Deployment Guide

20 VCF on VxRail Multirack Deployment using BGP EVPN
4.3 BGP EVPN VXLAN overlay
sfo01m01vxrail01
sfo01w02vxrail01
sfo01m01vxrail03
sfo01w02vxrail03
ECMP
Leaf01A
Leaf01B
Leaf02A Leaf02B
VNI 1614
172.16.11.253
172.16.41.253
172.16.11.253
172.16.41.253
VTEP
10.222.222.1
eBGP
eBGP
Rack 1 Rack 2
VLTi
Spine01 Spine02
VM
VM
VM on VNI 1611, IP 172.16.11.x /24
VM on VNI 1641, IP 172.16.41.x /24
172.16.41.253
Anycast gateway - VNI 1611
Anycast gateway - VNI 1641
172.16.11.253
VTEP
10.222.222.2
VLTi
VRF tenant1
VNI 1641VNI 1611
VM
VM
VM
VM
Physical L3
connection
Physical L2
connection
Virtual L2
Connection
Virtual L2
Connection
BGP EVPN topology with anycast gateways and an indirect gateway
In this deployment example, four VNIs are used: 1641, 1642, and 1643, and 3939. All VNIs are configured all
on the four leaf switches. However, only VNIs 1641, 1642, and 1643 are configured with anycast gateways.
Because these VNIs have anycast gateways, VMs on those VNIs which are routing to other networks can use
the same gateway information while behind different leaf pairs. When those VMs route, their local leaf
switches will always be doing the routing. This replaces VRRP and enables VMs to migrate from one leaf pair
to another without the need to change the network configuration. It also eliminates hair pinning and improves
link utilization since routing is performed closer to the source.
Note: VNI 1611 is used in the management domain and hosts all management VMs, including vCenter,
PSCs, and the NSX-T management cluster.