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Home > Archive > alt.certification.cisco > August 2002 > 3600 not booting
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| David Lee 2002-08-27, 4:28 am |
| We have a 3600 as the main hub (well, you know what I mean!) of our
network.. We had a power outage last week, when the power came back on the
route didn't work anymore. Plugged into the console port and just got
jibberish out of it. Tried removing all the cards and plugging in one by
one but still nothing. All the kit was switched off when the power came
back on and then switched on again once the power was back on, so I doubt a
power spike could have killed it. Is there anything we might be able to do
to revive it, or has it died? What could have caused it?
cheers
dave
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| "David Lee" <dave@anystuff.f9.co.uk> wrote in message news:< 3d6b400a$0$12844$afc38c87@news
.easynet.co.uk>...
> We have a 3600 as the main hub (well, you know what I mean!) of our
> network.. We had a power outage last week, when the power came back on the
> route didn't work anymore. Plugged into the console port and just got
> jibberish out of it. Tried removing all the cards and plugging in one by
> one but still nothing. All the kit was switched off when the power came
> back on and then switched on again once the power was back on, so I doubt a
> power spike could have killed it. Is there anything we might be able to do
> to revive it, or has it died? What could have caused it?
>
> cheers
>
> dave
If you get gibberish out of the console of a router the first thing
you want to check is the console speed. Try your terminal emulator at
different speeds and see if the characters change.
When a router fails to come up after a power failure/surge one of the
other likely causes is that someone made changes to the config, but
the router has not been reloaded since then.
Also you have to define 'router not working'. Are the power and system
LEDs on?
You can't diagnose the problem till you get some sort of console
access...
Tade
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|
| "David Lee" <dave@anystuff.f9.co.uk> wrote in message news:< 3d6b400a$0$12844$afc38c87@news
.easynet.co.uk>...
> We have a 3600 as the main hub (well, you know what I mean!) of our
> network.. We had a power outage last week, when the power came back on the
> route didn't work anymore. Plugged into the console port and just got
> jibberish out of it. Tried removing all the cards and plugging in one by
> one but still nothing. All the kit was switched off when the power came
> back on and then switched on again once the power was back on, so I doubt a
> power spike could have killed it. Is there anything we might be able to do
> to revive it, or has it died? What could have caused it?
>
> cheers
>
> dave
If you get gibberish out of the console of a router the first thing
you want to check is the console speed. Try your terminal emulator at
different speeds and see if the characters change.
When a router fails to come up after a power failure/surge one of the
other likely causes is that someone made changes to the config, but
the router has not been reloaded since then.
Also you have to define 'router not working'. Are the power and system
LEDs on?
You can't diagnose the problem till you get some sort of console
access...
Tade
| |
| David Lee 2002-08-28, 2:42 am |
| > You can't diagnose the problem till you get some sort of console
> access...
I thought that might be the problem so I tried the same laptop on an other
router and it was fine. This would suggest that there is something pretty
badly wrong with the poor thing wouldn't it? As for lights, the system
light just flashes irregulary but never goes "solidly" on as it should...
| |
| David Lee 2002-08-28, 3:42 am |
| > You can't diagnose the problem till you get some sort of console
> access...
I thought that might be the problem so I tried the same laptop on an other
router and it was fine. This would suggest that there is something pretty
badly wrong with the poor thing wouldn't it? As for lights, the system
light just flashes irregulary but never goes "solidly" on as it should...
| |
| Eric LEMAITRE 2002-08-28, 5:41 am |
| Hi all !
David Lee wrote:
>>You can't diagnose the problem till you get some sort of console
>>access...
>>
>
> I thought that might be the problem so I tried the same laptop on an other
> router and it was fine. This would suggest that there is something pretty
> badly wrong with the poor thing wouldn't it? As for lights, the system
> light just flashes irregulary but never goes "solidly" on as it should...
The console garbage reminds me about an experience we made, while
attempting a forgotten password recovery procedure one of us wrote the
config-register bad, not 0x2102 (2500 or 1600 routers) but something
else (perhaps 2102), and our console output went to gabage at reboot
because this value meant in fact a serial port speed redefinition.
So perhaps your config-register is altered, you should halt it at boot
and set again proper config register, but of course you will have to
test and find a proper serial speed for console (9600, 19200, ...).
Best regards.
--
Eric LEMAITRE
CNAM Computer Engineer, MS/CS
Certified Java Programmer, Cisco Network & Design Associate, Linux
RedHat Engineer & Trainer
Java : SCJP2 (#H3CPAR00B0)
Cisco : CCNA (#CSCO10300611), CCDA (#CSCO10437862)
Linux RedHat : RHCE (#806099741300292), RHCX
| |
| Eric LEMAITRE 2002-08-28, 6:41 am |
| Hi all !
David Lee wrote:
>>You can't diagnose the problem till you get some sort of console
>>access...
>>
>
> I thought that might be the problem so I tried the same laptop on an other
> router and it was fine. This would suggest that there is something pretty
> badly wrong with the poor thing wouldn't it? As for lights, the system
> light just flashes irregulary but never goes "solidly" on as it should...
The console garbage reminds me about an experience we made, while
attempting a forgotten password recovery procedure one of us wrote the
config-register bad, not 0x2102 (2500 or 1600 routers) but something
else (perhaps 2102), and our console output went to gabage at reboot
because this value meant in fact a serial port speed redefinition.
So perhaps your config-register is altered, you should halt it at boot
and set again proper config register, but of course you will have to
test and find a proper serial speed for console (9600, 19200, ...).
Best regards.
--
Eric LEMAITRE
CNAM Computer Engineer, MS/CS
Certified Java Programmer, Cisco Network & Design Associate, Linux
RedHat Engineer & Trainer
Java : SCJP2 (#H3CPAR00B0)
Cisco : CCNA (#CSCO10300611), CCDA (#CSCO10437862)
Linux RedHat : RHCE (#806099741300292), RHCX
| |
| David Lee 2002-08-28, 10:30 am |
|
That's what it was in the end. The console port was set to 115000.
Apparently something like this has happened before and the IOS corrupted. I
suppose it was set to 115000 so that a new IOS could be loaded. That's what
I had to do. Used xmodem to upload IOS12.0 through the console cable..
Why did this happen though. It is apparently the second time that this has
happened to this router. Surely a switching off the power shouldn't have
this effect on a router? If so, how should you switch it off? I was
unaware of any shutdown procedure..
"Eric LEMAITRE" <lemaitre.eric@free.fr> wrote in message
news:3D6CAF57.5050405@free.fr...
> Hi all !
>
> David Lee wrote:
>
> >>You can't diagnose the problem till you get some sort of console
> >>access...
> >>
> >
> > I thought that might be the problem so I tried the same laptop on an
other
> > router and it was fine. This would suggest that there is something
pretty
> > badly wrong with the poor thing wouldn't it? As for lights, the system
> > light just flashes irregulary but never goes "solidly" on as it
should...
>
> The console garbage reminds me about an experience we made, while
> attempting a forgotten password recovery procedure one of us wrote the
> config-register bad, not 0x2102 (2500 or 1600 routers) but something
> else (perhaps 2102), and our console output went to gabage at reboot
> because this value meant in fact a serial port speed redefinition.
> So perhaps your config-register is altered, you should halt it at boot
> and set again proper config register, but of course you will have to
> test and find a proper serial speed for console (9600, 19200, ...).
>
> Best regards.
> --
>
> Eric LEMAITRE
> CNAM Computer Engineer, MS/CS
> Certified Java Programmer, Cisco Network & Design Associate, Linux
> RedHat Engineer & Trainer
> Java : SCJP2 (#H3CPAR00B0)
> Cisco : CCNA (#CSCO10300611), CCDA (#CSCO10437862)
> Linux RedHat : RHCE (#806099741300292), RHCX
>
| |
| David Lee 2002-08-28, 11:28 am |
|
That's what it was in the end. The console port was set to 115000.
Apparently something like this has happened before and the IOS corrupted. I
suppose it was set to 115000 so that a new IOS could be loaded. That's what
I had to do. Used xmodem to upload IOS12.0 through the console cable..
Why did this happen though. It is apparently the second time that this has
happened to this router. Surely a switching off the power shouldn't have
this effect on a router? If so, how should you switch it off? I was
unaware of any shutdown procedure..
"Eric LEMAITRE" <lemaitre.eric@free.fr> wrote in message
news:3D6CAF57.5050405@free.fr...
> Hi all !
>
> David Lee wrote:
>
> >>You can't diagnose the problem till you get some sort of console
> >>access...
> >>
> >
> > I thought that might be the problem so I tried the same laptop on an
other
> > router and it was fine. This would suggest that there is something
pretty
> > badly wrong with the poor thing wouldn't it? As for lights, the system
> > light just flashes irregulary but never goes "solidly" on as it
should...
>
> The console garbage reminds me about an experience we made, while
> attempting a forgotten password recovery procedure one of us wrote the
> config-register bad, not 0x2102 (2500 or 1600 routers) but something
> else (perhaps 2102), and our console output went to gabage at reboot
> because this value meant in fact a serial port speed redefinition.
> So perhaps your config-register is altered, you should halt it at boot
> and set again proper config register, but of course you will have to
> test and find a proper serial speed for console (9600, 19200, ...).
>
> Best regards.
> --
>
> Eric LEMAITRE
> CNAM Computer Engineer, MS/CS
> Certified Java Programmer, Cisco Network & Design Associate, Linux
> RedHat Engineer & Trainer
> Java : SCJP2 (#H3CPAR00B0)
> Cisco : CCNA (#CSCO10300611), CCDA (#CSCO10437862)
> Linux RedHat : RHCE (#806099741300292), RHCX
>
| |
| Charlie Bruce 2002-08-28, 11:28 am |
| "David Lee" <dave@anystuff.f9.co.uk> wrote in message news:< 3d6c85db$0$12846$afc38c87@news
.easynet.co.uk>...
> > You can't diagnose the problem till you get some sort of console
> > access...
>
> I thought that might be the problem so I tried the same laptop on an other
> router and it was fine. This would suggest that there is something pretty
> badly wrong with the poor thing wouldn't it? As for lights, the system
> light just flashes irregulary but never goes "solidly" on as it should...
Try setting your laptop hyperterm or whatever settings to Cisco
default 9600,8,N,1. If the con 0 was set to 115k -your laptop would be
set to that, and if the router went to rommon, it will be
trying to connect at 9600, I believe.
-charlie
| |
| Charlie Bruce 2002-08-28, 12:28 pm |
| "David Lee" <dave@anystuff.f9.co.uk> wrote in message news:< 3d6c85db$0$12846$afc38c87@news
.easynet.co.uk>...
> > You can't diagnose the problem till you get some sort of console
> > access...
>
> I thought that might be the problem so I tried the same laptop on an other
> router and it was fine. This would suggest that there is something pretty
> badly wrong with the poor thing wouldn't it? As for lights, the system
> light just flashes irregulary but never goes "solidly" on as it should...
Try setting your laptop hyperterm or whatever settings to Cisco
default 9600,8,N,1. If the con 0 was set to 115k -your laptop would be
set to that, and if the router went to rommon, it will be
trying to connect at 9600, I believe.
-charlie
| |
| george 2002-08-29, 11:28 pm |
| "David Lee" <dave@anystuff.f9.co.uk> wrote in message news:< 3d6cf23d$0$12852$afc38c87@news
.easynet.co.uk>...
> That's what it was in the end. The console port was set to 115000.
> Apparently something like this has happened before and the IOS corrupted. I
> suppose it was set to 115000 so that a new IOS could be loaded. That's what
> I had to do. Used xmodem to upload IOS12.0 through the console cable..
>
> Why did this happen though. It is apparently the second time that this has
> happened to this router. Surely a switching off the power shouldn't have
> this effect on a router? If so, how should you switch it off? I was
> unaware of any shutdown procedure..
>
> "Eric LEMAITRE" <lemaitre.eric@free.fr> wrote in message
> news:3D6CAF57.5050405@free.fr...
> > Hi all !
> >
> > David Lee wrote:
> >
> > >>You can't diagnose the problem till you get some sort of console
> > >>access...
> > >>
> > >
> > > I thought that might be the problem so I tried the same laptop on an
> other
> > > router and it was fine. This would suggest that there is something
> pretty
> > > badly wrong with the poor thing wouldn't it? As for lights, the system
> > > light just flashes irregulary but never goes "solidly" on as it
> should...
> >
> > The console garbage reminds me about an experience we made, while
> > attempting a forgotten password recovery procedure one of us wrote the
> > config-register bad, not 0x2102 (2500 or 1600 routers) but something
> > else (perhaps 2102), and our console output went to gabage at reboot
> > because this value meant in fact a serial port speed redefinition.
> > So perhaps your config-register is altered, you should halt it at boot
> > and set again proper config register, but of course you will have to
> > test and find a proper serial speed for console (9600, 19200, ...).
> >
> > Best regards.
> > --
> >
> > Eric LEMAITRE
> > CNAM Computer Engineer, MS/CS
> > Certified Java Programmer, Cisco Network & Design Associate, Linux
> > RedHat Engineer & Trainer
> > Java : SCJP2 (#H3CPAR00B0)
> > Cisco : CCNA (#CSCO10300611), CCDA (#CSCO10437862)
> > Linux RedHat : RHCE (#806099741300292), RHCX
> >
I've had a similary odd experience with 3600 (might have been a 3620
or 3640) routers that may explain this. My memory is a bit fuzzy, but
I think it went like this.
We needed to load an IOS via the console port so we used rommon to
change the speed to 11.5K. After a successful IOS load, we go back
into rommon and return the console port speed to 9600. When we
reboot, the router is still operating at 11.5K. Then we tried setting
the reg to x2102 and rebooting, but still the router is operating at
11.5K (even though a 'show ver' displays the register was indeed
x2102.) Finally, in the config file we enter:
line con 0
speed 9600
That did the trick. After that, we could remove the 'speed 9600'
command and the 9600 sticks.
Again, my memory is fuzzy on this, but the bottom line was that after
using rommon to set the router console speed to 11.5K and *thinkning*
we had then used rommon to reset it to 9600, we found, on rebooting,
that it was still at 11.5K. Sounds like that may be what happened to
you.
| |
| george 2002-08-30, 12:29 am |
| "David Lee" <dave@anystuff.f9.co.uk> wrote in message news:< 3d6cf23d$0$12852$afc38c87@news
.easynet.co.uk>...
> That's what it was in the end. The console port was set to 115000.
> Apparently something like this has happened before and the IOS corrupted. I
> suppose it was set to 115000 so that a new IOS could be loaded. That's what
> I had to do. Used xmodem to upload IOS12.0 through the console cable..
>
> Why did this happen though. It is apparently the second time that this has
> happened to this router. Surely a switching off the power shouldn't have
> this effect on a router? If so, how should you switch it off? I was
> unaware of any shutdown procedure..
>
> "Eric LEMAITRE" <lemaitre.eric@free.fr> wrote in message
> news:3D6CAF57.5050405@free.fr...
> > Hi all !
> >
> > David Lee wrote:
> >
> > >>You can't diagnose the problem till you get some sort of console
> > >>access...
> > >>
> > >
> > > I thought that might be the problem so I tried the same laptop on an
> other
> > > router and it was fine. This would suggest that there is something
> pretty
> > > badly wrong with the poor thing wouldn't it? As for lights, the system
> > > light just flashes irregulary but never goes "solidly" on as it
> should...
> >
> > The console garbage reminds me about an experience we made, while
> > attempting a forgotten password recovery procedure one of us wrote the
> > config-register bad, not 0x2102 (2500 or 1600 routers) but something
> > else (perhaps 2102), and our console output went to gabage at reboot
> > because this value meant in fact a serial port speed redefinition.
> > So perhaps your config-register is altered, you should halt it at boot
> > and set again proper config register, but of course you will have to
> > test and find a proper serial speed for console (9600, 19200, ...).
> >
> > Best regards.
> > --
> >
> > Eric LEMAITRE
> > CNAM Computer Engineer, MS/CS
> > Certified Java Programmer, Cisco Network & Design Associate, Linux
> > RedHat Engineer & Trainer
> > Java : SCJP2 (#H3CPAR00B0)
> > Cisco : CCNA (#CSCO10300611), CCDA (#CSCO10437862)
> > Linux RedHat : RHCE (#806099741300292), RHCX
> >
I've had a similary odd experience with 3600 (might have been a 3620
or 3640) routers that may explain this. My memory is a bit fuzzy, but
I think it went like this.
We needed to load an IOS via the console port so we used rommon to
change the speed to 11.5K. After a successful IOS load, we go back
into rommon and return the console port speed to 9600. When we
reboot, the router is still operating at 11.5K. Then we tried setting
the reg to x2102 and rebooting, but still the router is operating at
11.5K (even though a 'show ver' displays the register was indeed
x2102.) Finally, in the config file we enter:
line con 0
speed 9600
That did the trick. After that, we could remove the 'speed 9600'
command and the 9600 sticks.
Again, my memory is fuzzy on this, but the bottom line was that after
using rommon to set the router console speed to 11.5K and *thinkning*
we had then used rommon to reset it to 9600, we found, on rebooting,
that it was still at 11.5K. Sounds like that may be what happened to
you.
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