User's Manual

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Example for changing the IGMP version
The IGMP-Router protocol of latter version is compatible with the IGMP host of low version, but cannot be
compatible with the IGMP-Router protocol of the earlier version. Therefore, if, there are switches running the
IGMP-Router protocol of the earlier version in the current network, you need to change the IGMP-Router
protocol of latter version to the IGMP-Router protocol of earliest version in the same network segment.
Suppose the administrator knows that switches running IGMP-Router V1 and IGMP-Router V2
exist in a network that the local switch connects, the administrator needs to change the version
of the IGMP-Router protocol from version 2 to version 1 on a port of the switch that runs IGMP-
Router V2.
interface ethernet 1/0
ip igmp version 1