Dell PowerConnect B-RX Configuration Manual page 724

23
Configuring IP multicast traffic reduction
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To enable active IGMP, enter the following command.
BigIron RX(config)# ip multicast active
BigIron RX(config)# write memory
BigIron RX(config)# end
BigIron RX# reload
Syntax: [no] ip multicast active | passive
To enable passive IGMP, enter the following command.
BigIron RX(config)# ip multicast passive
BigIron RX(config)# write memory
BigIron RX(config)# end
BigIron RX# reload
Modifying the query interval
If IP Multicast Traffic Reduction is set to active mode, you can modify the query interval, which
specifies how often a BigIron RX enabled for active IP Multicast Traffic Reduction sends Group
Membership queries.
NOTE
The query interval applies only to the active mode of IP Multicast Traffic reduction.
To modify the query interval, enter a command such as the following.
BigIron RX(config)# ip multicast query-interval 120
Syntax: [no] ip multicast query-interval <interval>
The <interval> parameter specifies the interval between queries. You can specify a value from 10 –
600 seconds. The default is 60 seconds.
Modifying the age interval
When the device receives a Group Membership report, the device makes an entry in the IGMP
group table for the group in the report. The age interval specifies how long the entry can remain in
the table without the device receiving another Group Membership report.
To modify the age interval, enter a command such as the following.
BigIron RX(config)# ip multicast age-interval 280
Syntax: [no] ip multicast age-interval <interval>
The <interval> parameter specifies the interval between queries. You can specify a value from 10 –
1220 seconds. The default is 260 seconds.
Filtering multicast groups
By default, the BigIron RX forwards multicast traffic for all valid multicast groups. You can configure
a BigIron RX to filter out all multicast traffic for groups other than the ones for which the device has
received Group Membership reports.
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Passive – When passive IGMP mode is enabled, the device listens for IGMP Group
Membership reports but does not send IGMP queries. The passive mode is sometimes called
"IGMP snooping". Use this mode when another device in the network is actively sending
queries.
BigIron RX Series Configuration Guide
53-1001986-01