Facing connectivity issue

If you cannot ping or traceroute to or from one server, the problem is with your networking setup, not NetBackup.  You should work with your local network admins to troubleshoot this one.

Have you verified the the media server you can't access is actual running ?

Or someone add a extra NIC to the media server ?

refer below ping and traceroute status from that media server where backup complete successfully, same output i am getting from media server where backup is not completing.

[bpadm@wdcanbp03][/home/bpadm] > traceroute wdcadsp11
trying to get source for wdcadsp11
source should be 10.69.145.208
traceroute to wdcadsp11.bcbsnc.com (192.168.2.8) from 10.69.145.208 (10.69.145.208), 30 hops max
outgoing MTU = 1500
 1  10.69.144.11 (10.69.144.11)  1 ms  1 ms  0 ms
 2  * * *
 3  * * *
 4  * * *
 5  * *[bpadm@wdcanbp03][/home/bpadm] >
[bpadm@wdcanbp03][/home/bpadm] >
[bpadm@wdcanbp03][/home/bpadm] > /etc/ping wdcadsp11
PING wdcadsp11.bcbsnc.com: (192.168.2.8): 56 data bytes

----wdcadsp11.bcbsnc.com PING Statistics----
8 packets transmitted, 0 packets received, 100% packet loss
[bpadm@wdcanbp03][/home/bpadm] >

The info you just posted does not provide any information to help any of us diagnose the problem.  Multiple people above have asked questions that need to be answered. 

ping & traceroute are just basic tests, some environment blocks ICMP so you may not see it responding.

Try with "telnet <mediaserver> 1556" to see you can connect to PBX, and also check with "bptestbpcd -host <mediaserver> -debug" to see if it connects properly. 

Actually login to the affected media server may give you more clues, you can test the connection from it to the master server. Or you can restart Netbackup services there to see if it resolves.