Configuring VXLAN BGP EVPN

I’m looking forward to setting up a Nexus 9k Solution, L3 using VXLAN BGP EVPN Topology Dual DataCentre configuration. Aiming for a Live/Live Core between the two. Only caveat is we will stick to L2 supporting the Edge, for Internet and IPWAN connections using traditional technologies such as HSRP.

VXLAN BGP EVPN…..Configuration guide

MP-eBGP Configuration

Some information on how to configure multiprotocol extended Border Gateway Protocol (MP-EBGP). Extended BGP allows for the transport of routing information for multiple network layer protocols IPv6, VPNv4, and others. MP-BGP allows you to have a unicast routing topology different from a multicast routing topology, which helps to control the network and resources.

In this example, the R1 and R3 routers are configured to be in AS 5500 forming iBGP. The R2 router is configured to be in AS 6500. The R1 and R2 routers communicate with each other using MP-EBGP.

MP-BGP Config

More BGP next-hop-self

From the below you can see the next hop for network is which is outsite of 65000 AS, and router jazz doesn’t have a route to it.  BGP will not put into routing table because it doesn’t know how to reach next hop, you can see this below:

BGP-Next Hp Self 2

BGP-Next Hp Self 3

BGP-Next Hp Self 4

By adding the next-hop-self command on the router owen it will change the next-hop attribute for external networks that will be advertised to the router Jazz:

owen(config-router)#neighbour next-hop-self

BGP-Next Hp Self 4.5

This changes the next hop attribute from to be on the router owen

BGP-Next Hp Self 5

from Jazz you can now ping ( on Jules.

BGP-Next Hp Self 6

Job done!

BGP Peer Group Configuration

Basic config for a BGP Peer Group within an AS 123 and some iBGP routers.  The config uses peer-group and route reflectors which saves you a lot of configuration on all the iBGP devices.

BGP-Peer Group