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Hard Reset of 3Com 4924 (4900 Family)

Posted on 2009-05-11
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Last Modified: 2012-06-27
We have a 3Com SuperStack 3 Switch 4924 that I've been using to test VLANs. I started making a change in the web management console and it froze up. I left it for a while, and then decided to pull the power and reboot it. It's come back up, but I can't connect to the web manager or via hyperterminal.

Is there a way to do a hard reset?

Or does anyone have an idea for getting this this back up?
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Question by:spamster
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3 Comments
 
LVL 10

Assisted Solution

by:bob_the_builder
bob_the_builder earned 1000 total points
ID: 24360018
You can try Reinitialize the Switch to factory defaults using the "system control initialize" CLI
command. The Switch will have to be reconfigured to your site specific information, this includes
VLANS, IP interfaces, static routes, i.e. everything specific to your site.

Cheers,

Bob
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LVL 14

Assisted Solution

by:JohnnyCanuck
JohnnyCanuck earned 1000 total points
ID: 24360740
Never tried this but check here.

http://www.tek-tips.com/viewthread.cfm?qid=555357

Particularly this info.

1. Connect the null-modem cable, configure Hyper Terminal for windows users to the com port you have connected, normal com setting N-8-1 none and VT100, connect to switch (login should appear if not don't worry console may be disable)
2. configure and start your TFTP Server
3. on the switch push the reset button 2 seconds
4. wait 3 seconds
5. push reset button again for 1 second
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LVL 7

Accepted Solution

by:
spamster earned 0 total points
ID: 24365090
I had a serial cable connected, but could never get anything to come up on hyperterminal session.

It's working now though, it's weird... I changed the connection speed from 19200 (which is what is etched into the back of the switch) down to 4800bps and it came right up. How weird is that...
So, when I was able to log in I reset the switch to factory defaults, wiping out all of my vlan settings and in turn, making the web management console work again.

Anywho, it's working, and I'll probably see if there's a firmware upgrade now, maybe it'll fix that issue.

I'll split the points between the two of you.

Thanks for the suggestions
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