add k-vswitch to networking plugin docs (#16695)

Signed-off-by: Andrew Sy Kim <[email protected]>

content/en/docs/concepts/cluster-administration/networking.md

@@ -217,6 +217,10 @@ traffic to the internet.
 
 [Jaguar](https://gitlab.com/sdnlab/jaguar) is an open source solution for Kubernetes's network based on OpenDaylight. Jaguar provides overlay network using vxlan and Jaguar CNIPlugin provides one IP address per pod.
 
+### k-vswitch
+
+[k-vswitch](https://github.com/k-vswitch/k-vswitch) is a simple Kubernetes networking plugin based on [Open vSwitch](https://www.openvswitch.org/). It leverages existing functionality in Open vSwitch to provide a robust networking plugin that is easy-to-operate, performant and secure.
+
 ### Knitter
 
 [Knitter](https://github.com/ZTE/Knitter/) is a network solution which supports multiple networking in Kubernetes. It provides the ability of tenant management and network management. Knitter includes a set of end-to-end NFV container networking solutions besides multiple network planes, such as keeping IP address for applications, IP address migration, etc.