Originally posted by: SystemAdmin

I am working on a pSeries eServer RS6000 m/c with AIX 5.3 installed.

I tried to connect to it through a a dump terminal (RS232). When I switched on the m/c it showed the paramenter like memory, keyboard etc.....

After that it showed "Welcome to AIX." and then it went blank. The m/c came up and i was able to telnet to it but I was not able to see anything on the terminal.

I then tried to connect it through ReflectionX software and made the following settings as metioned in the Install Guide for AIX 5.3. Following are the settings which I did.

Line Speed (baud rate)-9600
Word Length (bits per character)-8
Parity - no (none)
Number of Stop Bits-1
Interface-RS-232C
Line Control-IPRTS (I dont know what is this but I did not find anything like this in settings menu)
Screen-normal
Row and Column-24x80
Scroll-jump (I did not find this also)
Auto LF (line feed)-off (Not this as well)
Line Wrap-on (Not this also)
Forcing Insert-line (or both)
Tab-field

What could be the problem for not able to access the m/c after it boots up.

Thanks-

Anand
#AIX-Forum

Originally posted by: SystemAdmin

Hello,

Did you try to activate the serial port (tty) on AIX? After accessing AIX through telnet, use

smit tty --> Add a tty

Be shure to set it to 'enable'.

Bernhard
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Originally posted by: SystemAdmin

I am having same problems on two pSeries 55A, and one of my two 550's. Weird as sometimes it works, but mostly it does not work. Seems to function ok until the system boots, then nothing. I will also try the 'smit tty' thing and post right back here.

Thanks
Scott
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Originally posted by: SystemAdmin

When using smit tty, I get the two tty devices as "vty0" and "vty1". I changed both to "enable" for login, and still not working.

--Output on console when booting....
0513-059 The muxatmd Subsystem has been started. Subsystem PID is 385218.
Finished starting tcpip daemons.
Starting NFS services:
0513-059 The biod Subsystem has been started. Subsystem PID is 377082.
0513-059 The rpc.statd Subsystem has been started. Subsystem PID is 368850.
0513-059 The rpc.lockd Subsystem has been started. Subsystem PID is 389128.
Completed NFS services.
starting NetWorker daemons:
nsrexecd
lgtolmd
0513-059 The ctrmc Subsystem has been started. Subsystem PID is 475378.

• then nothing.. "smitty tty" shows the following (same for vty1):

TOP Entry Fields
TTY vty0
TTY type tty
TTY interface vcon
Description Asynchronous Terminal
Status Available
Location
Parent adapter vsa0
PORT number [0] +
Enable LOGIN enable +
TIME before advancing to next port setting [0] +#
TERMINAL type vt320
FLOW CONTROL to be used xon +
STTY attributes for RUN time [hupcl,cread,brkint,ic> +
#AIX-Forum

Originally posted by: pob

You are probably using a "straight through" serial cable rather than a null modem cable. Just recently I discovered that you can talk to the service processor with both a "straight through" and null cable (similar I guess to the HMC ports handling both straight & crossover LAN cables)! Once AIX comes up and takes control of the port, only the null cable will work - this is traditional RS/6000 behavior.

Try a null modem cable and it should work. I had a customer that lost 3 weeks with a similar problem. Even the initial Installation Assistant would work, but once AIX took over, a null cable was required.

Can someone officailly confirm that the services processor supports both types of serial cables, initially atleast ?
#AIX-Forum

Originally posted by: SystemAdmin

The cable I am using is a "laplink" cable. It is a NULL modem cable. The cable worked fine for the entire install of the OS, and will work initially on a cold boot of the servers. It will not work after a warm boot, or even when connecting the 2nd time after a cold boot.
#AIX-Forum

Originally posted by: SystemAdmin

Exactly the laplink cable may be the problem. Depending on the software that opens the RS232 port some hardware handshake is checked or not. So you get output in service processor mode ore even when running the standalone diagnostics, but when AIX takes control the output stops.

Unfortunately I don't have my wiring diagram from an originally supported IBM interposer any more, but you may hopefully find the correct wiring on

http://www.uni-hohenheim.de/~schaefer/afs/info-afs/1225.html

Bernhard
#AIX-Forum

Originally posted by: SystemAdmin

ppl I got hold of a NULL moden serial cable and its working perfectly for me. We just need to add the RS232 tty so that it works when AIX takes over the control of the port
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