H3C S5500-EI - Protocols and Standards; MLD Configuration Task List

344
As shown in Figure 88, an MLD proxy device has the following types of interfaces:
• Upstream interface—Also called the "proxy interface." A proxy interface is an interface on which
MLD proxying is configured. It is in the direction toward the root of the multicast forwarding tree. An
upstream interface acts as a host that is running MLD, and is also called a "host interface."
• Downstream interface—An interface that is running MLD and not in the direction toward the root of
the multicast forwarding tree. A downstream interface acts as a router that is running MLD, and is
also called a "router interface."
A device with MLD proxying configured maintains a group membership database, which stores the
group memberships on all the downstream interfaces in this database. Each entry comprises the multicast
address, filter mode, and source list. Such an entry is a collection of members in the same multicast group
on each downstream interface.
A proxy device performs host functions on the upstream interface based on the database. It responds to
the queries according to the information in the database or sends join/leave messages when the
database changes. The proxy device performs router functions on the downstream interfaces by
participating in the querier election, sending queries, and maintaining memberships based on the
reports.
Protocols and standards
• RFC 2710, Multicast Listener Discovery (MLD) for IPv6
• RFC 3810, Multicast Listener Discovery Version 2 (MLDv2) for IPv6
• RFC 4605, Internet Group Management Protocol (IGMP)/Multicast Listener Discovery (MLD)-Based
Multicast Forwarding ("IGMP/MLD Proxying")
MLD configuration task list
Task Remarks
Configuring basic MLD functions
Enabling MLD Required
Configuring the MLD version Option
Configuring static joining Optional
Configuring an IPv6 multicast group filter Optional
Setting the maximum number of IPv6 multicast
groups that an interface can join
Optional
Adjusting MLD performance
Configuring Router-Alert option handling
methods
Optional
Configuring MLD query and response
parameters
Optional
Configuring MLD fast-leave processing Optional
Enabling the MLD host tracking function Optional
Setting the DSCP value for MLD messages Optional