Configuring UMH Route Selection Rules
This section describes how to configure upstream multicast hop (UMH) route selection rules on receiver PEs on an NG MVPN, so that the receiver PEs can select the same sender PE as their root node during VPN route selection.
Context
On an NG MVPN, when multiple sender PEs exist, receiver PEs select routes based on preferred unicast routes by default. In this case, different receiver PEs select different sender PEs as their root nodes. This requires multiple P2MP tunnels to be established. As a result, many public network tunnel resources are consumed. To resolve the preceding issue, enable the highest IP address to be selected as the UMH on receiver PEs, so that the receiver PEs select the same sender PE as their root node during VPN route selection.
Perform the following steps in the VPN instance MVPN view of a PE.
Procedure
- Run system-view
The system view is displayed.
- Run ip vpn-instance vpn-instance-name
The VPN instance view is displayed.
- Run ipv4-family
The VPN instance IPv4 address family view is displayed.
- Run mvpn
The VPN instance IPv4 address family MVPN view is displayed.
- Run umh-select highest-ip
The maximum IP address is selected as the UMH in an MVPN instance.
- Run commit
The configuration is committed.