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NE40E V800R010C10SPC500 Configuration Guide - IP Multicast 01

This is NE40E V800R010C10SPC500 Configuration Guide - IP Multicast
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Configuring Layer 2 Multicast Instances

Configuring Layer 2 Multicast Instances

If users in different VLANs or VSIs request for the same multicast group's data from the same source, configure a Layer 2 multicast instance on the Layer 2 device.

Context

In conventional multicast on-demand mode, if users of a Layer 2 multicast device in different VLANs or VSIs request for the same multicast group's data from the same source, the connected upstream Layer 3 device has to send a copy of each multicast flow of this group for each VLAN or VSI. Such implementation wastes bandwidth resources and burdens the upstream device.

To resolve these issues, configure a Layer 2 multicast instance on the Layer 2 multicast device. Then, the Layer 2 device requests for only one copy of the group's flow for all such users from the connected Layer 3 device.

With a Layer 2 multicast instance configured:
  • Multicast data can be replicated on a VPLS network and be replicated from a VPLS network to a VLAN.
  • Channels that consist of multiple multicast groups can be specified for the Layer 2 multicast instance, facilitating the management of replicated multicast data flows.

For example, on the network shown in Figure 18-13, users in VLAN 11 and VLAN 22 request for data of the same multicast group from the same source. In this scenario, create a VLAN (for example, VLAN 3) and configure the VLAN as a multicast VLAN on the CE. Associate VLAN 3 with VLAN 11 and VLAN 22. Then, the CE requests for only a single copy of the data flow from the PE, and replicates separate copies for VLAN 11 and VLAN 22.

Figure 18-13 Multicast replication before and after a Layer 2 multicast instance is configured

NOTE:

The CE in the figure represents a Layer 2 device on which Layer 2 multicast replication needs to be deployed.

Configuration Process

Perform one or more of the following configurations as required.

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Updated: 2019-01-03

Document ID: EDOC1100055017

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