User's Manual

Configuration Guide of XGS-5240-Series
43-5
e IPv6. MLD is used by the network equipments such as routers which supports multic
ast for multicast listener discovery, also used by listeners looking forward to join certain
multicast group informing the router to receive data packets from certain multicast addr
ess, all of which are done through MLD message exchange. First the router send an
MLD Multicast listener Query message through a multicast address which can address
all the listeners (namely ff02::1). Once there is a listener who wishes to join the multic
ast address, it will send a MLD Multicast listener Report back through the multicast ad
dress.
MLD Snooping is namely the MLD listening. The switch restricts the multicast traffic
from flooding through MLD Snooping, and forward the multicast traffic to ports associat
ed to multicast devices only. The switch listens to the MLD messages between multicas
t routers and listeners, and maintains the multicast group forwarding list based on the li
stening result. The switches forwards multicast packets according to the multicast forwar
ding list
The switch realizes the MLD Snooping function while supporting MLD v2. This way,
the user can acquire IPv6 multicast with the switch.
43.2.2 MLD Snooping Configuration Task
1. Enable the MLD Snooping function
2. Configure the MLD Snooping
1. Enable the MLD Snooping function
Command
Explanation
Global Mode
ipv6 mld snooping
no ipv6 mld snooping
Enable global MLD Snooping, the “no ip
v6 mld snooping” command disables th
e global MLD snooping.
2. Configure MLD Snooping
Command
Explanation
Global Mode
ipv6 mld snooping vlan <vlan-id>
no ipv6 mld snooping vlan <vlan-i
d>
Enable MLD Snooping on specific VLAN. The “n
o” form of this command disables MLD Snoopin
g on specific VLAN.
ipv6 mld snooping vlan <vlan-id>
limit {group <g_limit> | source <s
_limit>}
no ipv6 mld snooping vlan <vlan-i
Configure the number of the groups in which th
e MLD Snooping can join, and the maximum nu
mber of sources in each group. The “no” form o
f this command restores to the default.