Personally I detest host table entries.  Having to use that points to a 
host of issues with your existing network.
From a PC on the local network do a Start, Run, Cmd.  Once at the dos 
command line type in 
ipconfig /all
Record the values you have for:
  Host Name
  Primary Dns suffix
  IPv4 Address
  DNS Servers
My PC is showing these values:
   Host Name . . . . . . . . . . . . : GDL164
   Primary Dns Suffix  . . . . . . . : dekko-1
   IPv4 Address. . . . . . . . . . . : 10.10.8.237
   DNS Servers . . . . . . . . . . . : 10.10.4.250
                                       10.10.4.252
                                       10.17.4.180
What you have in CFGTCP, 12, 
Domain name server: 
  Internet address . . . . . . .   '10.10.4.250'
  Internet address . . . . . . .   '10.10.4.252'
  Internet address . . . . . . .   '10.17.4.180'
Should match
   DNS Servers . . . . . . . . . . . : 10.10.4.250
                                       10.10.4.252
                                       10.17.4.180
You may be having dns lookup issues from your IBM i because you have a 
network administrator as sadistic as ours who changes the IP addresses of 
our DNS servers occasionally.
What you have in CFGTCP, 12,
Domain search list . . . . . . .   'dekko-1 corp.dekko.com dekko.com'
should have, as a minimum, what you have in
   Primary Dns Suffix  . . . . . . . : dekko-1
You may want to run ipconfig /all on other PC's that you are having issues 
with to see what their "Primary Dns Suffix" is and include that in Domain 
search list.
Once you have that you should be able to run these commands from your IBM 
i command line:
CALL QCMD
PING GDL164
Verifying connection to host system GDL164.dekko-1 at address
  10.10.8.237. 
Why did it initially try GDL164.dekko-1?  Was it because it was the first 
in the "Domain search list"?  Probably.  Because on CFGTCP, 12 I have
Domain name  . . . . . . . . . .   'corp.dekko.com'
so that IBM i thinks it is in the corp.dekko.com domain.
Hopefully being able to tie your IBM i's networking setup to your PC's 
network setup helps to clear up some issues.
Rob Berendt
As an Amazon Associate we earn from qualifying purchases.