The present invention relates to a switch including a plurality of input ports, a plurality of output ports, at least one output port, called observation port, being connected to an observation module able to analyze the traffic of the frames passing through via the switch, and a conveying component configured to convey each frame.
The switch is configured to transmit, to the observation modules via the observation port, only frames according to a first observation condition and a second observation condition. The compliance of a frame with the first observation condition is determined as a function of an observation field and the compliance with the second observation condition is determined as a function of the identifier and/or of an input and/or output port associated with this frame.