Moving a disk using wrong network device

[zBrain]

I'm moving virtual disks from a FreeNAS box to local-zfs storage.

The freeNAS machine I'm migrating from is on 10.0.1.108/24 (storage network)

The machine I'm migrating to has:
vmbr0: 10.0.0.111/24 (management network)
vmbr1: (public ip + gateway)
bond0: 10.0.1.111/24 (storage network)

In my datacenter options I selected 10.0.0.114/24 for the migration network (not sure if this affects disk move?)

So I'd expect the disk move to be done via bond0 - but its going through vmbr1. I'm not even sure how that's possible...but it's happening.

Can anyone tell me how to force it to use bond0?

 

[zBrain]

I've done some more digging and this is only more confusing and frustrating.

The source disk is a LVM device on top of iSCSI. Trying from another node where enp6s0 is a 10GB link...

# iscsiadm --mode node
10.0.1.108:3260,-1 iqn.2005-10.org.freenas.ctl:data-c-iscsitarget

# ip r
default via (public ip) dev vmbr1 onlink
10.0.0.0/24 dev vmbr0 proto kernel scope link src 10.0.0.113
10.0.1.0/24 dev enp6s0 proto kernel scope link src 10.0.1.113
(public IP)/26 dev vmbr1 proto kernel scope link src xyz

Sometimes if I start moving the disk it will use vmbr0 and give me half decent speed for an hour or so, then it switches(!) to vmbr1 and the speed drops to 3MB/s.

It never uses enp6s0 though. Same thing if I try doing a backup...I've tried doing it online, offline...I really need it to use the correct network device!

Separate question: is there a way I could dump this virtual disk to a file and re-import it? I'm having a hard time picturing how. FreeNAS has it sitting on ZFS then Proxmox layered LVM on top over iSCSI.