07-28-2020 09:03 AM
I've got 3 new switches, and i'm trying to go through setup instructions. So far, the instructions attach a laptop (where it gets a DHCP IP and then access the web GUI at 10.0.0.1 or 10.0.0.3 Isn't working at well (PC never gets the DHCP address) I've managed to get 1 of them configured using the console cable on my second switch. On the first one, I decided to just try and reset it to default, and used the command "write erase" to reset the switch. After reboot/reload, it's asking for a username/password, and none of the defaults I've tried seems to work (cisco/cisco), blank password, etc.
Anyone have any tips here on how to recover this 1 catalyst 1000 switch that is now a brick for me?
The model, if it matters, is Cisco C1000-48T-4G-L.
Thanks in advance.
Solved! Go to Solution.
07-30-2020 08:28 PM
Ok, I took a risk, and it paid off.
I found that the flash:config.text file looked like it was the startup-config.
so, I made a backup of that file, and deleted it. then booted the switch. It thankfully, ran through a initial setup config, via the console cable. So, i've successfully recovered this switch. Thanks for the tips.
07-28-2020 09:34 AM
- Try cisco / cisco
M.
07-28-2020 09:45 AM
Perhaps try password recovery as described in this document
07-28-2020 10:51 AM
Thank you Richard for the link. I reviewed all of it, but it seems like it assume you can get a prompt. I'm unable to get a console terminal prompt. With the console cable attached, after startup, it immediately just asks for Username and Password, and every 3 times, clears the console history, and goes back to asking for a Username and password. I don't have a prompt at which i can even type enable.
Do I need to try and catch it during boot to get into some kind of recovery?
07-29-2020 07:28 AM
Yes the password recovery process described in that link does involve booting the Catalyst and interrupting the boot process.
07-29-2020 02:59 PM
Richard, I did catch it at boot, but can't figure out how to set a password. The link you sent only had a single sentence for password recovery:
"By default, any end user with physical access to the switch can recover from a lost password by interrupting the boot process while the switch is powering on and then by entering a new password."
I can't figure out the "entering a new password" part.
Here's all the commands I have at the interrupted boot prompt. Any ideas?
switch: ?
? -- Present list of available commands
boot -- Load and boot an executable image
cat -- Concatenate (type) file(s)
copy -- Copy a file
delete -- Delete file(s)
dir -- List files in directories
eeprom -- eeprom dump / display / save
espi -- espi readkey
format -- Format a filesystem
help -- Present list of available commands
memcpy -- Copy from file to memory
memdump -- Dump memory
memory -- Present memory heap utilization information
mkdir -- Create dir(s)
more -- Concatenate (display) file(s)
nand -- nand utility - check bad blocks
rename -- Rename a file
reset -- Reset the system
rmdir -- Delete empty dir(s)
set -- Set or display environment variables
sleep -- Pause (sleep) for a specified number of seconds
type -- Concatenate (type) file(s)
unset -- Unset one or more environment variables
version -- Display boot loader version
switch: version
C1000 Boot Loader (C1000-HBOOT-M), Version 15.2(7r)E RELEASE SOFTWARE (fc1)
compiled Fri 06-Dec-19 17:00 by mmohisin
07-30-2020 07:55 AM
what options are available for the set command?
07-30-2020 06:58 PM
Here's the options when I run set
switch: set
--=sleep -- Pause (sleep) for a specified number of
?=
BAUD=9600
BOOT=flash:/c1000-universalk9-mz.152-7.E1/c1000-universalk9-mz.152-7.E1.bin
CLEI_CODE_NUMBER=CMM5M00ARA
DAUGHTERBOARD_ASSEMBLY_NUM=
DAUGHTERBOARD_REVISION_NUM=
DAUGHTERBOARD_SERIAL_NUM=
ENABLE_BREAK=yes
MAC_ADDR=3c:41:0e:71:de:00
MANUAL_BOOT=no
MODEL_NUM=C1000-48T-4G-L
MODEL_REVISION_NUM=A0
MOTHERBOARD_ASSEMBLY_NUM=69BBA5M10A01
MOTHERBOARD_REVISION_NUM=2
MOTHERBOARD_SERIAL_NUM=1BA2190500060
POWER_SUPPLY_PART_NUM=341-100561-01
POWER_SUPPLY_SERIAL_NUM=DCC2316A0V2
RESET_REASON=Reload command
SECOND_POWER_SUPPLY_PART_NUM=
SECOND_POWER_SUPPLY_SERIAL_NUM=
SFP_MODULE_BOARD_ASSEMBLY_PART_NUM=
SFP_MODULE_BOARD_REVISION_NUM=
SFP_MODULE_BOARD_SERIAL_NUM=
SWITCH_NUMBER=1
SWITCH_PRIORITY=1
SYSTEM_SERIAL_NUM=PSZ24111A5P
TAN_NUM=74-122916-01
TAN_REVISION_NUMBER=A0
VERSION_ID=V01
07-30-2020 08:28 PM
Ok, I took a risk, and it paid off.
I found that the flash:config.text file looked like it was the startup-config.
so, I made a backup of that file, and deleted it. then booted the switch. It thankfully, ran through a initial setup config, via the console cable. So, i've successfully recovered this switch. Thanks for the tips.
07-31-2020 08:04 AM
Thanks for the update. Glad to know that you have resolved your issue. +5 for describing for other participants how you solved it. That is very helpful.
07-28-2020 10:53 AM - edited 07-28-2020 10:55 AM
marce1000, I mentioned in my original post I tried cisco/cisco. Didn't work.
I'm using the console cable, and after the switch boots, it's just asking for username and password, over and over. I never get a prompt.
Any other default credentials it could be?
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