The following steps represent the fundamental configuration to use EVPN as the control plane for VXLAN. These steps are in addition to configuring VXLAN interfaces, attaching them to a bridge, and mapping VLANs to VNIs.
- Configure Physical interfaces and assign VLANs to interfaces.
- Configure L3 interfaces and assign IP addresses to interfaces.
- Configure VXLAN VNIs and enable VXLAN VNI mapping to VLAN IDs.
- Enable EVPN route exchange (that is, address-family layer 2 VPN/EVPN) between BGP peers.
- Enable EVPN on the system to advertise VNIs and host reachability information (MAC addresses learned on associated VLANs) to BGP peers.
- Disable MAC learning on VXLAN interfaces as EVPN is responsible for installing remote MACs.
Additional configuration is necessary to enable ARP/ND suppression, provision inter-subnet routing, and so on. The configuration depends on the deployment scenario. You can also configure various other BGP parameters depending on your network requirements.
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To check the BGP EVPN routes on Router 2, we will run the command run show bgp evpn route on Router 2 as shown below. In our sample configuration we haven't manually configured route target (RD), so the RDs we see in the command output below are automatically configured by the system.
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admin@router2# run show bgp evpn route
BGP table version is 5, local router ID is 134.134.134.134
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
EVPN type-1 prefix: [1]:[ESI]:[EthTag]:[IPlen]:[VTEP-IP]
EVPN type-2 prefix: [2]:[EthTag]:[MAClen]:[MAC]:[IPlen]:[IP]
EVPN type-3 prefix: [3]:[EthTag]:[IPlen]:[OrigIP]
EVPN type-4 prefix: [4]:[ESI]:[IPlen]:[OrigIP]
EVPN type-5 prefix: [5]:[EthTag]:[IPlen]:[IP]
Network Next Hop Metric LocPrf Weight Path
Extended Community
Route Distinguisher: 134.134.134.134:2
*> [5]:[0]:[24]:[33.1.1.0]
134.134.134.134 0 32768 i
ET:8 RT:134:9999 Rmac:04:f8:f8:20:6c:7b
Route Distinguisher: 134.134.134.134:3
*> [3]:[0]:[32]:[134.134.134.134]
134.134.134.134 32768 i
ET:8 RT:134:22221
Route Distinguisher: 134.134.134.134:4
*> [3]:[0]:[32]:[134.134.134.134]
134.134.134.134 32768 i
ET:8 RT:134:22222
Route Distinguisher: 134.134.134.134:5
*> [3]:[0]:[32]:[134.134.134.134]
134.134.134.134 32768 i
ET:8 RT:134:33333
Route Distinguisher: 201.201.201.201:2
*> [5]:[0]:[24]:[22.1.1.0]
201.201.201.201 0 0 201 i
RT:201:9999 ET:8 Rmac:c4:39:3a:fb:be:d9
Route Distinguisher: 201.201.201.201:3
*> [3]:[0]:[32]:[201.201.201.201]
201.201.201.201 0 201 i
RT:201:22221 ET:8
Route Distinguisher: 201.201.201.201:4
*> [3]:[0]:[32]:[201.201.201.201]
201.201.201.201 0 201 i
RT:201:22222 ET:8
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