LTM : How to find peer device using Openstack internal network?

I have defined 4 networks within openstack:

 

LTM-MGMT - internal network for management LTM-HA - internal network for Config Sync and HA pairing

 

internal-network - internal openstack network for data and VIPs provider-network - external openstack network for VIPs

 

I have two openstack VE deployed on the same tenant as the above networks. Both VEs have the same set of networks.

 

I try to find a peer device using the MGMT network and it doesn't work. It does not find the other peer. It times out. Looking at tcpdump traces, we noticed ACK packages being "lost".

 

If I use the IP from the external network (I tried the other networks and it didn't work), LTM is able to find the other peer device, but that's not what I wanted to do.

 

I am using RHEL OS Kilo.

 

Regards, Romano