Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 144)

132 Multi-Service IronWare Multicast Configuration Guide
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IP multicast traffic reduction
1
Brocade(config)# vlan 2
Brocade(config-vlan-2)# multicast passive
To remove multicast traffic reduction configurations in VLAN 2, and take the global multicast traffic
reduction configuration, enter the following command.
Brocade(config)# vlan 2
Brocade(config-vlan-2)# no multicast
In the following example, multicast traffic reduction is applied using IGMP snooping to VPLS
instance V1.
Brocade(config)# router mpls
Brocade(config-mpls)# vpls v1 10
Brocade(config--mpls-vpls-v1)# multicast passive
Syntax: [no] multicast active | passive
When you enable IP multicast for a specific VLAN or VPLS instance, IGMP snooping is enabled. The
device uses IGMP to maintain a table of the Group Membership reports received by the device for
the specified VLAN or VPLS instance. You can use active or passive IGMP mode. There is no default
mode.
The description for the IGMP modes is as follows:
• Active – When active IGMP mode is enabled, the router actively sends out IGMP queries to
identify IP multicast groups within the VLAN or VPLS instance and makes entries in the IGMP
table based on the Group Membership reports received from the network.
• Passive – When passive IGMP mode is enabled, the router listens for IGMP Group Membership
reports on the VLAN or VPLS instance specified but does not send IGMP queries. The passive
mode is called “IGMP snooping”. Use this mode when another device in the VLAN or VPLS
instance is actively sending queries.
Configuring the PIM SM traffic snooping per VLAN or VPLS instance
In the following example, multicast traffic reduction is applied using PIM SM Traffic snooping to
VLAN 2.
Brocade(config)# vlan 2
Brocade(config-vlan-2)# multicast pimsm-snooping
In the following example, multicast traffic reduction is applied using PIM SM traffic snooping to
VPLS instance V1.
Brocade(config)# router mpls
Brocade(config-mpls)# vpls v1 10
Brocade(config--mpls-vpls-v1)# multicast pimsm-snooping
Syntax: [no] multicast pimsm-snooping
Configuring PIM proxy per VLAN or VPLS instance
Using the PIM proxy function, multicast traffic can be reduced by configuring an Brocade device to
issue PIM join and prune messages on behalf of hosts that the configured router discovers through
standard PIM interfaces. The router 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
routers, this removes the need to send multiple messages.
To configure a Brocade device to function as a PIM proxy on VLAN 2, use the following commands.