Modifying IGMPv1 and IGMPv2 Parameters
Various IGMP parameters can be modified from their default values.
IGMP allows RUCKUS devices to limit the multicast of IGMP packets to only those ports on the device that are identified as IP Multicast members. The device actively sends out host queries to identify IP Multicast groups on the network, inserts the group information in an IGMP packet, and forwards the packet to IP Multicast neighbors.
The following IGMP version 1 (v1) and version 2 (v2) parameters apply to PIM:
- IGMP query interval: Specifies how often the RUCKUS device queries an interface for group membership. Possible values are from 2 through 3600. The default is 125.
- IGMP group membership time: Specifies how many seconds an IP Multicast group can remain on a RUCKUS device interface in the absence of a group report. Possible values are from 5 through 26000. The default is 260.
- IGMP maximum response time: Specifies how many seconds the RUCKUS device will wait for an IGMP response from an interface before concluding that the group member on that interface is down and removing the interface from the group. Valid values range from 1 through 50 seconds. The default is 10 seconds.
- Enter global configuration mode.
- To modify the default value for the IGMP query interval, use the
ip igmp query-intervalcommand. - To modify the IGMP group membership time, use the
ip igmp group-membership-timecommand. - To change the IGMP maximum
response time, use the
ip igmp max-response-timecommand.
The following example modifies the IGMP query interval to 120 seconds, the IGMP group membership time to 240 seconds, and the IGMP maximum response time to 8 seconds.
device# configure terminal device(config)# ip igmp query-interval 120 device(config)# ip igmp group-membership-time 240 device(config)# ip igmp max-response-time 8