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Mostro
Guest
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 Posted: Thu Apr 27, 2006 5:50 pm Post subject: IOS Upgrade Question |
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I have a 1720 router (frane relay) remotely. I want to upgrade the IOS
using tftp, but I am wondering if it is a bad idea to do this via telnet to
a remote router that I dont have physical access to? |
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Walter Roberson
Guest
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| Posted: Thu Apr 27, 2006 5:50 pm Post subject: Re: IOS Upgrade Question |
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In article <Hj74g.17153$4L1.11878@newssvr11.news.prodigy.com>,
Mostro <ovelozpleasenospammingme@glasnospampleasefloss.com> wrote:
| Quote: | I have a 1720 router (frane relay) remotely. I want to upgrade the IOS
using tftp, but I am wondering if it is a bad idea to do this via telnet to
a remote router that I dont have physical access to?
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Provided you have enough flash, you can copy the new image into the
router without disturbing anything.
For the experiments after that, "reload in 5 minutes" will *help*,
but you'll want to find a way to boot an image other than the default
image. [I'm relatively sure there is a way, but I haven't used IOS for
a few years and am getting rusty on such details.] |
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Rainer Temme
Guest
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| Posted: Thu Apr 27, 2006 6:50 pm Post subject: Re: IOS Upgrade Question |
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Walter Roberson schrieb:
| Quote: | but you'll want to find a way to boot an image other than the default
image. [I'm relatively sure there is a way, but I haven't used IOS for
a few years and am getting rusty on such details.]
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....
conf term
boot system flash flash:c1720-your_NEW_imagename-12.4(13)T77.bin
boot system flash flash:c1720-your_OLD_imagename-12.4(13)T77.bin
exit
write mem
this way the router will attempt to boot the new image first.
if it doesn't find it in flash, or if it finds that its corrupted,
it will boot the old image.
regards ... rainer |
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Walter Roberson
Guest
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| Posted: Thu Apr 27, 2006 8:50 pm Post subject: Re: IOS Upgrade Question |
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In article <e2r1nq$25n$1@daniel-new.mch.sbs.de>,
Rainer Temme <Rainer.Temme@NoSpam.Siemens.Com> wrote:
| Quote: | Walter Roberson schrieb:
but you'll want to find a way to boot an image other than the default
image. [I'm relatively sure there is a way, but I haven't used IOS for
a few years and am getting rusty on such details.]
|
| Quote: | conf term
boot system flash flash:c1720-your_NEW_imagename-12.4(13)T77.bin
boot system flash flash:c1720-your_OLD_imagename-12.4(13)T77.bin
exit
write mem
this way the router will attempt to boot the new image first.
if it doesn't find it in flash, or if it finds that its corrupted,
it will boot the old image.
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I'm thinking of the case where the newly booted test image renders
the device up but unreachable (for whatever reason... e.g. different
defaults). If one has written the new image into memory as the first
image to try, then reboot would not fix the problem.
On the other hand, I cannot at the moment think of how to boot and
inject a "reboot in N minutes" after the boot -- if one arms the
reboot timer before booting to the test image, that boot action would
cancel the reboot timer.
Can one put a "reboot in 10 minutes" into one's startup config perhaps?
It isn't a configuration command, though... |
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