HP 6125G - Configuring MLD Snooping Querier; Enabling MLD Snooping Querier

217
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.
To disable a port from becoming a dynamic router port:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
interface interface-type
interface-number
Use either command.
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 MLD snooping querier
Before you configure MLD snooping querier, complete the following tasks:
• Enable MLD snooping in the VLAN.
• Determine the MLD general query interval.
• Determine the MLD last-member query interval.
• Determine the maximum response time for MLD general queries.
• Determine the source IPv6 address of MLD general queries.
• Determine the source IPv6 address of MLD multicast-address-specific queries.
Enabling MLD snooping querier
In an IPv6 multicast network that runs MLD, a multicast router or Layer 3 multicast switch sends MLD
queries, so that all Layer 3 multicast devices can establish and maintain multicast forwarding entries, in
order to forward multicast traffic correctly at the network layer. This router or Layer 3 switch is called the
"MLD querier." For more information about MLD querier, see "Configuring MLD."
H
owever, a Layer 2 multicast switch does not support MLD. Therefore, it cannot send MLD general
queries by default. When you enable MLD snooping querier on a Layer 2 switch in a VLAN where
multicast traffic is switched only at Layer 2 and no Layer 3 multicast devices are present, the Layer 2
switch sends MLD queries, so that multicast forwarding entries can be created and maintained at the
data link layer.
IMPORTANT:
It is meaningless to configure an MLD snooping querier in an IPv6 multicast network that runs MLD.
A
lthou
g
h an MLD snooping querier does not participate in MLD querier elections, it might affect MLD
querier elections because it sends MLD general queries with a low source IPv6 address.
To enable the MLD snooping querier: