Configuring an H-VPN

On an H-VPN, SPEs function as RRs and UPEs function as RR clients. UPEs receive specific routes from SPEs.

For H-VPN networking, you must perform the following configurations:

Configure a VPN instance on each UPE and NPE. For configuration details, see Configuring a VPN Instance.
Configure an MP-BGP peer relationship between each SPE and NPE and between each UPE and SPE. This configuration is similar to configuring an MP-IBGP peer relationship between PEs on a BGP/MPLS IP VPN. For configuration details, see Establishing MP-IBGP Peer Relationships Between PEs.
Configure routing protocols for NPEs and UPEs to exchange routes with CEs. This configuration is similar to configuring PEs and CEs to exchange routes on a BGP/MPLS IP VPN. For configuration details, see Configuring Route Exchange Between PEs and CEs.
Configure SPEs as RRs and configure UPEs as RR clients.

Perform the following steps on each SPE.

Run system-view
The system view is displayed.
Run bgp as-number
The BGP view is displayed.
Run ipv4-family vpnv4
The BGP-VPNv4 address family view is displayed.
Run peer { ipv4-address | group-name } reflect-client
The SPE is configured as an RR and the UPEs are configured as RR clients.
Run peer { ipv4-address | group-name } next-hop-local
The SPE is configured to use its own IP address as the next hops of routes when advertising these routes.

To enable an SPE to use its own IP address as the next hops of routes when advertising these routes to UPEs and NPEs, run the peer next-hop-local command twice with different parameters specified on the SPE.
(Optional) Run apply-label per-nexthop
One-label-per-next-hop label distribution is enabled on the SPE.

In an H-VPN scenario, if an SPE needs to send large numbers of VPNv4 routes but the MPLS labels are inadequate, configure one-label-per-next-hop label distribution on the SPE.

After one-label-per-next-hop label distribution is enabled or disabled on an SPE, the labels assigned by the SPE to routes change. As a result, temporary packet loss may occur.
Run commit
The configuration is committed.