H3C Technologies H3C S10500 Series Switches - Manual (Page 283)

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To do... Use the command... Remarks
Enter system view system-view —
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
Required
Use either command
Enable fast-leave processing
mld-snooping fast-leave [ vlan
vlan-list ] Required
Disabled by default.
Disabling a port from becoming a dynamic router port
The following problems 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 where the port belongs, 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, and
might further cause network interruption.
To solve these problems, disable that router port from becoming a dynamic router port after the port
receives an MLD general query or IPv6 PIM hello message, so as to improve network security and control
over multicast users.
Follow these steps to disable a port from becoming a dynamic router port:
To do... Use the command... Remarks
Enter system view system-view —
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
Required
Use either command
Disable the port from becoming
a dynamic router port mld-snooping router-port-deny [ vlan
vlan-list ]
Required
By default, a port can
become a dynamic router
port.
NOTE:
This configuration does not affect the static router port configuration.