Since l2gateway binds vxlan(virtual side) to vlan(physical side) segment.
We are extracting only vxlan segment from the virtual network.
Since multi segment network can have multiple segmentation id's belonging
to different network types(vlan, gre, vxlan, etc), we are extracting the
vxlan segment from it.
We are checking for multiple vxlan segments in the network since ovsdb
does not allow multiple vxlan segmentation id's to associate for same
vlan (physical side) while creating l2_gateway_connection.
For Ex: say multi segment network has two vxlan segment id's 1000 and 2000.
If we create a l2_gateway_connection for this network by providing physical
side vlan segment as 500, the bindings should be 1000:500 and 2000:500,
this is not allowed in ovsdb hardware vtep schema.
Closes-Bug:1511639
Change-Id: I5f704eaf40763686aa30320dff7a99a16b6c1772
vikas
a381726b53