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Avoiding IP conflict ...

[1] I would like to know how can I proactively avoid IP conflicts in a network. This is becuase there was a customer that set a static IP that was actully a gateway IP and the whole IP subnet became unstable as the clients did not sent the route to the actual gateway.

[2] Would the router be able to detect that a new host is using an IP that is

already in use by inspecting the arp table first ?

Please advice,

- SN -

1 REPLY
Blue

Re: Avoiding IP conflict ...

You can use Dynamic ARP inspection if it is supported on your switches (3550/3560/3750/4500/6500). There is a table of valid IP to MAC mapping and all ARP responses are inspected.

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_guide_chapter09186a00805a64f2.html#wp1041210

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