USING THE INFORMATION SCREENS5-105.2.1 Network Traffic Screen DataThe Network Traffic screen displays the following:Received shows the total number of frames received by theFDMMIM at each bridge port. The totals include both data andBridge Protocol Data Unit (BPDU) frames.Filtered shows the total number of frames NOT passed from onebridge port to the other, because the frame’s destination was locatedon the same network as its source. If a bridge port is not in theForwarding state, it filters all data frames it receives at that port.A small plus sign (+) may appear just to the right of the FDDIfiltered frame number for the FDDI bridge (see Figure 5-1). This signindicates the FDMMIM software, while performing other functions,may have lost track of the total number of filtered frames. TheFDMMIM displays a continuation from the last “known” number offiltered frames. To clear the plus sign, reset the counters.Forwarded shows the total number of frames forwarded from onenetwork to the other (Ethernet to FDDI or FDDI to Ethernet).Transmitted shows the total number of SMT and BPDU framessent by the FDMMIM from each port.Ethernet/FDDI Exceptions shows the total number of framesdiscarded by the bridge for any reason. The following describesexception frames further:Rx CRC Shows the number of frames received(Ethernet only) at the Ethernet port with a badCyclical Redundancy Check (CRC)field. A frame with a bad CRC fieldusually indicates that the frame wasdamaged in transmission.Rx Errors Combines the number of frames with(FDDI only) a bad Cyclical Redundancy Check(CRC) and misaligned packetsreceived at the FDDI port.
