image/svg+xml
ComputeNode
GRE tunnel
TenantKey=X
Set GRE Key
Ryu
OVS
OpenFlow
Deliver/drop packetsbased on GRE key
En/de-cupsel packetinto/from GRE tunnel
ComputeNode
Compute+networknode
Tenant VM
Tenant VM
Tenant VM
Tenant VM
Tenant VM
Tenant VM
OVS
OVS
TenantKey=Y
Key is used as GRE key
agent
agent
L2 isolation by GRE tunnel
L2 over L3 with GRE tunnel- Able to span over network segments (virtual l2 segment can span over multi data centers)- can coexists withconventional networktechnology