Web Management Guide-R02

Table Of Contents
Chapter 14
| Multicast Filtering
MLD Snooping (Snooping and Query for IPv6)
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Figure 356: Configuring General Settings for MLD Snooping
Setting Immediate
Leave Status for
MLD Snooping
per Interface
Use the Multicast > MLD Snooping > Interface page to configure Immediate Leave
status for a VLAN.
Parameters
These parameters are displayed:
VLAN – A VLAN identification number. (Range: 1-4094)
Immediate Leave – Immediately deletes a member port of an IPv6 multicast
service when a leave packet is received at that port and immediate leave is
enabled for the parent VLAN. (Default: Disabled)
If MLD immediate-leave is not used, a multicast router (or querier) will send a
group-specific query message when an MLD group leave message is received.
The router/querier stops forwarding traffic for that group only if no host replies
to the query within the specified timeout period.
If MLD immediate-leave is enabled, the switch assumes that only one host is
connected to the interface. Therefore, immediate leave should only be enabled
on an interface if it is connected to only one MLD-enabled device, either a
service host or a neighbor running MLD snooping.
Immediate Leave By Host – Specifies that the member port will be deleted
only when there are no hosts joining this group.
If the “By Host” option is used, the router/querier will not send out a group-
specific query when an MLD leave message is received. But will check if there
are other hosts joining the multicast group. Only when all hosts on that port
leave the group will the member port be deleted.