From: Paul Coray (paul.coray@unibas.ch)
Date: Mon Apr 28 2003 - 12:09:14 EDT
A huge thanks to everybody who responded so quickly.
In summary, the problem is resolved by changing or disabling the
keyboard/serial break sequence. This can be done in two ways:
- Using kbd(1)(non-persistent):
# kbd -a alternate
(changes break sequence to ~^b, that is, a tilde (~) followed by a
control-B), or
# kbd -a disable
(disables keyboard and serial abort).
- Editing /etc/default/kbd: Uncomment KEYBOARD_ABORT=disable or
KEYBOARD_ABORT=alternate (effects same as above, but persistent). For
immediate effect, do
# kbd -i
Alternatively, you can use Martin Schmitt's nobreak package, available
at http://www.scsy.de/~mas/nobreak/
Rgds
Paul
> Sunmanagers,
>
> I have two SunFire V120, which operate side by side in a headless mode.
> As I have no terminal concentrator, but I still need to have access to
> the console of both servers, I planned to connect to each one's console,
> doing a 'tip hardwire' on the other host, which would connect to the
> console on serial a. This way I could even 'wake up' a host, sending a
> 'poweron' to the LOM CLI.
>
> ----------------- ------------------
> | | | |
> | serial a/lom --------- serial b |
> | BOX A | | BOX B |
> | serial b --------- serial a/lom |
> | | | |
> ----------------- ------------------
>
> This seemed to work pretty well, but there is a big drawback: Each time
> I (re)boot a host, e.g. sending an init 6 from box a to box b, the one I
> use for terminal access (box a) freezes into ok-prompt. So I have to
> wait for box b to be online, log in, connect to console of box a and
> just type 'go' at the ok...
>
> This only happens, when both serial lines are connected as above. I
> don't know if other systems would behave the same, as this is the first
> time I did this kind of serial connect configuration.
>
> Obviously the host to boot sends a break signal to the connecting host,
> causing the freeze.
> Has anybody found out how to prevent this kind of behaviour?
>
> The two boxes have prettty much identical setup:
>
> # uname -a
> SunOS ub-files 5.9 Generic_112233-04 sun4u sparc SUNW,UltraAX-i2
>
> # prtconf -V
> OBP 4.0.14 2002/07/03 09:17
>
> # grep hardwire /etc/remote
> hardwire:\
> :dv=/dev/term/b:br#9600:el=^C^S^Q^U^D:ie=%$:oe=^D:
>
> # eeprom
> ttyb-rts-dtr-off=false
> ttyb-ignore-cd=true
> ttya-rts-dtr-off=false
> ttya-ignore-cd=true
> ttyb-mode=9600,8,n,1,-
> ttya-mode=9600,8,n,1,-
> output-device=ttya
> input-device=ttya
>
> I need to get this configuration to production soon. Please help! Send
> email and I will summarize to the list.
>
> Thanks for assistance.
>
>
-- Mit freundlichen Gruessen Paul Coray Administrator Server und Netzwerk Oeffentliche Bibliothek der Universitaet Basel EDV-Abteilung Schoenbeinstrasse 18-20 CH-4056 Basel Tel: +41 61 267 05 13 Fax: +41 61 267 31 03 mailto:paul.coray@unibas.ch http://www.ub.unibas.ch _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagers
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