Re: New AS/400 Update - TCP/IP Problems

What is the IP address of the PC?  With your AS/400 IP address
of 10.0.0.7 with a netmask of 255.255.255.255 that means your PC
has to have a network address of 10.0.0.1 through 10.0.0.6 and
10.0.0.8 through 10.0.0.254.

If you are in the same IP network and range you do not even
need the hosts address if you specify the IP address.  But, for this
to work a few things must be ensured.

1. You must be on the same "wire".  That means, no routers between
your pc and the AS/400.  Hubs are fine.
2. You must be in the same network subnet.  if your AS/400 is 10.0.0.7
with a netmask of 255.255.255.0 and your PC is 10.0.0.10 with netmask
of 255.255.255.0 that is fine, they are in the same sub-net.  But, if your
PC is something like 10.0.1.10 they are not and you will have to go though
a router.
3. You should then be able to ping the AS/400 from the PC and vice versa.
ping 10.0.0.7 on the pc and ping 10.0.0.10 on the AS/400 (if that is the IP of
your PC).

Things to try.
On AS/400:
ping 127.0.0.1

If this does not work, you need to add the loopback interface to the
TCP/IP interfaces.  This is not required to ping the PC but is required
for proper TCP/IP setup.

These are my settings for it:
CFGTCP
1. Work with TCP/IP Interfaces
1    127.0.0.1    (add it)
Line description                   LIND                  *LOOPBACK
Subnet Mask                       SUBNETMASK  '255.0.0.0'
Type of Service                  TOS                     *NORMAL
Maximum transmission unit  MTU                    576
Autostart                             AUTOSTART     *YES
and the rest leave default.

In host table entries, you should have the 127.0.0.1
with the aliases of LOOPBACK, LOCALHOST, and whatever
you want to call your machine, I call mine AS400.CONEX but
that is arbitrary.

Here you would put your PC if you wished rather than using a DNS
server.  Ad the ip address and a few aliases for it.  some aliases are
required for APPN over SNA, etc.. but you can add more.

At this point, if you can ping 127.0.0.1 that means that tcp is running
on your AS/400.  To see if you can see the world you want to ping
your PC by it's IP address.

If you can not ping any of the other machines on the same wire with
the same sub-net then it is probably a physical problem.  Is the light
on the little convert attached to the back of the AS/400 Ethernet
card?  Unplug the ethernet cable going to the cable and plug it back
in, does the light change?  I think there are 3 of them.

Good luck,

Regards,

Jim Langston


"Gallagher, Debbie (CA - Toronto)" wrote:

> Okay, so far I managed to stumble through the instructions for installing
> the AS/400 (720 running V4R3). However, I am now stuck on getting the AS/400
> and a PC to talk to one another. This is a prerequisite for installing
> Client Access on the PC. Apologies for the length of this email, but I am
> hoping that there's enough info here to tell what I've missed.
>
> I followed the instructions for the AS/400 part set up several steps ago . .
> .here are my notes:
>
> Create Line Description:
> CRTLINETH (Create Line Description - Ethernet)
> Press Enter.
> LIND               LANLINE
> RSRCNAME   CMN03
> LINESPEED   100M
> TEXT              Line for Ethernet to LAN
> Press Enter
>
> Give AS/400 an IP address:
> Network IP Address 10.0.0.7
> Line desc   LANLINE
> Subnet mask 255.255.255.0
>
> Define local domain name and host name:
> HOSTNAME AS400IBM
> DMNNAME  FORMULA1
>
> Build a local host table:
> INTNETADR  10.0.0.7
> HOSTNAME  AS400IBM
> HOSTNAME        AS400IBM.FORMULA1
>
> Start TCP/IP:
> GO TCPADM  Press Enter
> On the TCP/IP Admin menu select option 3.
> Press Enter.
> On the display that asks whether you want to vary on all TCP/IP devices,
> press Enter.
>
> Now, on the PC/Lan part, here's my notes so far:
>
> Got my user id set up on the LAN:
> dgallagher
>
> Protocol:
> Start Menu/Settings/Control Panel.
> Double click Network. Select Protocols tab.
> Verify that the protocol is TCP/IP.
>
> Hosts File Entry:
> FORMUA1 network does not use DNS (Domain Name Server), so need to create an
> entry in the Hosts file
> c:\winnt\system32\drivers\etc\Hosts
> Added line 10.0.0.7   AS400IBM.FORMULA1
>
> Make sure AS/400 part is running:
> GO TCPADM  Press Enter
> On the TCP/IP Admin menu select option 3.
> Press Enter.
> On the display that asks whether you want to vary on all TCP/IP devices,
> press Enter.
>
> Back to PC:
> Welcome CD says the next step on the PC is to Right click on the desktop,
> and select New, then select AS/400.
> However, after I select New, AS400 is not one of the available selections.
>
> Check Client Access Manual. Decide to try PING.
> On PC, tried PING 10.0.0.7
> Request timed out
> Tried PING for another server on the network, 10.0.0.3, and it worked fine.
>
> Questions:
> How does the Lan expect to know the AS/400 is there? There were no
> instructions for me to ask the Network Administrator to do anything.
> How come when I added the entry to the Hosts file, there weren't entries
> there for other servers (like the 10.0.0.3) but I had to add one for the
> AS/400?
> What do I do now? How many things have I missed doing here?
>
> Thanks so much for any assistance. . .
>
> Debbie Gallagher
> dgallagher@deloitte.ca
>
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