EVPN-VXLAN can seem unnecessarily complicated until you stop looking at all the individual protocols and start following a packet through the network.
IRB, or Integrated Routing and Bridging, allows a leaf switch to provide both layer 2 bridging within a subnet and layer 3 routing between subnets. In an EVPN-VXLAN fabric, there are two primary ways we can do that known as asymmetric and symmetric IRB.
So, to understand symmetric IRB and how it compares to asymmetric IRB, let’s do a packet walk through an EVPN-VXLAN fabric.
Continue reading “Understanding Asymmetric and Symmetric IRB in EVPN-VXLAN Fabrics”
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