Restrictions The NAT Segmentation with Layer 4 Forwarding feature does not work when: Cisco IOS firewalls are configured using the ip inspect name command. (Zone-based firewalls are supported.) H.323, SCCP, or TCP DNS messages are larger than 18 KB. Multiprotocol Label Switching (MPLS) is configured. NAT and the Cisco CallManager are configured on the same device. In this case, the colocated solution in Call Manager Express (CME) is used. NAT Virtual Interface (NVI) is configured. Stateful Network Address Translation (SNAT) is enabled. The match-in-vrf keyword is configured along with the ip nat inside source command for packet translation. The packets are IPv6 packets. Все, что я могу посоветовать, это глубже покопаться в доках и все-таки настроить SIP ALG. |