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NE40E V800R010C10SPC500 Configuration Guide - IP Multicast 01

This is NE40E V800R010C10SPC500 Configuration Guide - IP Multicast
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Configuring Longest Match for Multicast Route Selection

Configuring Longest Match for Multicast Route Selection

If the longest match principle is configured for route selection, an optimal intra-domain unicast route, an optimal inter-domain unicast route, and an optimal multicast static route are selected. One of the them is finally selected as the multicast data forwarding path.

Context

NOTE:

Configurations related to VPN instances apply only to PE devices. When configuring the longest match of multicast routes for a VPN instance on a PE, perform the configuration in the VPN instance. In other cases, the longest match is configured in the public network instance.

If the longest match principle is configured for route selection, a multicast device prefers the route with the longest matched mask. If the mask lengths of multiple routes are the same, the device selects a route as the multicast data forwarding path in the order of the static multicast route, inter-domain unicast route, and intra-domain unicast route.

By default, a route with the highest priority is selected.

Perform the following steps on the multicast router:

Procedure

  • Configure longest match of multicast routes in the public network instance.
    1. Run system-view

      The system view is displayed.

    2. Run multicast longest-match

      Routes are selected based on the longest match rule.

    3. Run commit

      The configuration is committed.

  • Configure longest match of multicast routes in the VPN instance.
    1. Run system-view

      The system view is displayed.

    2. Run ip vpn-instance vpn-instance-name

      The VPN instance view is displayed.

    3. Run multicast longest-match

      Routes are selected based on the longest match rule.

    4. Run commit

      The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055017

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