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Community Member

Locate IP address source

Hello All,

Is there a way to locate through which port of a switch a particular ip address is coming from?

I have a situation where a pc appears to be generating substanial broadcasts and I know which switch the pc must be connected to but am not sure which port the pc is connected.

I was thinking there may be a show command that can provide this information. Thanks.

Keith

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Re: Locate IP address source

You need to know the mac address of the PC. You can go to the router on that subnet and show arp | include 10.10.10.10. That will display the mac for IP address 10.10.10.10. Now log into the switch and sh mac-address address 1212.bbbb.aeae. You will see the port the switch is using to forward frames to that mac.

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Community Member

Re: Locate IP address source

Hi,

do a show ip arp and get the MAC address of the device.in the respective switch,do a show cam and u ll get the port of the switch.

Nirmal.

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