Cabletron Systems 9000 User Manual

Also see for SmartSwitch 9000: Reference guide Appendix Appendix Appendix User guide

Cabletron Systems 9000 User Manual Manual pdf 27 page image

3-3OperationDC/DC ConverterThe DC/DC converter converts the 48 VDC on the system power bus to thenecessary operating voltages for its host network services module. The diagnosticcontroller monitors and controls the operation of the DC/DC converter.INB InterfaceEach module attaches to both INB A and INB B and has two INB NetworkInterface Block’s (NIB). The INB NIBs convert canonical frames to fixed lengthdata blocks for transmission onto the INBs. For data blocks received from eitherINB, the INB NIB reassembles the data blocks received from the INB back intocanonical frames for transmission back through the switching fabric to the frontpanel ports.SecureFast SmartSwitch ArchitectureThe SecureFast SmartSwitch Architecture of the 9G421-02/9G429-02 module isconfigurable for one of two modes of operation: traditional switching (bridging),or SecureFast switching. The module supports only one of these modes ofoperation at any one time.When operating in traditional switch mode, the 9G421-02/9G429-02 makesfiltering/forwarding decisions based on Destination Address (DA), with standardIEEE 802.1D learning. Spanning tree operation for the 9G421-02/9G429-02 isconfigurable to adhere to IEEE 802.1D, DEC, or none. The default Spanning TreeAlgorithm is 802.1D.When operating in SecureFast switching mode, all filtering/forwarding decisionsare made on a DA-SA pair and its receive port. SecureFast switching modeprovides value-added network services including Topology, Connectivity, IPMulticast, Control, Security, Application, Address Management, DynamicMapping, and Directory services. For example, Topology Services includedconfigurable options ranging from simple spanning tree implementations tofully-meshed active topologies. Other services and features supported inSecureFast switching mode are described in detail in the Cabletron White Paper,IP Host Communication in Bridged, Routed and SecureFast Networks.