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Cisco Bug: CSCvt02599 - Add support for additional Local Subnets for SNAT

Last Modified

May 16, 2020

Products (1)

  • Cisco Application Policy Infrastructure Controller (APIC)

Known Affected Releases


Description (partial)

Cisco ACI CNI is enabling SNAT for subnets that are "local" to the cluster VRF table. A local subnet is defined as a subnet in the same VRF table as the Kubernetes cluster.

Cisco ACI CNI gets the list of "local" subnets from the directly attached leaf switches.

Since Cisco ACI deploys subnets on-demand, it is possible to be in a situation where the subnet is local, but is not deployed on the leaf switches where the K8S nodes are connected and Cisco ACI CNI will not install a "DO NOT" SNAT rule for the subnet.
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