2H22-08R Overview2H22-08R SmartSwitch 2208 User’s GuidePage 1-31.3 2H22-08R OVERVIEWThe 2H22-08R is a Fast Ethernet standalone device that has six RJ45switched ports and two optional Fast Ethernet Interface Module ports(100BASE-TX, 100BASE-FX, and 100BASE-F3) that provide twistedpair, multimode, and single mode fiber optic cabling connectivity.Figure 1-1 The 2H22-08RThe 2H22-08R supports traditional IEEE 802.1d switching (bridging),IEEE 802.Q switching, and Cabletron Systems SECUREF AST SwitchingVirtual Network technology. The 2H22-08R is used to connect individualhigh-bandwidth user devices, such as workstations, and provide a centralswitching point for multiple 10/100 Mbps Fast Ethernet segments.1.3.1 Auto-NegotiationTwisted Pair ports on the 2H22-08R can auto-negotiate the type ofconnection required to provide a link to another device. DuringAuto-Negotiation, two devices automatically exchange informationconcerning their operating capabilities. The Auto-Negotiation featuretargets the maximum capabilities between the two devices. For example,the 2H22-08R adjusts to 100 Mbps when the device on the other end ofthe connection can adjust between 10 Mbps or 100 Mbps. If the device onthe other end of the connection can only operate at 10 Mbps, then the2H22-08R adjusts to 10 Mbps operation.When Auto-Negotiation is supported at both ends of a link, the twodevices dynamically adjust to full or half duplex operation based on themaximum capability that can be reached between the two devices. If thedevice connected to the 2H22-08R cannot auto-negotiate, the 2H22-08Rinterface operates according to the capabilities of the other device.7 81X 5X 6X4X3X2X21 6543PWRCPUCOMRESET2H22-08R
