Cisco 7604 Configuration Guide - Page 471
Monitoring H.323 RAS Sessions, H.323 GUP Support
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Chapter 22 Applying Application Layer Protocol Inspection H.323 Inspection The media negotiated between these endpoints have an LCN of 258 with the foreign RTP IP address/port pair of 172.30.254.203/49608 and an RTCP IP address/port of 172.30.254.203/49609 with a local RTP IP address/port pair of 10.130.56.3/49608 and an RTCP port of 49609. The second LCN of 259 has a foreign RTP IP address/port pair of 172.30.254.203/49606 and an RTCP IP address/port pair of 172.30.254.203/49607 with a local RTP IP address/port pair of 10.130.56.3/49606 and RTCP port of 49607. Monitoring H.323 RAS Sessions The show h323-ras command displays information for H.323 RAS sessions established across the FWSM between a gatekeeper and its H.323 endpoint. Along with the debug h323 ras event and show local-host commands, this command is used for troubleshooting H.323 RAS inspection engine issues. The show h323-ras command displays connection information for troubleshooting H.323 inspection engine issues. The following is sample output from the show h323-ras command. hostname# show h323-ras Total: 1 GK Caller 172.30.254.214 10.130.56.14 This output shows that there is one active registration between the gatekeeper 172.30.254.214 and its client 10.130.56.14. H.323 GUP Support The H.323-GUP feature is used for creation of the secondary channel for the H.323-GUP connection from the H.323-RAS connection, and for translation (NAT) of the embedded addresses in the GUP messages. It enables Gatekeepers to communicate with each other through the firewall. You do not need to enable H.323-GUP explicitly. To utilize this feature, enable H.323-RAS inspection with the appropriate access list (allowing UDP port 1719). Limitations: • H.323-GUP inspection is relevant only in topologies where the Cisco Gatekeeper devices are employed because GUP is a Cisco proprietary protocol. • Dynamic NAT and dynamic PAT are not supported in H.323 GUP inspection. OL-20748-01 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 22-55
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