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as the querier for that shared network, the other switches act as timers monitoring the
status of the querier; if no query packet from the querier is received after the query
timeout time, a new switch will be elected to be the new querier.
Example: Configuring the interface timeout setting for IGMP queries to 100 seconds.
Switch (Config)#interface vlan 1
Switch(Config-If-Vlan1)#ip igmp query-timeout 100
19.6.2.2.6
ip igmp static-group
Command: ip igmp static-group <A.B.C.D >
no ip igmp static -group <A.B.C.D >
Function: Joins the interface to an IGMP static group; the "no ip igmp static -group" command
cancels the join.
Parameters: <A.B.C.D> are the IP addresses for multicast groups.
Default: Not joined to static groups.
Command mode: Interface Mode
Usage Guide: After an interface joins a static group, then the interface will receive multicast packet
about that static group regardless of whether there are actual receivers under the
interface or not; for instance, if the local interface joins static group 224.1.1.1., then
the local interface will keep receiving multicast packets about he group 224.1.1.1
regardless of whether there are receiver of not under the interface. Note the
difference between this command and the "ip igmp join-group" command.
Example: Specifing interface vlan1 to join static group 224.1.1.1.
Switch (Config)#interface vlan 1
Switch(Config-If-Vlan1)#ip igmp static-group 224.1.1.1
19.6.2.2.7
ip igmp version
Command: ip igmp version <version>
no ip igmp version
Function: Configures the IGMP version of the interface; the "no ip igmp version" command
restores the default setting.
Parameters: <version> is the IGMP version configured, v1 and v2 are supported at present.
Default: The default version number is v2.
Command mode: Interface Mode
Usage Guide: This command is used to provide forward compatibility between different versions. It
should be noted that v1 and v2 are not inter-connectable, and the same version of
IGMP must be ensured for the same network.
Example: Configuring the IGMP running on the interface to version 1.
Switch (Config)#interface vlan 1
Switch(Config-If-Vlan1)#ip igmp version 1
19.6.3 Typical IGMP Scenario
As shown in the figure below, the Ethernet interfaces of SwitchA and SwitchB are added to the
EES4710BD 10 Slots L2/L3/L4 Chassis Switch
497
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Troubleshooting
