Hostname dependency

When using APPC for the TSO Commands service, z/OS® Explorer is dependent upon TCP/IP having the correct hostname when it is initialized. This implies that the different TCP/IP and Resolver configuration files must be set up correctly.

You can test your TCP/IP configuration with the fekfivpt Installation Verification Program (IVP). The command should return an output like that in this sample ($ is the z/OS UNIX prompt):

$ fekfivpt

executed on CDFMVS08 -- Wed  Jul   2  13:11:54  EDT  2008
executed by uid=1(USERID) gid=0(GROUP)
RSE_CFG=/etc/zexpl
RSE_HOME=/usr/lpp/IBM/zexpl
-- /usr/lpp/IBM/zexpl/bin/FEK.init.env
-- /usr/lpp/IBM/zexpl/bin/rse.product.env
-- /etc/zexpl/rse.env
-- /usr/lpp/IBM/zexpl/bin/FEK.final.env

current address space size limit is 1902092288 (1814.0 MB)
maximum address space size limit is 2147483647 (2048.0 MB)

-------------------------------------------------------------
TCP/IP resolver configuration (z/OS UNIX search order):
-------------------------------------------------------------
Resolver Trace Initialization Complete -> 2008/07/02 13:11:54.745964

res_init Resolver values:
 Global Tcp/Ip Dataset  = None
 Default Tcp/Ip Dataset = None
 Local Tcp/Ip Dataset   = /etc/resolv.conf
 Translation Table      = Default
 UserId/JobName         = USERID
 Caller API             = LE C Sockets
 Caller Mode            = EBCDIC
 (L) DataSetPrefix = TCPIP
 (L) HostName      = CDFMVS08
 (L) TcpIpJobName  = TCPIP
 (L) DomainOrigin  = RALEIGH.IBM.COM
 (L) NameServer    = 9.42.206.2
                     9.42.206.3
 (L) NsPortAddr    = 53            (L) ResolverTimeout    = 10
 (L) ResolveVia    = UDP           (L) ResolverUdpRetries = 1
 (*) Options NDots = 1
 (*) SockNoTestStor
 (*) AlwaysWto     = NO            (L) MessageCase        = MIXED
 (*) LookUp        = DNS LOCAL
res_init Succeeded
res_init Started: 2008/07/02 13:11:54.755363
res_init Ended: 2008/07/02 13:11:54.755371
************************************************************************
MVS TCP/IP NETSTAT CS V1R9       TCPIP Name: TCPIP           13:11:54
Tcpip started at 01:28:36 on 06/23/2008 with IPv6 enabled

-------------------------------------------------------------
host IP address:
-------------------------------------------------------------
hostName=CDFMVS08
hostAddr=9.42.112.75
bindAddr=9.42.112.75
localAddr=9.42.112.75

Success, addresses match