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How can I prevent the Cisco Catalysts 2950/2960/3550/3750 from being vulnerable to ARP Poisoning?

Can this be avoided with the ARP INSPECTION?


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up vote 2 down vote accepted

Well in general on Cisco kit you'd use any or all of "DHCP Snooping", "Dynamic ARP Inspection (DAI)" or just plain port-security. Now I just need to lookup which of these are supported by your kit - back in a minute.

EDIT - Just checked all switches support all three features but you'll want to be on 12.1(22) at least.

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Thank you very much! – Andre Nov 21 '10 at 10:28

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