Configuring an EVC to Transmit Layer 2 Multicast Services
To improve network resource usage and implement on-demand multicast data forwarding in an EVC scenario, configure an EVC to transmit Layer 2 multicast services.
Context
On a Layer 2 multicast network, a Layer 2 device sets up mappings between interfaces and multicast MAC addresses by analyzing Internet Group Management Protocol (IGMP) packets transmitted between Layer 3 devices and users. The mapping information helps implement on-demand multicast data forwarding at the data link layer. If Layer 2 multicast devices use multiple different access modes on a network, service management and configuration are complicated and difficult. To resolve this issue, configure an EVC to transmit Layer 2 multicast services, implementing simplified network planning and management.
Procedure
- Run system-view
The system view is displayed.
- Run igmp-snooping enable
IGMP snooping is enabled globally.
- Run bridge-domain bd-id
The BD view is displayed.
- (Optional) Run igmp-snooping designated-vlan vlan-id
The transparent transmission function is enabled in the BD for IGMP snooping messages with a specified VLAN ID.
This command can be run only in the BD that contains dot1q sub-interfaces with the default traffic behavior.
- Run igmp-snooping enable
IGMP snooping is enabled in the BD view.
- Run interface interface-type interface-number.subnum mode l2
An EVC Layer 2 sub-interface is specified, and its view is displayed.
EVC Layer 2 multicast can be configured only for termination-type user sub-interfaces (If the traffic encapsulation type is untag, do not configure any traffic behavior; if the traffic encapsulation type is dot1q, configure the traffic behavior of pop single; if the traffic encapsulation type is QinQ, configure the traffic behavior of pop double). - (Optional) Run igmp-snooping static-router-port [ dot1q vid vid | qinq pe-vid pe-vid ce-vid ce-vid ]
A static router interface is specified.
To have multicast traffic received through a specific router interface, use this command to specify the interface.
- Run commit
The configuration is committed.