Change of IP address - 4400

[helenc]

Hello there

Complete newbie to this! Got a 4400 switch for our network - attached a laptop and used web interface following instructions in manual to set static IP address. Reserved said IP address in my DHCP scope.

However, now I can't browse or ping the switch and can't get back in to the web interface to chance any of the settings!

Any ideas?

 

[TimRegester]

You needed to give the switch an IP address pertinent to your own network. Thus if your network IP range for instance is 10.1.1.0-10.1.1.255 with a subnet mask of 255.255.255.0 giving the switch an IP address of 192.168.1.1 will render it invisible.

So you will now need a null modem 9pin to 9 pin RS232 serial cable ( a laplink cable will do) plug into the serial port on the back of the switch using a laptop or PC and correct the IP address to something in the subnet or subnets your network uses. It needs to be a static IP address so needs to be in a range your DHCP scope reserves for such equipment as routers, servers etc.

I hope that helps.

 

[helenc]

Thank you Tim. The IP address I gave it was indeed in the usual range for servers, routers, etc., so I'm not sure why it hasn't worked.

Off to find myself a laplink cable ....

 

[helenc]

OK I have connected laptop to switch with laplink cable but I still don't see any way of "communicating" with the switch!

Help?

 

[TimRegester]

Use hyperterminal Com1 as the port, speed 19200, 8 bits 1 stop bit no parity None for flow control, this should connect you (you may have to press enter a couple of times to get a connection.

You will then be able to log in.

 

[49merc]

Sounds like you remember the IP address you gave it. If so, give your PC an address in the same subnet and connect it to any port on the switch. You should now be able to access the switch using the IP address you assigned it. Give the switch an IP address in the network you use in your lab. As soon as you do you will lose connectivity but thats OK. Change your PC's IP back to whatever you had originally assigned it in your lab. Now you should be able to reach the switch from the IP network you have set up in your lab.

Your switch isn't "lost". You just need to go to the network you mistakingly assigned it to and put it back in the network you meant to assign it to.

Hope this helps.

 

[helenc]

Thanks for the help guys.

I managed to get in via the Hyperterminal suggestion on COM1 and re-configured the box to pick up an IP address automatically then went into my DHCP scope and reserved said address!

I only have a small network with no subnets so I really don't understand why it didn't like the IP address I gave it originally (in the scope I have reserved for servers, etc) but it has worked out in the end!

H

 

[TimRegester]

Use a null modem cable and a the serial port to check the IP address is correct and in a subnet you can route to.