4108GL Unmanageable

[Shuriken9731]

Hi,

We have a 4108gl at the core of our network (secondary school) and recently I noticed it become inaccesible via the web interface.

I checked out SNMP monitoring programme and the switch was showing fine and reporting port usage etc fine, it was also operating fine.

I decided to wait until the holidays to reboot it. That now done, I still cannot access the web management. I wireshark'ed it and it just looks like the switch is throwing a RST packet straight back like it doesn't want to know. I've tried SSH and telnet using Putty and get connection closed/refused. I don't know whether they were set up but still.

Failing that, I have plugged a serial cable in the console port and still get nothing. Have tried with and without hardware control, tried 9600bps and 57600bps. It just sits on a blinking cursor. Have hit enter several times to try and get it's attention, have also re-restarted the switch, no change. I didn't see anything on the COM port when it was botting, I read somewhere it should show the POST screen etc? Not sure, but I didn't get anything. Tried with HyperTerminal too.

I'm a bit lost beyond managing it via the web interface, so any help would be very welcome.

Kind regards,

Sam.

[Vince_Whirlwind]

With the console connection, make sure you are using "none" for flow control.

[Shuriken9731]

Hi Vince,

Thanks for your reply.

Sorry, I didn't write very clearly in my original post but I have tried the serial (console) connection with "none" set for flow control. I also read an eHow guide that said flow control should be set to Xon/Xoff, so I tried that as well (in some desperation!). I have also restarted and tried again, still no luck.

Any more suggestions? Thanks in advance,

Sam.

[ITSup1]

Maybe somebody did log into the switch and changed the password.

That would be the only answer I know if the Switch is not damaged.

In this case you have to reset the switch to factory default and setup against.

At this moment you maybe should use a better password...

[Shuriken9731]

Hi,

Well as I was suspecting, this is down to a stupid mistake on my part. The console connection problem was down to me using a "standard" serial cable rather than a null modem one and the original problem was due to the list of manager IPs being wrong. I don't remember changing that list but evidently I did, at least I now know that works! :/

Anyway, thank you everyone who bothered to read this and provide constructive advice. So glad I didn't have to reset the switch!

Kind regards,

Sam.