SWSW ("Software Switch") is a highly configurable Ethernet switch running in user space. The switch supports several recent Ethernet amendments such as Provider Bridges (802.1AD) and Provider Backbone Bridges (802.1AH).
It is perfect when you need to have an extendible and controllable switch, for example when there is a need to control a switch from a control plane. It can also be extended to support new and experimental protocol, including protocols above Ethernet. (Some IP support already exists).
These details are provided for information only. No information here is legal advice and should not be used as such.