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rouge dhcp servers

is there any way to block rogue dhcp servers on your network. in particular and cable modems / routers and we had a virus spoofing as a dhcp server.

2 REPLIES
Bronze

rouge dhcp servers

Take a look at Cisco's DHCP snooping technology and Dynamic ARP inspection (DAI).

HTH

Frank

Bronze

rouge dhcp servers

Hi Jack,

At smiplest, you can enable ip dhcp snooping for this to work.

if you have vlan where dhcp snopping to be enable, use ip dhcp snooping vlan vlan-id

identify your port and mark them to turst, rest other ports will be untrusted by default.

interface type mod/num

ip dhcp snooping trust.

Thanks,

Manju

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