UPDATE: After lots of googling, found how to send a break to the screen command (that seems to be the issue)
Here: https://etherealmind.com/osx-serial-console-break/
You need to ctrl + a to focus on the screen command again, and then ctrl + b to send the break.
That worked.
thanks anyway! And I hope this helps anyone with Macintoshes!
Hello everyone! I recently got a Cisco 837 router, and am having some issues accessing the IOS through console port.
I am pretty sure issue is the terminal settings, but I tried several options with no results.
Hardware:
Macbook Retina 2016 with Catalina
Cisco 837 connected with USB to Serial adapter, to a USB type C dongle.
Software:
Default terminal that comes with OSCatalina. (Term set as xterm-256 color, tried with vt100, if that makes any difference, also tried setting -UO on screen command)
Problem description:
If I screen /dev/tty.usbserial-14120 9600 into the router, I get this login screen:
pgrz117 con0 is now available
Press RETURNCCCC
NAME: PGRZ117
NOTICE: This is a private network device. If you are not authorized
to connect or configure this device, disconnect at once! Actual
or attempted use, access, examination, or configuration change by
an unauthorized person will result in criminal and civil prosecution
to the full extent of the law.
User Access Verification
Password:
"cisco" does not work as the password (neither does "password" or any other obvious variant).
So I dug a little bit up in this Community (and some other parts of the intewebs) and found many options to try, however, none of them seem to work with my setup:
Attempted workarounds:
- I followed these threads in order to attempt to enter rommon mode, didn’t work: https://community.cisco.com/t5/routing/lost-password-871w/td-p/642397
https://community.cisco.com/t5/routing/asr1002-factory-reset-or-password/td-p/3786156
(I tried setting my terminal to 300 and 1200 bauds, as described on the thread, no work) - I followed this guide: https://www.cisco.com/c/en/us/td/docs/routers/access/4400/troubleshooting/guide/isr4400trbl/isr4400trbl02.html
Didn’t because I cannot bypass the password prompt. - I also attempted all the different bauds on this reference page: https://www.cisco.com/assets/sol/sb/Switches_Emulators_v2_3_5_xx/help/350_550/index.html#page/tesla_350_550_olh/autobaud.html
- I tried a low baud speed and pressing space bar for 15 seconds and over.
- I tried with regular and low baud speed and pressing Command + b , did not work.
- I tried with control + z and control + c, no interrupt.
- I also tried steps on https://community.cisco.com/t5/routing/forgot-password/td-p/4155860.
- I tried booting with 300 bauds and then reattaching with 9600 bauds.
So as you can appreciate, I’m a bit at loss here. So, my question is:
Is there anyone out there, with experience in connecting through console port with a Mac based computer? Sadly, I don’t have any other computer, and it’s the one I usually carry, so I would like to master the art of connecting to these devices with it.
If there is any other info I can provide, I would be happy to do so.
Thanks a lot in advance guys, I know your time is valuable so I’ll try to waste as little of it as I can!
