3550 Finding IP from Show mac-address

Unanswered Question
Jul 30th, 2008
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So I perform a show mac-address and i see the mac address of all the devices attached and the port they are attached to, is there a way to find out what the ip's of the devices and which port they are attached to?

Thanks Greatly!

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Overall Rating: 5 (2 ratings)
Collin Clark Wed, 07/30/2008 - 08:26
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Go to the device that is the gateway for the subnet and do a show arp | inc [mac address]. You could also put an IP (or DHCP) on an interface on the particular vlan (on the 3550) and do the above command.

Hope that helps.

vtra Wed, 07/30/2008 - 08:37
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Thanks, that worked. Some are come with blank responses even though the mac is there does that mean it's just an old entry?


Collin Clark Wed, 07/30/2008 - 08:50
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Ping the broadcast address and that should repopulate the table.

vtra Wed, 07/30/2008 - 10:00
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Thank you very much for your assistance, that did it!


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