Hi Magnus, in this setup it's in an isolated lab, so Mgmt is on the same subnet as the MAGG, and Breaking Point connected to the data interfaces.
In the lab prod gw, the Mgmt MAGG does have a VIP (think like Maestro Mgmt), and I didnt want to change the MDS (as it's used for other things), so I added a different IP/subnet to the Mgmt IP on the new EXL hardware migrating to it.
The GW object was changed to use the EXL MAGG "VIP" (IP) as the object IP - of course updated interfaces/vlans/bonds too, and I am just routing through the EXL group on one VLAN, to get to the MAGG interface on the other side and back again. Alternatively I could have used a VRF/SVI, but seems OK so far.
I was able to swap over to EXL fine, and added an additional member too.
Tom