 1720 any
access-list 103 permit tcp any any eq 1720
Where,
access-list 102 matches VoIP traffic based on the UDP port range.
access-list 103 matches VoIP signaling protocol. In this case, H.323 V2 is uesd with the
fast start feature.
Then we just need to apply this to a route-map and the interface:
a) Define a route-map for traffic to go to next-hop 6.6.6.6
route-map equal-access permit 10
match ip address 102
set ip default next-hop 6.6.6.6
route-map equal-access permit 20
match ip address 103
set ip default next-hop 6.6.6.6
b) apply it to the inside (where the voice is connected to) interface:
int Ethernet0/0
ip policy route-map equal-access
