315
Enabling MLD snooping fast-leave processing on a port
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view or
enter 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 approach.
3.
Enable MLD snooping
fast-leave processing.
mld-snooping fast-leave
[
vlan
vlan-list
]
Disabled by default.
Disabling a port from becoming a dynamic router port
The following problems might exist in a multicast access network:
•
After receiving an MLD general query or IPv6 PIM hello message from a connected host, a
router port becomes a dynamic router port. Before its timer expires, this dynamic router port
receives all multicast packets within the VLAN that the port belongs to and forwards them to the
host, affecting normal multicast reception of the host.
•
In addition, the MLD general query and IPv6 PIM hello message that the host sends affects the
multicast routing protocol state on Layer 3 devices, such as the MLD querier or DR election.
They might cause network interruption.
To solve these problems, after the router port receives an MLD general query or IPv6 PIM hello
message, disable the port from becoming a dynamic router port. This enhances network security and
the control over multicast users.
To disable a port from becoming a dynamic router port:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view
or enter 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 approach.
3.
Disable the port from
becoming a dynamic
router port.
mld-snooping router-port-deny
[
vlan
vlan-list
]
By default, a port can
become a dynamic router
port.
NOTE:
This configuration does not affect the static router port configuration.
Configuring an MLD snooping querier
This section describes how to configure an MLD snooping querier.
