Finding What Switch Port An IP Address Is On With Multiple Switches

1. Issue  “Show ARP | include a.b.c.d” on the Switch or Router for the subnet of the IP address you are trying to find

2. Issue a “Show Mac Address-table address mac address”

3. Issue a “Show CDP Neighbor” and “Show CDP Neighbor Detail” to find which switch the mac address in located on.

4. Repeat “Show mac address-table address “mac address” on switch until you find the port the IP address in on.

Tracking down an IP address to the physical port on a Cisco switch.

1. From the switch ping the IP address
2. Issue a “Show Arp”
3. Make notice of the MAC address from the ARP table
4. Issue a “Show Mac address-table | include mac address“