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How to find to which switch host is connected ?

Let's suppose we have RW (read-write) access to all network devices (without workstation). What commands, and on which device should be used, to find where exactly host is connected ?

 

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2 Replies 2

balaji.bandi
Hall of Fame
Hall of Fame

MAC is the Only unique for any Ethernet device.

 

You can issue where Layer 3 Interface or SVI configured on that switch.

 

show ip arp | in  (MAC Address) will tell you where this come from

show mac-address-table | in (mac) show you where the device is connected

 

is this make sense ?

 

BB

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Jaderson Pessoa
VIP Alumni
VIP Alumni

Hello

 

you can map firstly host's mac address and do a trace route mac to find where is connected.

 

show ip arp (get mac host's mac address)

trace route x.x.x(source mac) x.x.x (destination mac)    -  source and destination must be the same mac.

 

Regards,

Jaderson Pessoa
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