Cabletron Systems SEHI-22/24 User Manual

Also see for SPECTRUM: User guide User guide User guide User guide User guide

Contents

Using the SEHI Hub View2-16Monitoring Hub PerformanceTo view device statistics at the Device, Module, or Port levels:1. Display the Device, Module, or Port menu by clicking mouse button 3 in theappropriate area (refer to Figure 2-5, page 2-7).2. Drag down to Statistics and then right to either General/Errors orProtocols/Frames and release.The Hub View begins counting the selected statistics when you open the window;counts will be cumulative until you use the Reset button or close the window.Note that the module statistics windows include the module number in thewindow title; the port statistics windows include the module and port numbers inthe window title.General/Error StatisticsThe General/Errors statistics windows display the following fields:Received BytesThe number of bytes of data received by this device, module, or port since thewindow was last opened or reset.Total PacketsThe number of packets of all types received by this device, module, or port sincethe window was last opened or reset.Avg Packet SizeThe number of bytes per packet received by this device, module, or port since thewindow was last opened or reset. The average packet size is calculated bydividing the number of bytes received by the number of packets received.Broadcast PacketsThe number of broadcast packets received by this device, module, or port sincethe window was last opened or reset. Broadcast packets have a single addressrecognized by each station on the net: this address is designated in IP form as255.255.255.255, or in MAC hexadecimal form as FF-FF-FF-FF-FF-FF. The ARPand RARP requests sent by bridges and routers are broadcast packets.NOTEWhen a device is reset, statistics windows and/or statistics displays in the Hub View maydisplay very large numbers for one polling interval. This is due to the resetting of thecounters.Because the SEHI does not currently support Protocol counts, the Protocol fields in theProtocols/Frames window will remain blank.