3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring an IPv6 Multicast Group Policy 661
Configuring a Source
IPv6 Address for MLD
Queries
This configuration allows you to change the source IPv6 address of MLD queries.
When a port receives an MLD general query with an all-zero IPv6 address, the
switch does not put it in its router port list. In a multicast network with only Layer
2 devices, therefore, it is recommended to configure a normal link-local IPv6
address as the source address of MLD query messages.
Follow these steps to configure source IPv6 addresses of MLD queries:
c
CAUTION: The source IPv6 address of MLD query messages may affect MLD
querier election within the segment.
Configuring the
Function of Dropping
Unknown IPv6 Multicast
Data
Unknown IPv6 multicast data refers to IPv6 multicast data whose forwarding
entries do not exist in the corresponding multicast forwarding table:
■ With the function of dropping unknown IPv6 multicast data enabled, the
switch drops the unknown IPv6 multicast data received.
■ With the function of dropping unknown IPv6 multicast data disabled, the
switch floods unknown IPv6 multicast data in the VLAN to which the unknown
IPv6 multicast data belongs.
Follow these steps to configure globally the function of dropping unknown IPv6
multicast data:
n
When enabled to drop unknown IPv6 multicast data, a Switch 8800 still forwards
unknown IPv6 multicast data to other router ports in the VLAN.
Configuring an IPv6
Multicast Group Policy
Configuration
Prerequisites
Before configuring an IPv6 multicast group filtering policy, complete the following
tasks:
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN view vlan vlan-id -
Configure the source IPv6
address of MLD general
queries
mld-snooping
general-query source-ip {
current-interface |
ipv6-address }
Optional
FE80::02FF:FFFF:FE00:0001 by
default
Configure the source IPv6
address of MLD group-specific
queries
mld-snooping
special-query source-ip {
current-interface |
ipv6-address }
Optional
FE80::02FF:FFFF:FE00:0001 by
default
To do... Use the command... Remarks
Enter system view system-view -
Enter MLD Snooping view mld-snooping -
Enable the function of
dropping unknown IPv6
multicast data
drop-unknown Required
Disabled by default