NFS problems to backup larger VM images

[kimmoh]

Hi,
having problems to backup larger VM images (+200GB) to FreeNAS-11.3-U2 , backup software says "Error: HTTP request has been canceled".

NFS mount is thru routers which is stupid, but our backup software only uses NFS so this have to be done.

Network provider has been testing connection between these and just couple of packets lost in the way, doesn't clarify these 30sec timeouts.

Thats why im wondering maybe it is FreeNAS that is dropping connections.

This is from Linux server that try to uploadwith NFS mount:

[Tue Aug 31 19:58:13 2021] nfs: server xxx.217.63.105 OK
[Tue Aug 31 20:42:07 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 20:42:07 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 20:42:39 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 20:42:39 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 20:42:39 2021] nfs: server xxx.217.63.105 OK
[Tue Aug 31 20:42:39 2021] nfs: server xxx.217.63.105 OK
[Tue Aug 31 20:42:39 2021] nfs: server xxx.217.63.105 OK
[Tue Aug 31 20:42:39 2021] nfs: server xxx.217.63.105 OK
[Tue Aug 31 22:55:55 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 22:55:55 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 22:56:27 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 22:56:27 2021] nfs: server xxx.217.63.105 not responding, still trying
[Tue Aug 31 22:56:27 2021] nfs: server xxx.217.63.105 OK

Any help what log to look or what might be problem ?