CLIENT not communicate

 not configured as a SAN CLIENT - bp.conf missing SANCLIENT=1,8:nbftclnt,1

so are you trying to configure as a SAN client?

does it ever worked...?

Please - the log snippet is not helping one bit. You need to tell us what exactly is wrong.

With your version mix, server will first attempt comms on port 1556, then fail back to 13724.

Please ensure that port 13724 is open in both directions and that forward and reverse hostname lookup is working in both directions.

Create bpcd log folder on client for further troubleshooting.

Any reason why client is on 6.5?

The reason is the compatibility of the client

Please reply to the rest of my post?

Have you created bpcd log folder on the client?

Have you confirmed forward and reverse lookup? And bi-directional comms on port 13724?

Normal Backing rather worked over the network but it appeared in the log

Probably that 7.5 has the new Master Server setting under Fibre Transport - defaults to Preferred

If you dont have any FT servers then set it to Never

This will help with any delays during restores too

yes, I created , but seemed nothing in the log , I conducted tests with telnet client to the master server is working ok

Are backups failing? With which status code?

Are you seeing any error messages when trying to connect via Host Properties?

What is the name of the log folder where you see the details in your opening post?

Please do the following and show us output:

1. confirm hostname lookup (If master server is also the only media server, please ignore reference to media server):

from master and media server(s) :
bpclntcmd -hn <client-hostname>
bpclntcmd -ip <client-IP>

from client: 
bpclntcmd -hn <master-hostname>
bpclntcmd -ip <master-IP>
bpclntcmd -hn <media-hostname>
bpclntcmd -ip <media-IP>
bpclntcmd -self
bpclntcmd -pn

2. Test port connectivity from master and media server:

Create bpcd log folder on the client under /usr/openv/netbackup/logs.
Next, run bptestbpcd on master:
bptestbpcd -client <client-hostname> -verbose -debug

Check results.
Does it connect?
If not, check client's bpcd log for errors.

Check in bpcd log if client can resolve server's IP address to Server name that appears in Client's Server list.

Do the same test from media server if you have separate media server(s).

If nothing is created in bpcd log, check port connectivity between servers and client.
Port 13724 must be open in both directions.
On Linux client, check that iptables is disabled.

Hope this helps!