Operation Manual - Multicast Protocol
Quidway S6500 Series Ethernet Switches Chapter 5 IGMP Configuration
Huawei Technologies Proprietary
5-2
that a host has left the group. In IGMP Version 2, when a host replying to the last
membership query message leaves a multicast group, it should send a leave group
message to the multicast router.
III. Group-specific query
In IGMP Version 1, the query message of multicast router aims at all the multicast
groups in the network segment. This query is called general query.
IGMP Version 2 adds group-specific query, where the IP address of a multicast group is
taken as the destination IP address and the group address domain of the query
message, to prevent the member hosts of other groups from replying to this message.
IV. Maximum response time
The Max Response Time is added in IGMP Version 2. It is used to dynamically adjust
the allowed maximum time for a host to reply to the membership query message.
5.2 IGMP Configuration
After multicast is enabled, IGMP must be enabled on the interface before other IGMP
configurations.
Basic configuration tasks of IGMP include:
z Enabling multicast
z Enabling IGMP on an interface
Advanced configuration tasks of IGMP include:
z Configuring a router as a group member
z Controlling the access to IP multicast group
z Configuring the interval for querying IGMP packets
z Configuring IGMP version
z Configuring the existing duration of IGMP querier
z Configuring the maximum query response time for IGMP
z Limiting the number of IGMP groups on an interface
z Configuring Last member query interval
z Configuring Last member query count
z Deleting the IGMP group from the interface
5.2.1 Enabling Multicast
Multicast-related configuration will not take effect if multicast is not enabled.
See Common Multicast Configuration.
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