Enabling IPv6 multicast group replacement
About IPv6 multicast group replacement
If the number of IPv6 multicast groups on a port reaches the upper limit, the port automatically drops MLD reports for new groups. After you enable the IPv6 multicast group replacement feature, the port leaves an IPv6 multicast group that has the lowest IPv6 address and joins the new group contained in the MLD report. This feature is typically used in the channel switching application.
Restrictions and guidelines
This feature takes effect only on the multicast groups that the port joins dynamically.
This feature does not take effect if the following conditions exist:
The number of the MLD snooping forwarding entries on the device reaches or exceeds the upper limit.
The IPv6 multicast group that the port newly joins is not included in the multicast group list maintained by the device.
Enabling IPv6 multicast group replacement globally
Enter system view.
system-view
Enter MLD-snooping view.
mld-snooping
Enable IPv6 multicast group replacement globally.
overflow-replace [ vlan vlan-list ]
By default, IPv6 multicast group replacement is disabled globally.
Enabling IPv6 multicast group replacement on a port
Enter system view.
system-view
Enter Layer 2 interface view.
Enter Layer 2 Ethernet interface view.
interface interface-type interface-number
Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
Enable IPv6 multicast group replacement on the port.
mld-snooping overflow-replace [ vlan vlan-list ]
By default, IPv6 multicast group replacement is disabled on a port.