Configuring Unified Routing

The BLs must be configured with BGP VPNv4/VPNv6 peering. MPLS tunnels (LDP or RSVP) must be configured between the BL nodes of Interconnecting DCs. The next-hops of the BGP VPNv4/VPNv6 routes received from the remote BL should be reachable through these tunnels.

To configure Unified Routing:

On the Local BL, in the L2VPN EVPN address family, configure importing VPNv4 or VPNv6 routes. You can choose to import both these route types.
```
SLX(config)# router bgp
SLX(config-bgp-router)# address-family l2vpn evpn
SLX(config-bgp-evpn)# import vpnv4 unicast reoriginate
SLX(config-bgp-evpn)# import vpnv6 unicast reoriginate
                    
```
On successful completion of this command, the VPNv4 and VPNv6 routes that are installed in the local VRF(s) are re-exported to EVPN RIB IN and advertised as EVPN type-5 prefix routes inside the IP fabric.
On the Local BL, each address family (VPNv4/VPNv6) must be configured to import and re-originate the BGP EVPN type-5 prefixes.
```
SLX(config)# router bgp
SLX(config-BGP-router)# address-family vpnv4 unicast
SLX(config-BGP-vpnv4u)# import l2vpn evpn reoriginate 
SLX(config-BGP-vpnv4u)# exit 
SLX(config-BGP-router)# address-family vpnv6 unicast
SLX(config-BGP-vpnv6u)# import l2vpn evpn reoriginate 
SLX(config-BGP-vpnv6u)# exit 
SLX(config-BGP-router)# 
                    
```
On successful completion of these configurations, the EVPN type-5 prefix routes that are installed in the local VRF(s) are re-originated and advertised as L3VPN NLRI to BGP VPNv4/VPNv6 peers.

The DC BL will now be capable of performing VXLAN MPLS inter-working in the data path. The BL terminates VXLAN encapsulation from EVPN fabric and does MPLS switching over the WAN.