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VXLAN Journey - Part 09 - Multi-Site VXLAN Anycast Border Gateway Configuration

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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 ...
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VXLAN Journey - Part 08 - Single Site VXLAN With Spine And Leaf Switches (Dc-02)

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In this blog we will build another data center using vxlan which we will call Dc-02. This data center will use settings/configuration exactly same as our previous blog - part -07 . We need another Dc, because soon we will integrate/connect both data-centers using vxlan's multisite connectivity for seamless l3vni/l2vni handoff. Our topology looks like below for Dc-02 -  01 - Network Topology We have 2 spine switches as ibgp route-reflectors for l2vpn-evpn address family and 2 leaf switches. Bum traffic will use BGP's ingress replication (HER). Our addressing look like below -  BGP ASN - 4200000002 Loopback 0 - 10.82.0.X/32 where X is the switch number. Loopback 1 - 10.82.1.X/32 where X is the switch number. L3VNI - Vrf_Blue ( vlan 100 with l3vni 100000 ). L2VNI - vlan 101 with l2vni 100001, 10.91.101.0/24 in Vrf_Blue. L2VNI - vlan 103 with l2vni 100003, 10.91.103.0/24 in Vrf_Blue. Spine Switch Configuration Dc-02-Spine-01 Configuration hostname Dc-02-Spine-01 nv overlay evp...
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