Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 206)

194 Multi-Service IronWare Multicast Configuration Guide
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IPv6 Multicast Listener Discovery snooping
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Globally configuring the age interval
When the device receives a Group Membership report, the device makes an entry in the MLD 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 configure the age interval, enter a command such as the following.
Brocade(config)# ipv6 multicast age-interval 280
Syntax: [no] ipv6 multicast age-interval interval
The interval parameter specifies the interval between queries. You can specify a value from 10
through 1220 seconds. The default is 260 seconds.
Filtering multicast groups
By default, the device forwards multicast traffic for all valid multicast groups. You can configure a
device to filter out all multicast traffic for groups other than the ones for which the device has
received Group Membership reports.
When the device starts up, it forwards all multicast groups even though multicast traffic filters are
configured. This process continues until the device receives a Group Membership report. Once the
Group Membership report is received, the device drops all multicast packets for groups other than
the ones for which the device has received the Group Membership report.
To enable IPv6 multicast filtering, enter the following command.
Brocade(config)# ipv6 multicast filter
Syntax: [no] ipv6 multicast filter
Setting PIM proxy interval
NOTE
The PIM proxy interval value should not be changed. Changing the PIM proxy interval value is not
supported.
The PIM proxy interval specifies the time interval in seconds between the PIM proxy and join
messages.
To set the time interval between PIM proxy messages, enter the following command.
Brocade(config)# ipv6 multicast pim-proxy-interval 10
Syntax: ipv6 multicast pim-proxy-interval interval
The interval parameter specifies the interval between PIM proxy messages. You can specify a value
from 10 through 600 seconds.
PIM-SM traffic snooping
By default, when a device receives an IPv6 multicast packet, the device does not examine the
multicast information in the packet. Instead, the device simply forwards the packet out to all ports
except the port that received the packet. In some networks, this method can cause unnecessary
traffic overhead in the network. For example, if the device is attached to only one group source and
two group receivers, but has devices attached to every port, the device forwards group traffic out all
ports in the same broadcast domain except the port attached to the source, even though there are
only two receivers for the group.