VXLAN Journey - Part 09 - Multi-Site VXLAN Anycast Border Gateway Configuration
In this blog we will configure special leaf nodes called border-gateways and prepare our data-centers for seamless l3vni (ip-vrf) and l2vni (mac-vrf) extension across sites. Border-Gateways comes in two flavors - anycast and vpc . Anycast border-gateways are just standalone switches. vPC border-gateways are two border-gateways which are also vPC-pairs. We will configure the variant called - anycast border-gateway . Our border-gateways and Spine switches topology is given below (Leafs and Spines connections are ignored intentionally; for that see previous blogs) - 01 - Anycast Border-Gateway DCI/Fabric Topology A border-gateway connects to Spine switches in the local site - those links are called fabric-links . It also connects to remote site's border-gateways - those links are called dci-links . In Cisco NXOS both dci and fabric links must be physical interface. Both dci and fabric links are also tracked. Tracking means if a border gateway either looses all of its fabric or dci ...