/mcpaddress is located on port 3/2, and the switch makes a static entry in the CAM table for 01- 00-5e-0a-0a-0a bounded to port 3/2. The switch also adds the router port 3/1 to the static entry for that GDA.On the switch MCAST-CGMP-JOIN: recvd CGMP JOIN msg on port 3/1 vlanNo 3 MCAST-CGMP-JOIN: join GDA 01-00-5e-0a-0a-0a MCAST-CGMP-JOIN:USA 00-60-5c-f4-bd-e2 MCAST-CGMP-JOIN: 3/2/3: index 81 MCAST-CGMP-JOIN: recvd CGMP JOIN msg on port 3/1 vlanNo 2 MCAST-CGMP-JOIN: join GDA 01-00-5e-00-01-28 MCAST-CGMP-JOIN:USA 00-60-70-cd-83-c9 MCAST-CGMP-JOIN: 3/1/2: index 80 All subsequent traffic for multicast group 239.10.10.10 are forwarded only to this port in this VLAN. Below is the static entry in the Catalyst switch where 3/1 is the router port and 3/2 is the client port. Switch_B (enable) show cam static
3 01-00-5e-0a-0a-0a 3/1-2 Total Matching CAM Entries Displayed = 3 Switch_B (enable) 6. Leaving a Group With CGMP Fast-Leave Enabled The example below requires that the client is an IGMP Version 2 client and that Fast-Leave is enabled on the switch. The following procedure enables CGMP Fast-Leave. Look at the show cgmp leave command output to determine if it is enabled. Also, look at the show cam system command output to determine if the switch is listening to 01-00-5e-00-00-01 and 01-00-5e-00-00-02 (addresses used for the leave). Switch_B (enable) show cgmp leave CGMP: enabled CGMP leave: enabled Switch_B (enable) show cam sys
1 00-10-2f-00-14-00 # 7/1 1 00-e0-fe-4b-f3-ff # 1/9 1 01-00-0c-cc-cc-cc # 1/9 1 01-00-0c-cc-cc-cd # 1/9 1 01-00-0c-dd-dd-dd # 1/9 1 01-00-0c-ee-ee-ee # 1/9 1 01-80-c2-00-00-00 # 1/9 1 01-80-c2-00-00-01 # 1/9 2 00-10-2f-00-14-00 # 7/1 2 01-00-0c-cc-cc-cc # 1/9 2 01-00-0c-cc-cc-cd # 1/9 2 01-00-0c-dd-dd-dd # 1/9 2 01-00-5e-00-00-01 # 1/9 1.