Dell FCX624-S Laptop User Manual


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898 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuring MLD snooping
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The ipv6-address parameter is the IPv6 address of the multicast group.
The count is optional, which allows a contiguous range of groups. Omitting the count <num> is
equivalent to the count being 1.
If there are no <stack-unit/slot/port> numbers, the static groups apply to the entire VLAN.
Configuring static router ports
A device always forwards all multicast control and data packets to router ports that receive queries.
Although router ports are learned, you can configure static router ports to force multicast traffic to
specific ports, even though these ports never receive queries. To configure static router ports, enter
commands such as the following.
PowerConnect(config)#vlan 70
PowerConnect(config-vlan-70)#mld-snooping router-port e 0/1/4 to 0/1/5 e 0/1/8
Syntax: [no] mld-snooping router-port <stack-unit/slot/port>
Turning off static group proxy
A device with static groups configured acts as a proxy and sends membership reports for its static
groups when it receives general or group-specific queries. When a static group configuration is
removed, the group is deleted from active group table immediately. However, the device does not
send leave messages to the querier. The querier should age the group out. The proxy activity can be
turned off (the default is on). For example.
PowerConnect(config)#vlan 20
PowerConnect(config-vlan-20)#mld-snooping proxy-off
Syntax: [no] mld-snooping proxy-off
Enabling MLDv2 membership tracking and fast leave for the VLAN
MLDv2 provides membership tracking and fast leave services to clients. In MLDv1, only one client
per interface must respond to a router queries; leaving some clients invisible to the router, which
makes it impossible for the device to track the membership of all clients in a group. In addition,
when a client leaves the group, the device sends group-specific queries to the interface to see if
other clients on that interface need the data stream of the client who is leaving. If no client
responds, the device waits a few seconds before stopping the traffic. You can configure the wait
time with the ipv6 mld-snooping leave-wait-time command.
MLDv2 requires that every client respond to queries, allowing the device is able to track every
client. When the tracking feature is enabled, the device immediately stops forwarding traffic to the
interface if an MLDv2 client sends a leave message, and there is no other client. This feature
requires the entire VLAN to be configured for MLDv2 and have no MLDv1 clients. If a client does
not send a report during the specified group membership time (the default is 140 seconds), that
client is removed from the tracking list.