Assymetric traffic in between the sub interfaces - FTD

[titusroz03]

Hi Team,

We have an FTD which have an inside interface connect to our LAN switch, this interface is segregated through subinterfaces for DATA and AUDIOCODE vlan and both come under same security zone as seen below.

We have both policy and nat rule for the security zone,but the traffic intended to VOICE interface is hitting DATA interface but the return traffic is hitting voice interface(Assymetric behaviour). We need to check if this is causing because of a BUIG in our version.

Current version:

firepower /system # show version Version: 7.0.5-72 Startup-Vers: 7.0.5-72

When I intiate traffic from Audiocode vlan it is hitting the inside interface and I could confirm in the capture.. Any thoughts on troubleshooting this..? 

[Karsten Iwen]

When running into problems with an ancient software version, I would be better off looking for an upgrade than digging into old bugs.

But for this particular behaviour, I would also check the VLAN configuration (firewall and switches) for misconfiguration.

[balaji.bandi]

Not sure if this is a bug or not

Can you post how these are connected to the switch side and the VLAN configured? 

Where is the GW for this Voice VLAN? The screenshot does not show the Layer 3 and routing parts.