bigip v12 VE: Swapping ethernet interfaces at boot

Dear magicians, here's another mystery:

 

 

I've got a HA cluster running 12.1.3 in production. The interfaces are as they should be:

 

eth0: Management

 

1.1: external, running on eth1

 

1.2: internal, running on eth2

 

1.3: HA-Sync, running on eth3

 

 

I took a copy into my lab, basically following https://devcentral.f5.com/questions/how-to-copy-existing-vip-config-to-other-f5-device-in-command-line .

 

 

Now, this didn't work out, I was unable to get any connections besides of the management interface, and even this was unstable while taking the other interfaces to different VLANs.

 

 

Eventually, I saw these lines while booting up the lab VE:

 

iptables: Applying firewwall rules: [ OK ]

 

Swapping ethernet interfaces: Swapping eth3 and eth0

 

Swapping eth3 and eth1

 

Swapping eth3 and eth2

 

[ OK ]

 

Bringing up loopback interface: [ OK]

 

 

 

Has anyone a clue why this swapping happens and how to disable it? Everything would be fine without.. ;) No input found so far, neither for bigip nor for centos.

 

Thanks in advance, HP.