IBM 2074 Installation And Maintenance Information page 32

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2-8
: 2074 Console Support Controller Installation and Maintenance Information
IP Address
This is the IP address of a LAN adapter in the 2074 you want to talk to.
This identifies which 2074 you want.
Port Number
This port number is from the F2, F12 screen of the Channel Adapter in the
2074. This identifies which Channel Adapter (ESCON card) you want. Use a
port number unique to your network. To assist in determining your port
number, it is suggested you refer to the port "Internet Assigned Numbers
Authority" (IANA) website to view port numbers already in use. This website
is located at http://www.iana.org/assignments/port-numbers.
LU Name
This must match the value ("password") from the line on the 2074 System
Devices Menu screen for the Channel Adapter. This identifies which line on
the 2074 System Devices Menu screen you can get. There are limits on
this. If the line on the 2074 System Devices Menu screen has an IP
address with the "password", then only a client with this IP address can get
this session. This "password" is the only way to identify which line you will
get. Each line on the 2074 System Devices Menu screen, has values which
state which LPAR, port on the ESCON director you want to talk out, and
what CU and UA that host's IOCDS has defined to an address. To be safe,
limit the "password" to eight characters.
If all three of these parameters are correct, then the next step is to determine if it is
the customer's 3270 emulator, or a LAN problem.
For session drops and things not working correctly:
Eliminate the LAN and the clients emulator:
v Try to reproduce the problem on one of the 2074's PCOM 3270 emulator
sessions using 127.0.0.1 as the target IP address. You need to start one of the
local 2074 PCOM 3270 sessions by double-clicking on one of the 'User 3270' or
'User 3271' Icons on the 2074 desktop.
– Under the Communication pull down, select Configure.
– Highlight PC/LAN, TCP/IP - Telnet3270 and select Configure.
– Select Configure Link
– Make sure the IP address is 127.0.0.1.
– Select Advanced and enter the "port number" and "LU Name" that the
customer was trying to use on the client.
– Continue to select 'OK' until you are back to the PCOM 3270 session screen.
If you can reproduce the problem with the client's emulator session by using the
local PCOM 3270 session, there may be a 2074 code problem so call the next
level of support. If you cannot reproduce the client's emulator session problem
then the problem is either with the client's emulator software or the LAN. This
service manual is not intended to diagnose problems with client emulator
software or the customer's network, but to verify the integrity of the 2074.
However, here is a test that may be possible in some situations if you wish to go
further:
v If there is a second 2074 unit on the same LAN, perform the previous steps of
defining the IP address, "port number", and "LU Name" to that 2074's PCOM
3270 emulator session. If you can reproduce the problem, then call the next level
of support. If you cannot reproduce the problem, then the problem appears to be
on the client. This last test has confirmed the LAN.