Connectivity Guide

2. Congure the underlay OSPF protocol
OS10(config)# router ospf 1
OS10(config-router-ospf-1)# router-id 25.1.1.1
OS10(config-router-ospf-1)# exit
Spine Switch 2
1. Congure downstream ports on underlay links to leaf switches
OS10(config)# interface ethernet1/1/1
OS10(conf-if-eth1/1/1)# no shutdown
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# ip address 12.1.1.2/24
OS10(conf-if-eth1/1/1)# ip ospf 1 area 0.0.0.0
OS10(conf-if-eth1/1/1)# exit
OS10(config)# interface ethernet1/1/2
OS10(conf-if-eth1/1/2)# no shutdown
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# ip address 14.1.1.2/24
OS10(conf-if-eth1/1/2)# ip ospf 1 area 0.0.0.0
OS10(conf-if-eth1/1/2)# exit
OS10(config)# interface ethernet1/1/3
OS10(conf-if-eth1/1/3)# no shutdown
OS10(conf-if-eth1/1/3)# no switchport
OS10(conf-if-eth1/1/3)# ip address 16.1.1.2/24
OS10(conf-if-eth1/1/3)# ip ospf 1 area 0.0.0.0
OS10(conf-if-eth1/1/3)# exit
OS10(config)# interface ethernet1/1/4
OS10(conf-if-eth1/1/4)# no shutdown
OS10(conf-if-eth1/1/4)# no switchport
OS10(conf-if-eth1/1/4)# ip address 18.1.1.2/24
OS10(conf-if-eth1/1/4)# ip ospf 1 area 0.0.0.0
OS10(conf-if-eth1/1/4)# exit
2. Congure the underlay OSPF protocol
OS10(config)# router ospf 1
OS10(config-router-ospf-1)# router-id 26.1.1.1
OS10(config-router-ospf-1)# exit
BGP EVPN for VXLAN
Ethernet Virtual Private Network (EVPN) is a control plane for VXLAN that is used to reduce ooding in the network and resolve scalability
concerns. EVPN uses MP-BGP to exchange information between VTEPs. The MP-BGP EVPN control plane provides protocol-based
remote VTEP discovery and MAC learning. As a result, ooding related to L2 unknown unicast trac is reduced. The distribution of host
MAC reachability information supports virtual machine mobility and scalable VXLAN overlay network designs. EVPN was introduced in RFC
7432 and is based on BGP MPLS-based VPNs.
Benets of BGP EVPN-based VXLAN
• Eliminates the ood-and-learn method of VTEP discovery by enabling control-plane learning of end-host L2 and L3 reachability
information.
• Minimizes the network ooding of unknown unicast and broadcast trac through EVPN-based MAC and IP route advertisements on
local VTEPs.
• Provides support for host MAC mobility.
VXLAN
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