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I came across this command at a Layer 2 Switch, and I don't know what it does. 

no switchport
Ip Addr 10.2.3.4 255.255.0.0
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10

This would have to be commands provided from an interface on a L3 capable switch.

The no switchport command puts the interface in L3 mode (known as "routed port") and makes it operate more like a router interface rather than a switch port. The ip address command assigns an IP address and network mask to the interface. Routed ports can be configured with a Layer 3 routing protocol.

However, restrictions apply:

  • It does not support VLAN subinterfaces.
  • It does not support Layer 2 protocols, such as DTP and STP.
  • It is supported only on switches running the IP base or IP services image.
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  • Thanks YLearn, When I saw the picture I couldn't imagine which it will be a L3
    – TMoraes
    Nov 11, 2015 at 14:53

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