netbackup server and client communication

When using ping, telnet, etc., are you using hostname or IP address?

Have you added /etc/hosts entries to master and client, followed by refreshing of host_cache?
bpclntcmd -clear_host_cache

See: When and how to clear the NetBackup host cache
http://www.symantec.com/docs/TECH136792

Have you added master server hostname as SERVER entry in client's bp.conf?

Different vlans is not a problem.

The only NBU requirements are forward and reverse name lookup in both directions and port connectivity.
NBU 7.5 will use PBX (port 1556) in both directions.
 

Please create bpcd log folder on the client under /usr/openv/netbackup/logs

Run bptestbpcd again:
bptestbpcd -client <client-name> -debug -verbose

Please post output of command as well client's bpcd log.
Copy the log to bpcd.txt and upload as File attachment.

PS: 

You said policy creation is failing?

How exactly is policy creation failing?
What is the error message?

NBU does not check connectivity when policy is created. Unless this is snapshot policy.

Use the NBU ports when testing telnet:

1556  (PBX)
13724  (vnetd)
13782 (bpcd)

Using 'default' telnet port does not help.
NBU can only connect on these ports.

If you cannot telnet from master to any of these ports on the client, there is probably a firewall in the way.

Get network and OS teams to check routing tables - 7-8 hops seems excessive.
 

@somesh_p, Marianne has lead you a right dirction to troubleshoot this issue. I just supplement additional couple of points for your reference.

1. It's recommended to use hostname in NetBackup environment instead of IP address as NBU server/client name. From your post, it seems that you like to use IP address. is that right?

2. Use bpclntcmd with the following parameter to see the result of name resolution.

a) execute commands against nbu server and client, respectively.

bpclntcmd -ip <ip_address>

bpclntcmd -hn <host_name>

b)execute command against nbu master, you have done with this.

usr/openv/netbackup/bin# ./bpclntcmd -pn
expecting response from server nb_server
172.26.146.30 *NULL* 172.26.146.30 27539

*NULL*, indicates that you don't configure this client in any nbu polies.

The first column "172.26.146.30" in second line indicates that you don't have hostname associated with the IP address, do you? As it should print hostname associated with the IP.

More info regarding bpclntcmd, please refer to the following link:

http://www.symantec.com/docs/TECH50198

3. As Marianne said, make sure that the three ports are open.

thanks