Configure Unicast Overlay Routing

Configure Unicast Overlay Routing

In Cisco SD-WAN Viptela, it support BGP and OSPF routing protocols. It establish routing on vEdge, on one VPN or multiple VPN, you must configured the interface under that VPN and a routing protocol under that VPN. On vSmart we don’t configure any routing protocols as this never participate in local site network.
OSPF configuration on vEdge:

Configure a VPN for the OSPF network:

VPN ID except VPN 0 and VPN512

Configure OSPF area 0 and the interfaces that participate in that area:

Redistribute OMP routes into OSPF:

By default, OMP routes are not redistributed into OSPF. Also if required configure OMP to advertise any BGP and OSPF external routes that the vEdge router has learned to the vSmart controller:

Example: configuration sets up VPN 20 with two interfaces, ge4/0 and ge5/0. It enables OSPF routing on those interfaces in area 0, and it redistributes the OMP routes from the vSmart controller into OSPF.

BGP configuration on vEdge:

Configure a VPN:

vpn-id can be any service-side VPN,

Configure BGP to run in the VPN | Configure the local AS number:

Configure the BGP peer, specifying its address and AS number (the remote AS number), and enable the
connection to the peer:

Configure a system IP address for the vEdge router:

Example :

Redistribute BGP Routes and AS Path Information

By default any routes learned from any other routing protocol are not redistributed to BGP. To redistribute OMP routes to BGP so that these prefixes are advertise to all BGP router present in service side network redistribution configuration is required except on VPN 0 and VPN 512