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Community Member

Stop broadband routers from giving out addresses

At our University, we have a problem with students "accidentally" plugging in broadband wireless routers into our network backwards. When they do this they start giving out 192.168 addresses to other stations on the network.

What command can I put into Cisco 3548, 3550 and 3560 SMI switches to limit what DHCP server a station can see?

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Community Member

Re: Stop broadband routers from giving out addresses

You'll need to enable dhcp snooping on your network, and only trust your valid dhcp server's.

This shouldn't be a difficult problem to eliminate.

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00801e85cd.html

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