Separate Backup and Management traffic

[SRMETAS]

Hi, i need to move our physical veeam b&r server into a backup network zone (BKP-VLAN) . i have added an additional vmkernel adapter with vSphere Backup NFC enabled. The management vmkernel adapter and vcenter nic are in the management network zone (MGMT-VLAN).
Now my issue, as long the veeam server is mutihomed in management and backup vlan, eveything works fine.

But when i disconnect the management network from the veeam server im not able to backup any vm. I backup with nbd and not hotadd.
Our CISO does not want to have the veeam server multihomed. I think it should work but it does not.

I have open cases at vmware and veeam. I was able to have a zoom session with vmware support tho show them everything so they 100% understood the issue. Now VMware needs to talk to veeam but only when im in the call as well. Unfortunately veeam is no help at all.

So i thought maybe here is somebody who can help me.
regards
Simon

[tyler.jurgens]

Is the vCenter/Hosts/etc added to your Veeam Backup & Replication server via the BKP-VLAN instead of the MGMT-VLAN? Can the Veeam server reach all those IPs? Is your entire Veeam infrastructure on the BKP-VLAN?

[SRMETAS]

VEEAM can reach all ip's and vice versa. At the moment we have catch all firewall rules in place so we don't block anything

[SRMETAS]

Its obvious that veeam has absolutely no interest in solving this problem. Unfortunately as a very long time customer i must admit that the veeam support once was outstanding but now its just a waste of time.