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Multimedia Traffic Control with IP Multicast (IGMP)
More on IGMP Operation
The 33 specifies port B7.
The 2 shows that Fast
Forced-Leave is disabled
on port B7.
Figure 12-8. Listing the Forced Fast-Leave State for a Single Port
Configuring Per-Port Forced Fast-Leave IGMP. In the factory-default
configuration, Forced Fast-Leave is disabled for all ports on the switch. To
enable (or disable) this feature on individual ports, use the switch’s MIB
commands, as shown below.
Syntax: setmib hpSwitchIgmpPortForcedLeaveState.1.<port-number> -i < 1 | 2 >
or
setmib 1.3.6.1.4.1.11.2.14.11.5.1.7.1.15.3.1.5.1.<port-number> -i < 1 | 2 >
where:
1 = Forced Fast-Leave enabled
2 = Forced Fast-Leave disabled
For example, to enable Forced Fast-Leave on ports B7 and B8:
Command
Verification
Figure 12-9. Example of Changing the Forced Fast-Leave Configuration on Ports 7 and 8
Querier Operation
The function of the IGMP Querier is to poll other IGMP-enabled devices in an
IGMP-enabled VLAN to elicit group membership information. The switch
performs this function if there is no other device in the VLAN, such as a
multicast router, to act as Querier. Although the switch automatically ceases
Querier operation in an IGMP-enabled VLAN if it detects another Querier on
the VLAN, you can also use a CLI command to disable the Querier function
for that VLAN. For example, to disable the Querier function on VLAN 1 in the
switch:
1. Disable Querier function on VLAN 1.
HPswitch(config)# no vlan 1 ip igmp querier
2. Disable Querier function on VLAN 1 from within the VLAN 1 context.
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