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IBM pSeries 9111-520: remote connect to console via dialup

Posted on 2011-09-27
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Last Modified: 2012-05-12
Trying to connect remotely to this server to perform an AIX upgrade.   On other pSeries that we support, we've connected by dialup modem to the console port (these are old systems).   We've been unable to connect to this server, and the owner of the box was told by IBM field tech that they needed to add an async PCI card to the server, and connect the modem to that.

We have a record that dialup was tested on this server when it was installed, but that was 6 years ago, and who knows if it was actually tested.    I have no problem with telling the customer to purchase the card, but since we haven't needed it with other pSeries servers, I'm wondering what's different here.

Any insights would be much appreciated.  Thanks!

Lynne
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Question by:L_Malchiodi
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6 Comments
 
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Expert Comment

by:carlmd
ID: 36715762
This system has two native (S1, S2) serial ports. If you list all tty devices you should see them,.

The serial ports S1 and S2, at the rear of the system, are only available
if the system is not managed using a Hardware Management Console (HMC). In
this case, the S1 and S2 ports support the attachment of serial console and
modem.

If an HMC is connected, a virtual serial console is provided by the
HMC (logical device vsa0 under AIX) and also a modem can be connected to
the HMC. The S1 and S2 ports are not usable in this case.

On these tty baud rate is set to 19200. Changing baud rate using smitty
has no effect. Baud rate should be changed using Advanced System Management
Interface (ASMI).

This ports can be used to connect modem but only for dialin and dialout
no program transfer using uucp. Since flow control can't be set to RTS/CTS
binary programs can't be uucpied, data should be uuencoded before transfer.

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Author Comment

by:L_Malchiodi
ID: 36717446
I just double checked with the server owner, there's no HMC on this system.  So, you're saying that we should have access to the console port by modem in this case?
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LVL 20

Expert Comment

by:carlmd
ID: 36717623
Yes, if the modem is cabled to either S1 or S2, and the port is configured properly. Note the default baud rate is 19,200.
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LVL 20

Expert Comment

by:carlmd
ID: 37170462
Any plans to award points and close this?
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Accepted Solution

by:
L_Malchiodi earned 0 total points
ID: 37238258
Just posting a resolution....IBM was insistent that the async card was required, and the customer chose to purchase and install the card.  We were then able to get the dialup connection via console to work.

I'm still not convinced that that was the cause of the problem, but in the end, the customer made the call to proceed.  Thanks for the assistance.
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Author Closing Comment

by:L_Malchiodi
ID: 37265918
Customer decided to pursue a hardware solution to the problems, no opportunity to further troubleshoot this.
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