how to find IP from switch port??

we are using 3550 and 2950 CISCO switches... i know switches work on mac address and i can see the mac table on the switch as well... is there anyway i can find out IP address of the machine attached to a particular port of the switch???

any help will be much appreciated...

thanks
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rehanahmedsAsked:
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bradleys40Commented:
i dont think you will be lucky with resolving an ip from a mac address see link
http://compnetworking.about.com/od/networkprotocolsip/f/convertipmacadd.htm
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Aaron StreetInfrastructure ManagerCommented:
show arp ??
that will show you the list of mac to ip addresses
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Aaron StreetInfrastructure ManagerCommented:
how mac-address-table
 thats the one
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Aaron StreetInfrastructure ManagerCommented:
you need to use that in conjunction with arp

mac-address table will give you mac address assigned to each port

show arp will give you mac address linked to ip address.

put them both in a excel table and match them up!!
i not sure if there is a nicer way to do it but it works ;)

Bradley is correct taht its hard to do a mac to IP resolution. there is no easy way i know to do it
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rehanahmedsAuthor Commented:
sh arp doesnt give me any of the ip which are not configured manually on switch

its only showing vlan and gateway i gave and my pc ip address but none of the ip from the pcs directly connected....

sh mac-address-table shows me mac-address and they match with ip but i have to find a way to do it for 300-350 PCs :D
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Aaron StreetInfrastructure ManagerCommented:
it should do? does on my 3550's and 2950's ???

there are tools taht will pull the information of the switch by SNMP but you will have to pay for them!

i know kewikat tools can do it
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rehanahmedsAuthor Commented:
i got it.. SNMP agent wasnt enabled on my switches... i enabled it and used a tool from manageengine.. its a really nice tool i used the trial version though :P
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Aaron StreetInfrastructure ManagerCommented:
Isn't that what i said in my last post?? pull the information of the switch using SNMP?
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