Chapter 24
| Multicast Filtering Commands
MLD Proxy Routing
– 790 –
Command Mode
Interface Configuration (VLAN)
Command Usage
â—† 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.
â—† 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.
â—† When changes occur in the downstream MLD groups, an MLD state change
report is created and sent to the upstream router.
â—† 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.
â—† Multicast routing protocols are not supported on interfaces where MLD proxy
service is enabled.
â—† Only one upstream interface is supported on the system.
â—† MLD and MLD proxy cannot be enabled on the same interface.
â—† A maximum of 1024 multicast streams are supported.
Example
The following example enables multicast routing globally on the switch, configures
VLAN 2 as a downstream interface, and then VLAN 1 as the upstream interface.
Console(config)#ip multicast-routing
Console(config)#interface vlan2
Console(config-if)#ipv6 mld
Console(config-if)#exit
Console(config)#interface vlan1
Console(config-if)#ipv6 mld proxy
Console(config-if)#
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