(Optional) Enabling Direct ND Entry Delivery

Context

In a scenario of mutual access between IPv6 VPNs, traffic initiated during mutual access for the first time will trigger ND Miss messages and ND entry learning. If a PE device fails to process the ND Miss messages in time (for example, when a new card is installed), mutual access traffic between the VPNs cannot be transmitted.

After direct ND entry delivery for mutual access between IPv6 VPNs is enabled on the PE device, the device delivers ND entries in advance when a new card is installed without the need to trigger mutual access traffic. This ensures proper transmission of mutual access traffic between local VPNs.

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720S-EI, S6720-EI, S6720-HI, S6730S-H, and S6730-H support this command.

Procedure

1. Run system-view

   The system view is displayed.

2. Run nd vpn-cross enable

   Direct ND entry delivery for mutual access between IPv6 VPNs is enabled.