Configuring IGMP Join Packet Rate Limit

For setup, refer to Figure IGMP- Topology 1.

1. Execute the following commands in the router to configure a IGMP Join Packet Rate Limit for an interface.

   Type the following:

   • Enter the Global Configuration Mode.

   iS5comm# configure terminal

   • Enter the Interface Configuration mode for VLAN 2.

   iS5comm(config)# interface vlan 2

   • Specify the group join limit value.

   iS5comm(config-if)# ip igmp join ratelimit 101

   • Exit the Interface Configuration Mode.

   iS5comm(config-if)# end

2. View the configuration using the following command.

   Type the following:

   iS5comm# show ip igmp interface

   IGMP is globally enabled

   vlan2, line protocol is up

   Internet Address is 12.0.0.1/8

   IGMP is disabled on interface

   Current IGMP router version is 3

   IGMP rate limit for joins packets is 101 

   Explicit Tracking is enabled

   IGMP query interval is 200 seconds

   Last member query response interval is 20 seconds

   IGMP max query response time is 200 seconds

   Robustness value is 3

   IGMP querying router is 12.0.0.1 (this system) 

   Fast leave is enabled on this interface

   Number of multicast groups joined 1

   Checksum errors: 0, Packet length errors: 0

   Packets with Local IP as source: 0, Source subnet check failures: 0

   Query from non-querier: 0

   Report version mismatch: 0, Query version mismatch:  0

   Unknown IGMP message type: 0

   Invalid V1 reports: 0, Invalid V2 reports: 0, Invalid v3 reports: 0

   Packets dropped due to router-alert check: 0

   Reports in SSM range: 0

   Invalid Reports in SSM range: 0

   IGMP Global rate limit for joins packets : 0

3. To disable the limit for IGMP multicast group joining logical interface, execute the following commands in the router.

   Type the following:

   • Enter the Global Configuration Mode.

   iS5comm# configure terminal

   • Enable IGMP.

   iS5comm(config)# no ip igmp join