port - ip address

Unanswered Question
May 8th, 2007
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Hi Experts ,


Is there any command where i can see ip address and corresponding port in L3 switch ?


I think sh arp , show mac-address won't give port - ipaddress mapping ...



Thanks,

Satish



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bjornarsb Tue, 05/08/2007 - 04:57
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Hi,


Yes, first you must do a sh arp to get the mac, the sh mac gives you the port.


Regards,

Bjornarsb

Jon Marshall Tue, 05/08/2007 - 04:59
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Hi Satish


As far as i am aware it is a two step process to work this out. Get the mac to IP addressing and then the mac to port mapping.


It could be scripted with perl/tcl but i don't know of any one command on the switch that would do what you want.


Jon

Martin Parry Tue, 05/08/2007 - 04:59
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Hi


Ping the IP address you want fromt hat switch. Then do a show arp | include xxx.xxx.xxx.xxx (Where xxx.xxx.xxx.xxx is your IP address). This will give you the mac address. Once you have the mac, you can do a show mac-address-table | incl 1234.1234.1234 (Where 1234.1234.1234 is your mac address). This will then show you which port on the switch the mac-address was learned, and therefore you will be able to trace the IP. If the mac-address has been learned through an uplink port, repeat the show mac-address-table | incl statement, until you find the access port.


Hope this helps


Martin


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