DHCP Snooping To Track Down the Switch Port

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Yudong Wu Thu, 08/27/2009 - 21:38
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Check out the following linking regarding to ip dhcp snooping:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_see/configuration/guide/swdhcp82.html


You can use "show ip dhcp snooping binding" to check IP-MAC address binding.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_see/command/reference/cli2.html#wp5096793


In general, you can find the same info by the following steps:

1. on the gateway router, check arp table and find the mac address of related IP address.

2. then you can find the port info by looking for the mac address in mac-address table.


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