QoS for VXLAN Layer 2 and Layer 3 Gateway Interconnections

SLX-OS VXLAN Layer 2 and Layer 3 gateway interconnections can support QoS.

VXLAN Layer 3 gateways resolve the ARP for host VMs and create routes. When VM1 sends inter-subnet packets to VM3, Leaf-A sends the packet to Spine-1 over the VXLAN configuration in the following figure. First, Spine-1 decapsulates the original Layer 2 frame inside the VXLAN tunnel, and the Layer 2 frame has DMAC as the gateway MAC of Spine-1. Then, Spine-1 routes the packet to VM3, where the ARP resolution is through the VXLAN configuration.

Configuration example

The qos-ttl-mode uniform command sets the QoS type mode to uniform, which is the default. The following example configures uniform QoS support on a VXLAN gateway.

device(config)# overlay-gateway gateway_L2L3
device(config-overlay-gw-gateway_L2L3)# type layer2-extension
device(config-overlay-gw-gateway_L2L3)# ip interface loopback 1
device(config-overlay-gw-gateway_L2L3)# qos-ttl-mode uniform
device(config-overlay-gw-gateway_L2L3)# map vni auto 
device(config-overlay-gw-gateway_L2L3)# activate