EtherIP tunnel - HyperV Live migration

I have a pair of LTM VE 11.4 and a pair of HyperV host which host an apache server (just one location)

 

Both LTMs are on a same switch to create an EtherIP tunnel (VLAN10) They are also connected to 2 separate switches where each of the 2 HyperV host sit.(VLAN20)

 

I created a bi-directionnal EtherIP using the dedicated VLAN10. At that point, only the LTM sitting on the same switch than the HyperV host can ping the apache.

 

I'm trying to route traffic for VLAN20 through the EtherIP tunnel to get to the other network. I created a VLAN group with both the EtherIP tunnel and the VLAN20. As soon as I do this, I lost connectivity to that VLAN.

 

What should I do ?