I'm having a really frustrating problem with one of our Catalyst 3650G switches.
When connecting via serial the text appears unreadable. Most of the internet searches I've completed tell me that the baud rate is incorrect on the management software (in this case, Putty) so change it back to 9600.
However, I've been using this setting all along and if I remove the console cable from the switch and plug into the PIX and open Putty using the same serial settings, it works absolutely fine. I've been through all of the baud rates with no joy.
Here's the settings I've been using in putty:
Baud rate: 9600
Data bits: 8
Stop bits: 1
Flow Control: None
I've even played around with the other settings other than baud rate but all with no joy. I've even gone to measures such as using a different laptop, different cable and different software - TeraTerm Pro and HyperTerminal. All of which haven't helped.
Unfortunately the device was reset to factory settings in the web console before connecting to the serial console so now I am unable to connect to a web GUI or telnet to do anything as both are disabled.
Here's an example of the serial output I've copied from the CLI:
J%(Plecse answer?'yes' or?'no'.tial configuzation dialog? [yes/no??
Woumd you |ike t66?d7[6d?[[?m???lm?7n??ion!dialow? [yes/no]:
- Please answer 7yes' or$'no?.
Would you lkke |o mnuer the initial ?onviguration lialog? [yes/no]:
oul?(you nike to enter tle`initial co?figuration fi?}ow? [yes/no]:
Please can anyone suggest what else it may be?
Many ahanks in advance!
The frustrating thing is that the text is almost correct, so that implies it is probably not a baud rate problem. If it was set to the wrong baud rate, you would not recognise any of the text at all.
Have you tried with a PC rather than a laptop? I remeber some discussion about the serial interfaces on laptops being out of spec because of power supply limitations. The V.24 interface voltage levels are both plus and minus. A "real" PC has both +12V and -12V available from the PSU. A laptop has only the +12V (or maybe only the +5V, I don't know.) The laptop therefore drives +5V and 0V, and hopes the other end has thresholds that detect those levels.
Also, check the common ground reference connection on the cable.