12.
Restart the switch module in I/O module bay 1 and check the status of Serial
over LAN. If it is ready, attempt to open a Serial over LAN console.
13.
Reset the blade server by powering it down, disengaging it from the
BladeCenter S chassis (opening the release handles) and installing it again
(closing the release handles).
14.
Power up the blade server and check the status of Serial over LAN. If it is
ready, attempt to open a Serial over LAN console.
15.
Contact IBM support.
SoL session will not stay up
Use this procedure to troubleshoot when the SoL session drops unexpectedly.
Problem
You can establish a Serial over LAN session, but the session drops unexpectedly.
Investigation
Perform these steps to resolve the problem:
1.
Verify that the advanced management module has a sufficient timeout value.
The default timeout value is 120 seconds for console sessions, but it can be
changed. For example, to change this value to infinity using the advanced
management module command-line interface, enter the command:
telnetcfg -T system:mm[1] -t 0
For more information about using this command, see the
Management Module
Command-Line Interface Reference Guide
.
2.
Make sure that you are not attempting to access a blade server through Serial
over LAN and attempting to boot the blade server using PXE at the same time.
Serial over LAN traffic shares blade server internal Ethernet port 1 with regular
Ethernet traffic. Traffic from a network install server running through blade
port 1 can block Serial over LAN traffic which will cause the Serial over LAN
session to become nonresponsive.
3.
Verify that the latest Ethernet driver is installed on the blade server, especially
for blade servers running a Linux operating system.
4.
Make sure that you do not type on the keyboard while the blade server is
rebooting or the operating system network drivers are loading. This can cause
the Serial over LAN session to drop.
Trouble entering commands or receiving double prompts
Use this procedure to troubleshoot problems entering command or receiving
double prompts within a Serial over LAN session.
Problem
Within a Serial over LAN session, you have trouble entering commands or you are
receiving double prompts.
Investigation
Perform these steps to resolve the problem:
1.
Check the Return key settings for the keyboard in your terminal program.
Make sure that only a line feed character is sent whenever the Return key is
pressed.
Chapter 3. Troubleshooting
69
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