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07-22-2020

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G8316 Boot Issues

2020-07-22, 19:11 PM

In one of our labs I have a G8316 switch, that upon each boot ends up "Dropping into shell."  I can exit the shell, and it boots fine.  Its been upgraded to the latest 7.9.27.0 images, but the issue still persists. Can anything be done to prevent this?

 

Thanks!

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104 Posts

06-03-2020

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Re:G8316 Boot Issues

2020-07-23, 4:20 AM

Hello,

 

Can you tell us more about what the environment the switch is dropping in to looks like (i.e. what is the user prompt, is there any message when it goes into the shell saying what it is, and what commands  does "?" return) and how you get out of it to get it to boot up? Perhaps a screen shot of what the shell looks like? 

 

ENOS has several different lower level areas and if we knew which one it was falling in to, we should be able to figure out how to get it to boot up properly.

 

Thanks, Matt 

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Re:G8316 Boot Issues

2020-07-23, 16:31 PM

Sure! Thanks... please see attached screenshots.

 

The attached file shows the Power On serial output up until it drops into the shell.

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Re:G8316 Boot Issues

2020-07-23, 16:32 PM

This attached file shows an 'ls' of the shell.

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Re:G8316 Boot Issues

2020-07-23, 16:32 PM

And this attached file shows the "exit" dropping out of shell and the subsequent normal boot.

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Re:G8316 Boot Issues

2020-07-23, 21:37 PM

Hello,

 

Can not say I've ever seen that  ( I' have seen the underlying Linux prompt, just not a switch that drops in to it during boot up). I suspect there is a boot level variable set causing this. Has it always done it since you acquired it? Or was it working fine and one day just started dropping to the shell on boot? I will see if I can get access to a similar switch and find a boot variable that we can change to get it to auto boot into the NOS. May take a day or 2 before I get back.

 

Thanks, Matt

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Re:G8316 Boot Issues

2020-07-24, 15:26 PM

Thanks Matt!

 

I took over for an engineer who likely modified something on it... I doubt it was always like that.

 

I am certainly appreciative for anything you are able to dig up, I'll check back in a few.

 

Thanks so much.

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Re:G8316 Boot Issues

2020-07-24, 15:30 PM

No worries. I sent you a private message via this forum requesting some low level information out of the switch console. Let me know if you are comfortable with pulling that information. If not, let me know that too and I can see if we can escalate this back into Lenovo support channels.

 

Thanks, Matt

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Re:G8316 Boot Issues

2020-07-31, 12:46 PM

To wrap this thread up, the switch dropping into the # shell during boot was the result of a low level boot variable that was set.  Clearing this variable via the serial console allowed the switch to boot up into the main network operating system normally.

 

Thanks, Matt

 

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