Configuring EVPN VXLAN External Connectivity Configuring BGP on a Border VTEP for External Connectivity with MPLS Layer 3 VPN Command or Action Purpose Step 3 router bgp autonomous-system-number Example: Device(config)# router bgp 1 Enables a BGP routing process, assigns it an autonomous system number, and enters router configuration mode. Step 4 bgp log-neighbor-changes Example: Device(config-router)# bgp log-neighbor-changes (Optional) Enables the generation of logging messages when the status of a BGP neighbor changes. For more information, see Configuring BGP section of the IP Routing Configuration Guide. Step 5 bgp update-delay time-period Example:
Device(config-router)# bgp update-delay 1 (Optional) Sets the maximum initial delay period before sending the first update. For more information, see Configuring BGP section of the IP Routing Configuration Guide. Step 6 bgp graceful-restart Example: Device(config-router)# bgp graceful-restart (Optional) Enables the BGP graceful restart capability for all BGP neighbors. For more information, see Configuring BGP section of the IP Routing Configuration Guide. Step 7 no bgp default ipv4-unicast Example: Device(config-router)# no bgp default ipv4-unicast (Optional) Disables default IPv4 unicast address family for BGP peering session establishment.
For more information, see Configuring BGP section of the IP Routing Configuration Guide. Step 8 neighbor spine-ip-address remote-as number Example: Device(config-router)# neighbor 172.16.255.1 remote-as 1 Defines multiprotocol-BGP neighbors in the EVPN network. Use the IP address of the spine switch as the neighbor IP address. This configures the spine switch as a BGP neighbor. Step 9 neighbor mpls-peer-ip-address remote-as number Example: Device(config-router)# neighbor 172.16.255.103 remote-as 1 Defines multiprotocol-BGP neighbors in the external MPLS network. Use the IP address of the external MPLS network peer as the neighbor IP address.
This configures the external MPLS network peer as a BGP neighbor. Step 10 neighbor {ip-address | group-name}update-source interface Example: Device(config-router)# neighbor 172.16.255.1 update-source Loopback0 Configures update source. Update source can be configured per neighbor or per peer-group. Use the IP address of the spine switch as the neighbor IP address. Configuring EVPN VXLAN External Connectivity 12