IBM BladeCenter Deployment Guide
4.8.3 alt-sysrq
One of the reasons you may be configuring SOL is for utilizing the
Enter the command:
> sysctl
This will update that value in /etc/sysctl.conf and also set the value in
/proc/sys/kernel/sysrq to 1.
4.8.3.1 SOL using a Linux client
1.First, telnet to the MM and login. Then, enter the command console
where x is the target blade number.
2.(here is the trick) Once you have an SOL connection, hit the escape sequence which is ctrl- ]. This should bump you to a telnet prompt.
3.Next, type send brk and hit enter. You'll get a new line, but no output.
4.Then hit the sysrq command key you want such as h or m or p or w.
It should look like this:
Figure 36 alt-sysrq from Linux client
4.8.3.2 alt-sysrq from a Windows Client
For a Windows client, you need to use PuTTY, or alternately, the telnet client from the cygwin package. I was not able to get this working using regular telnet application in Windows. Hyperterminal didn't work either.
1.First, telnet to the MM and login. Then, enter the command console
where x is the target blade number.
2.(here is the trick) From the PuTTY pulldown menu, click on Special Command
3.Then hit the sysrq command key you want. Start with sysrq h. Use sysrq 8 for maximum output level.
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