Limiting Mld Multicast Groups - Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual

Configuring IP Multicast Switching
Disabling the MLD Zapping
To disable MLD zapping on the system if no VLAN or SPB service is specified, use the
zapping command as shown below:
-> ipv6 multicast zapping disable
Or, as an alternative, enter the following command to restore MLD zapping to its default setting:
-> no ipv6 multicast zapping
You can also disable MLD zapping on the specified VLAN or SPB service by entering:
-> ipv6 multicast vlan 2 zapping disable
-> ipv6 multicast service 10 zapping disable
Or, as an alternative, enter the following commands to restore MLD zapping to its default setting:
-> no ipv6 multicast vlan 2 zapping
-> no ipv6 multicast service 10 zapping

Limiting MLD Multicast Groups

By default there is no limit on the number of MLD groups that can be learned on a port/VLAN/SPB
service instance. A maximum group limit can be set on a port, VLAN, SPB service, or on a global level to
limit the number of MLD groups that can be learned. Once the configured limit is reached, a configurable
action decides whether the new MLD report is dropped or replaced an existing MLD membership.
The maximum group limit can be applied globally, per VLAN, per SPB service, or per port. Port settings
override VLAN and SPB service settings, which override global settings.
If the maximum number of groups is reached an action can be configured to either drop the new
membership request or replace an existing group membership as show below.
Setting the MLD Group Limit
To set the MLD global group limit and drop any requests above the limit, use the
group command as shown below:
-> ipv6 multicast max-group 25 action drop
To set the MLD group limit for a VLAN or SPB service and replace any requests above the limit, use the
ipv6 multicast max-group
-> ipv6 multicast vlan 2 max-group 25 action replace
-> ipv6 multicast service 10 max-group 25 action replase
To set the MLD group limit for a port and drop any requests above the limit, use the
max-group command as shown below:
-> ipv6 multicast port 1/1 max-group 25 action drop
In the above example, 1/1/23:10 serves as a SAP ID in an SPB network. A SAP ID is comprised of an
access port number (1/1/23) and an encapsulation value (10). Traffic received on access port 1/1/23 that is
tagged with VLAN 10 is encapsulated and then forwarded on the SPB service that is associated with the
SAP. Refer to Chapter 10, "Service Manager Commands,"
OmniSwitch AOS Release 8 Network Configuration Guide
command as shown below:
Modifying IPMSv6 Parameters
for more information.
December 2017
ipv6 multicast
ipv6 multicast max-
ipv6 multicast port
page 25-41