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Examples
# Configure to allow up to 10 IPv6 multicast groups that Ethernet 1/0/1 in VLAN 2 can join.
<Sysname> system-view
[Sysname] interface ethernet 1/0/1
[Sysname-Ethernet1/0/1] mld-snooping group-limit 10 vlan 2
mld-snooping group-policy
Syntax
mld-snooping group-policy acl6-number [ vlan vlan-list ]
undo mld-snooping group-policy [ vlan vlan-list ]
View
Layer 2 Ethernet interface view, Layer 2 aggregate interface view, port group view
Default level
2: System level
Parameters
acl6-number: Specifies a basic or advanced IPv6 ACL number, in the range of 2000 to 3999. The IPv6
source address or address range specified in the advanced IPv6 ACL rule is the IPv6 multicast source
addresses specified in MLDv2 reports, rather than the source address in the IPv6 packets. The system
assumes that an MLDv1 report or an MLDv2 IS_EX or TO_EX report that does not carry an IPv6 multicast
source address carries an IPv6 multicast source address of 0::0.
vlan vlan-list: Specifies one or multiple VLANs. You can provide up to 10 VLAN lists. For each list, you
can specify an individual VLAN in the form of vlan-id, or a VLAN range in the form of start-vlan-id to
end-vlan-id, where the end VLAN ID must be greater than the start VLAN ID. The value range of a VLAN
ID is 1 to 4094.
Description
Use mld-snooping group-policy to configure an IPv6 multicast group filter on the current ports, namely,
to control the multicast groups that the hosts on the port can join.
Use undo mld-snooping group-policy to remove the configured IPv6 multicast group filter on the current
port or ports.
By default, no IPv6 multicast group filter is configured on a port. Namely, a host can join any valid IPv6
multicast group.
If you do not specify any VLAN when using this command in Layer 2 Ethernet interface view or Layer 2
aggregate interface view, the command takes effect for all VLANs that the interface belongs to. If you
specify one or multiple VLANs, the command takes effect for the specified VLANs that the interface
belongs to.
If you do not specify any VLAN when using this command in port group view, the command takes effect
on all the ports in this group. If you specify one or multiple VLANs, the command takes effect only on
those ports in this group that belong to the specified VLANs.
If the specified ACL does not exist or the ACL rule is null, all IPv6 multicast groups are filtered out.
You can configure different IPv6 ACL rules for each port in different VLANs. For a given VLAN, a newly
configured IPv6 ACL rule overrides the existing one.
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