ECS4660-28F_Management Guide-R03

C HAPTER 43 | Multicast Filtering Commands
MLD Proxy Routing
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To enable MLD proxy service, follow these steps:
1. Use the ipv6 multicast-routing command to enable IP multicasting
globally on the router.
2. Use the ipv6 mld proxy command to enable MLD proxy on the upstream
interface that is attached to an upstream multicast router.
3. Use the ipv6 mld command to enable MLD on the downstream
interfaces from which to forward MLD membership reports.
4. Optional – Use the ipv6 mld proxy unsolicited-report-interval command
to indicate how often the system will send unsolicited reports to the
upstream router.
ipv6 mld proxy This command enables MLD proxy service for multicast routing, forwarding
MLD membership information monitored on downstream interfaces onto
the upstream interface in a summarized report. Use the no form to disable
proxy service.
SYNTAX
[no] ipv6 mld proxy
DEFAULT SETTING
Disabled
COMMAND MODE
Interface Configuration (VLAN)
COMMAND USAGE
◆ When MLD proxy is enabled on an interface, that interface is known as
the upstream or host interface. This interface performs only the host
portion of MLD by sending MLD membership reports, and automatically
disables MLD router functions.
◆ Interfaces with MLD enabled, but not located in the direction of the
multicast tree root are known as downstream or router interfaces.
These interfaces perform the standard MLD router functions by
maintaining a database of all MLD subscriptions on the downstream
interface. MLD must therefore be enabled on all downstream interfaces
which require proxy multicast service.
◆ When changes occur in the downstream MLD groups, an MLD state
change report is created and sent to the upstream router.
◆ If there is an MLDv1 querier on the upstream network, then the proxy
device will act as an MLDv1 host on the upstream interface accordingly.
Otherwise, it will act as an MLDv2 host.
◆ Multicast routing protocols are not supported on interfaces where MLD
proxy service is enabled.