08-15-2014 06:06 PM - edited 03-04-2019 11:33 PM
Hello,
I am upgrading 3945 router. Little confused to set the boot system file.
Output from show version
System image file is "flash0:c3900e-universalk9-mz.SPA.153-1.T1.bin"
Last reload type: Normal Reload
Last reload reason: power-on
R1(config)#boot system ?
WORD TFTP filename or URL
flash Boot from flash memory
flash0 Boot from flash0
flash1 Boot from flash1
ftp Boot from a server via ftp
mop Boot from a Decnet MOP server
rcp Boot from a server via rcp
rom Boot from rom
tftp Boot from a tftp server
usbflash0 Boot from usbflash0
usbflash1 Boot from usbflash1
R1#dir
Directory of flash0:/
1 -rw- 93157620 Nov 4 2013 21:03:04 -05:00 c3900e-universalk9-mz.SPA.153-1.T1.bin
2 -rw- 3064 Nov 4 2013 21:13:52 -05:00 cpconfig-39xx.cfg
3 drw- 0 Nov 4 2013 21:14:22 -05:00 ccpexp
239 -rw- 2464 Nov 4 2013 21:16:08 -05:00 home.shtml
240 -rw- 100829316 Aug 15 2014 20:32:18 -04:00 c3900e-universalk9-mz.SPA.154-2.T1.bin
Which of the below command is right to set up boot variable?
R1(config)#boot system ?
WORD TFTP filename or URL
flash Boot from flash memory
flash0 Boot from flash0
R1(config)#boot system flash0:c3900e-universalk9-mz.SPA.154-2.T1.bin
Or
R1(config)#boot system flash0 ?
WORD flash0 system image filename
R1(config)#boot system flash 0 flash0:c3900e-universalk9-mz.SPA.154-2.T1.bin
Solved! Go to Solution.
08-15-2014 06:52 PM
2900/3900 ISR G2 has two CF slots. So for the sake of accuracy, I'd go for this:
config t
boot system flash flash0:c3900e-universalk9-mz.SPA.154-2.T1.bin
end
wr
08-15-2014 06:52 PM
2900/3900 ISR G2 has two CF slots. So for the sake of accuracy, I'd go for this:
config t
boot system flash flash0:c3900e-universalk9-mz.SPA.154-2.T1.bin
end
wr
01-28-2015 02:16 PM
Thanks for taking the time to rate our posts. :)
07-07-2015 03:13 PM
This discussion has been reposted from Additional Communities to the WAN, Routing and Switching community.
05-25-2015 05:21 AM
Hi Leo,
What will be the difference If I don't use "flash" keyword before "flash0:c3900e-universalk9-mz.SPA.154-2.T1.bin "
Thanks/Regards
05-25-2015 05:25 AM
If you don't use the location, i. e. "flash0:" or "flash1:", the router will not know where to boot and might go into ROMmon.
If you don't want to use the "location" then don't put the second CF card.
01-31-2018 02:11 PM
Five easy steps on any router, 3945E or 3945.
1. Verify: show run | include boot
2. Conf t
no boot system flash:c3900nm-advsecurityk9-mz.12.4-15.T3.bin (old ios) or you can just give no boot system
boot system <flash0:c3900.........>
3. end
4. Wr mem
5. Verify to make sure if startup config has the right ios: sh start | in boot
06-01-2015 03:14 AM
Router#conf t
Router(config)#boot system flash c3900e-universalk9-mz.SPA.154-2.T1.bin
Router (config)# do wr
Router (config)#do reload
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