Dell FCX624-S Laptop User Manual


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PowerConnect B-Series FCX Configuration Guide 659
53-1002266-01
Configuring IGMP snooping
22
Syntax: [no] ip pimsm-snooping
NOTE
The device must be in passive mode before it can be configured for PIM snooping.
Configuring the IGMP mode for a VLAN
You can configure a VLAN to use the active or passive IGMP mode. The default mode is passive.
The setting specified for the VLAN overrides the global setting:
Active - An active IGMP mode device actively sends out IGMP queries to identify multicast
groups on the network, and makes entries in the IGMP table based on the group membership
reports received.
Passive - A passive IGMP mode device forwards reports to the router ports which receive
queries. IGMP snooping in the passive mode forwards queries to the entire VLAN, but it does
not send queries.
To set the IGMP mode for VLAN 20 to active, enter the following commands.
PowerConnect(config)# vlan 20
PowerConnect(config-vlan-20)# multicast active
Syntax: [no] multicast active | passive
Disabling IGMP snooping for the VLAN
When IGMP snooping is enabled globally, you can still disable it for a specific VLAN. For example,
the following commands cause IGMP snooping to be disabled for VLAN 20. This setting overrides
the global setting.
PowerConnect(config)# vlan 20
PowerConnect(config-vlan-20)# multicast disable-multicast-snoop
Syntax: [no] multicast disable-multicast-snoop
Enabling PIM sparse mode snooping for the VLAN
You can enable PIM snooping for a specific VLAN. For example, the following commands enable
PIM snooping on VLAN 20.
PowerConnect(config)# vlan 20
PowerConnect(config-vlan-20)# multicast pimsm-snooping
Syntax: [no] multicast pimsm-snooping
Disabling PIM sparse mode snooping for the VLAN
When PIM snooping is enabled globally, you can still disable it for a specific VLAN. For example, the
following commands disable PIM snooping for VLAN 20. This setting overrides the global setting.
PowerConnect(config)# vlan 20
PowerConnect(config-vlan-20)# multicast disable-pimsm-snoop
Syntax: [no] multicast disable-pimsm-snoop