Stratosphere SSP is an SDN solution which creates virtual L2
networks backed by vxlan and vlan. SSP will ask hypervisor to set a
specific vlan, then SSP will interact with openflow switches and
put vxlan/vlan translation flow rules.
This plugin provides SSP as "connctivity" service provider.
Signed-off-by: Hiroaki KAWAI <kawai@stratosphere.co.jp>