Platform Stop-Unreg-Mc-Flooding - Allied Telesis AT-IX5-28GPX Manual

S C
WITCHING OMMANDS
- - -
PLATFORM STOP UNREG MC FLOODING

platform stop-unreg-mc-flooding

Overview This command stops multicast packets flooding out of all the ports in the VLAN
until these packets are registered. This command does this by sending
unregistered multicast packets to the switch processor, so there is no flooding of
the multicast traffic onto the VLAN. Unregistered traffic will not flow until the
switch has registered it, regardless of attempts to subscribe to it. Once the traffic is
registered, it flows to registered subscribers and ports.
Use the no variant of this command to revert to default behavior and disable this
feature.
NOTE
IPv6 neighbor discovery operation is inhibited by this feature.
This command does not stop reserved Local Network Control Block IPv4 multicast
packets in the address range 224.0.0.1 to 224.0.0.255 (224.0.0/24).
See
www.iana.org/assignments/multicast-addresses/multicast-addresses.xml#multicast
-addresses-1
Syntax
platform stop-unreg-mc-flooding
no platform stop-unreg-mc-flooding
Default This feature is disabled by default.
Mode Global Configuration
Usage This command stops the periodic flooding of unknown or unregistered multicast
packets when the Group Membership interval timer expires and there are no
subscribers to a multicast group. If there is multicast traffic in a VLAN without
subscribers, multicast traffic temporarily floods out of the VLAN when the Group
Membership interval timer expires, which happens when the switch does not get
replies from Group Membership queries.
This command also stops the initial flood of multicast packets that happens when
a new multicast source starts to send traffic. This flooding lasts until snooping
recognizes the multicast group. For example, in sites where IP cameras have
multicast groups, traffic is flooded to the VLAN and causes large bursts of traffic.
Use this command when there is limited processing available for large bursts of
traffic, such as in sites with IP cameras.
Output See the console message warning about IPv6 operation after entering this
command:
376 Command Reference for AT-IX5-28GPX High Availability, High Power Video Surveillance PoE Switch
: This command should not be used within any IPv6 networks.
% WARNING: IPv6 will not work with this setting enabled
% Please consult the documentation for more information
AlliedWare Plus™ Operating System - Version 5.4.5-0.x
C613-50057-01 REV A