HP J4868A User Manual - Page 12

Introducing the HP Procurve Switch 2124 Introducing the HP Procurve Switch 2124 Features Features The features of the Switch 2124 include: I 24 auto-sensing 10/100Base-TX RJ-45 ports with "HP Auto-MDIX" I a slot for installing an HP 100-FX SC Transceiver (HP J4853A) I plug-and-play networking - all ports are enabled - just connect the network cables to active network devices and your switched network is operational I "HP Auto-MDIX" on all 10/100 twisted-pair ports, meaning that all connections can be made using straight-through twisted-pair cables. Cross-over cables are not required, although they will also work. The pin operation of each port is automatically adjusted for the attached device: if the switch detects that another switch or hub is connected to the port, it configures the port as MDI; if the switch detects that an endnode device is connected to the port, it configures the port as MDI-X. I automatic learning of the hardware addresses in the switch's 4000-entry address forwarding table I automatically negotiated full-duplex operation for the fixed 10/100 RJ-45 ports when connected to other auto-negotiating devices - the transceiver port always operates at full duplex. I auto-negotiation of flow control for ports operating at full duplex Switch Operation Overview Address Table Operation Address Learning. As devices are connected to the switch ports, either directly or through hubs or other switches that are connected to the switch, the MAC addresses of those devices are learned automatically and stored in the Switch 2124's 4000-entry address table. The switch also identifies the number of the port on which each address is learned so it knows the relative network location of each device. 1-6