Hello experts,

I have a network topology like this diagram.
When start live migration moving a VM from Host A to B,
the migration process uses either 10GbE (10.0.0.1) or 1 GbE (10.0.0.2),
but the user cannot specify the source NIC by current migrate command.

To solve the problem, my rough idea is to add a source ipv4:port argument,
the migration command seems like
```
migrate -b tcp:10.0.0.1:4444 -d tcp:10.0.0.3:4444.
```

Is it an available solution? Or, is there any concern and sugesstion?
Besides the idea, is there any good way to this issue?
                                                                                                                                     
   +-----------------------------------------------------+                                                                         
   |                     10GbE switch                    |                                                                         
   +-----------------------------------------------------+                                                                         
           |            |                |                                                                                            
           |            |                |                                                                                            
           |            |                |                                                                                            
  10.0.0.1 |    10.0.0.2|        10.0.0.3|                                                                                            
   +-+----------+-+--------+-+  +--+----------+---------+                                                                         
   |  |10GbE NIC | |1GbE NIC||  |  |10GbE NIE |         |                                                                         
   |  +----------+ +--------+|  |  +----------+         |                                                                         
   |                         |  |                       |                                                                         
   |      +---------+        |  |                       |                                                                         
   |      |   VM    |        |  |                       |                                                                         
   |      +---------+        |  |                       |                                                                         
   +-------------------------+  +-----------------------+                                                                         
           Host A                         Host B                                                                                      
                                                                                                                                      
Thank you.

Regards,
Derek.