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Access problem to a Cisco 3500XL

Unanswered Question
May 1st, 2006
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What will happen with a switch if another node e.g. a printer gets the same IP address at VLAN1 on the switch?

That is what happened for me. Someone accidentally give a printer the same IP address as VLAN1 on one of two switches. Nobody noted it because the printer and the switch worked well, until one day I should Telnet the switch

Then I gave the printer another IP and cleared the DHCP address pool. But I still can’t telnet or ping the switch. Otherwise the switch works fine.

Via the command “show cdp neighbour detail” on the neighbour switch, I can verify that it is the correct IP address I try to connect to, and of course I’ve Telnetted the switch before.

Why can’t I get in contact with the switch? Nothing has changed on the switch.

Is it really necessary to reboot it?


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mahmoodmkl Mon, 05/01/2006 - 05:17
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can u try this

interface vlan 1


no shut



PeterJacobsen Mon, 05/01/2006 - 12:05
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Hi Mahmood

Maybe I could, but I don't have physical acces to the switch, unless I drive 200 KM :-(

I hoped that I could do something remote ;-)


sundar.palaniappan Mon, 05/01/2006 - 12:19
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On the router/layer3 switch at the site do a 'clear arp' and try getting to it?

Pls. rate the post if it helped.



PeterJacobsen Mon, 05/08/2006 - 00:01
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Hi Sundar

Thanks for your suggestion. Unfortunately it didn’t help.

royalblues Mon, 05/08/2006 - 01:53
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ALso try clearing the Redirects

Clear ip redirects

glen.grant Mon, 05/08/2006 - 15:31
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Go to the router it is attached to then source your telnet from the directly attached interface and see if you can get to it that way , this will rule out a default gateway problem .

netops01 Thu, 05/11/2006 - 08:43
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Had a similar problem once. Got someone to power the switch off/on, all cured. Drastic but.....


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