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Chapter 10
Configuring Multicast
switch1> (enable)
switch1> (enable) show cgmp statistics
CGMP enabled
CGMP statistics for vlan 1:
valid rx pkts received 6
invalid rx pkts received 0
valid cgmp joins received 6
valid cgmp leaves received 0
valid igmp leaves received 0
valid igmp queries received 0
igmp gs queries transmitted 0
igmp leaves transmitted 0
failures to add GDA to EARL 0
topology notifications received 0
number of packets dropped 0
switch1> (enable)
Once CGMP is enabled, you can look at statistics using the show cgmp
statistics
command. This is all that is needed to enable CGMP on the
switch so that it can communicate with the router.
Summary
T
his chapter has been dedicated to the syntax and method of IP multi-
cast configuration in Cisco routers and switches. Several points were dis-
cussed about the importance of planning the IP multicast deployment.
In addition to learning the commands for rendezvous points and hosts,
you learned a few troubleshooting commands that will aid you in verifying
that the multicast network has full functionality.
Key Terms
Before you take the exam, be sure you're familiar with the following terms:
Auto-RP
mtrace
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