Brocade BigIron RX Series Configuration Guide - Manual (Page 817)

BigIron RX Series Configuration Guide 739
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Configuring IP multicast traffic reduction
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Syntax: [no] multicast pimsm-snooping
Configuring PIM proxy per VLAN instance
Using the PIM proxy function, multicast traffic can be reduced by configuring an BigIron RX switch
to issue PIM join and prune messages on behalf of hosts that the configured switch discovers
through standard PIM interfaces. The switch is then able to act as a proxy for the discovered hosts
and perform PIM tasks upstream of the discovered hosts. Where there are multiple PIM
downstream switches, this removes the need to send multiple messages.
To configure a BigIron RX switch to function as a PIM proxy on VLAN 2, use the following
commands.
(config)# vlan 2
(config-vlan-2)# multicast pim-proxy-enable
Syntax: [no] multicast pim-proxy-enable
Static IGMP membership
When configuring a static IGMP membership, you have two options.
The multicast static-group uplink command which sends the traffic to the switch, and saves a port.
The multicast static-group <group-address> <port-list> command is for downstream traffic and
uses a port.
Configuring a multicast static group uplink per VLAN
When the multicast static-group uplink command is enabled on a snooping VLAN, the snooping
device behaves like an IGMP host on ports connected to the multicast switch. The snooping device
will respond to IGMP queries from the uplink multicast PIM switch for the groups and sources
configured. Upon the multicast switch receiving the IGMP join message, it will initiate the PIM join
on its upstream path towards the source to pull the source traffic down. The source traffic will stop
at the IGMP snooping device. The traffic will then be forwarded to the multicast receiver and switch
ports or dropped in hardware if no other multicast receiver and switches are present in the VLAN.
The multicast static-group uplink command can be configured under the VLAN configuration only.
When using IGMP v3, you can use the multicast static-group include or multicast static-group
exclude command to statically include or exclude multicast traffic, respectively for hosts that
cannot signal group membership dynamically.
To configure the snooping device to statically join a multicast group on the uplink interface, enter
commands such as the following.
BigIron RX(config)# vlan 100
BigIron RX(config-vlan-100)# multicast static-group 224.10.1.1 uplink
To configure the physical interface 10.43.3.12 to statically join a multicast group on port 2/4, enter
commands such as the following.
BigIron RX(config)# vlan 100
BigIron RX((config-vlan-100)# multicast static-group 224.10.1.1 2/4