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Step Command
Remarks
2.
Enter Layer 2 Ethernet
interface view, Layer 2
aggregate interface view, or
port group view.
•
Enter Layer 2 Ethernet interface
view or Layer 2 aggregate
interface view:
interface
interface-type
interface-number
•
Enter port group view:
port-group
manual
port-group-name
Use either command.
3.
Enable IPv6 multicast group
replacement.
mld-snooping overflow-replace
[
vlan
vlan-list
]
Disabled by default.
Setting the 802.1p precedence for MLD messages
You can change the 802.1p precedence of MLD messages so that they can be assigned higher
forwarding priority when congestion occurs on their outgoing ports.
Setting the 802.1p precedence for MLD messages globally
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter MLD-snooping view.
mld-snooping
N/A
3.
Set the 802.1p precedence
for MLD messages.
dot1p-priority
priority-number
The default 802.1p precedence for
MLD messages is 0.
Setting the 802.1p precedence for MLD messages in a VLAN
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter VLAN view.
vlan
vlan-id
N/A
3.
Set the 802.1p precedence
for MLD messages.
mld-snooping dot1p-priority
priority-number
The default 802.1p precedence for
MLD messages is 0.
Configuring an IPv6 multicast user control policy
IPv6 multicast user control policies are configured on access switches to allow only authorized users to
receive requested IPv6 multicast data. This helps restrict users from ordering certain multicast-on-demand
programs.
In practice, a device first needs to perform authentication (for example, 802.1X authentication) for the
connected hosts through a RADIUS server. Then, the device uses the configured multicast user control
policy to perform multicast access control for authenticated users as follows.
•
After receiving an MLD report from a host, the access switch matches the IPv6 multicast group
address and multicast source address carried in the report with the configured policies. If a match
