3Com Switch 8800 Advanced Software V5 Configuration Guide

MLD Snooping Configuration Task List 653
Processing of IPv6
Multicast Protocol
Messages
Under different conditions, an MLD Snooping-capable switch processes IPv6
multicast protocol messages differently, specifically as follows:
1 If only MLD is enabled, or both MLD and IPv6 PIM are enabled on the switch, the
switch handles IPv6 multicast protocol messages in the normal way.
2 In only IPv6 PIM is enabled on the switch:
■ The switch broadcasts MLD messages as unknown messages in the VLAN.
■ Upon receiving an IPv6 PIM hello message, the switch will maintain the
corresponding router port.
3 When MLD is disabled on the switch, or when MLD forwarding entries are cleared
(by using the reset mld group command):
■ If IPv6 PIM is disabled, the switch clears all its Layer 2 multicast entries and
router ports.
■ If IPv6 PIM is enabled, the switch clears only its Layer 2 multicast entries
without deleting its router ports.
4 When IPv6 PIM is disabled on the switch:
■ If MLD is disabled, the switch clears all its router ports.
■ If MLD is enabled, the switch maintains all its Layer 2 multicast entries and
router ports.
MLD Snooping
Configuration Task
List
Complete these tasks to configure MLD Snooping:
Task Remarks
“Configuring Basic Functions of
MLD Snooping” on page 654
“Enabling MLD Snooping”
on page 654
Required
“Configuring Port Aging
Timers” on page 655
Optional
“Configuring MLD Snooping Port
Functions” on page 656
“Configuring Static Ports”
on page 656
Optional
“Configuring Simulated
Joining” on page 656
Optional
“Configuring the Fast Leave
Feature” on page 657
Optional
“Configuring MLD Report
Suppression” on page 658
Optional
“Configuring MLD-Related
Functions” on page 659
“Enabling MLD Snooping
Querier” on page 659
Optional
“Configuring MLD Timers”
on page 659
Optional
“Configuring a Source IPv6
Address for MLD Queries”
on page 661
Optional
“Configuring the Function
of Dropping Unknown IPv6
Multicast Data” on page
661
Optional