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How can I find out what device is connected to a particular port on an S2500 switch?

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  • 1.  How can I find out what device is connected to a particular port on an S2500 switch?

    Posted Jun 11, 2014 06:00 PM

    I am looking for a way to identify mac or IP addresses of devices on a particular switch port.



  • 2.  RE: How can I find out what device is connected to a particular port on an S2500 switch?
    Best Answer

    EMPLOYEE
    Posted Jun 11, 2014 06:01 PM
    show user-table | include 0/0/1
    show mac-address-table | include 0/0/1

    Sent from Windows Mail


  • 3.  RE: How can I find out what device is connected to a particular port on an S2500 switch?

    Posted Jun 11, 2014 10:47 PM

    After obtaining the MAC you can get the IP if the S2500 is performing routing or if it has a vlan interface in the same VLAN as the client.

     

    (controller)# show arp | inc <mac>



  • 4.  RE: How can I find out what device is connected to a particular port on an S2500 switch?

    Posted Jun 11, 2014 11:16 PM

    if the device connected to port supports LLDP or CDP, 

     

    try "show neighbour".

     

    #show neigh

    Capability codes: (R)Router, (B)Bridge, (A)Access Point, (P)Phone, (S)Station
    (r)Repeater, (O)Other
    Neighbor Devices Information
    ----------------------------
    Local Intf Chassis ID Protocol Capability Remote Intf Expiry (Secs) System Name
    ---------- ---------- -------- ---------- ----------- ------------- -----------
    GE0/0/44 6c:f3:7f:c4:0b:5c LLDP B:A 6c:f3:7f:c4:0b:5c 108 6c:f3:7f:c4:0b:5c
    GE0/0/47 00:0b:86:6a:b2:40 LLDP B:R gigabitethernet0/0/11 99 LAB-INSTANT

    Number of neighbors: 2