Cabletron Systems SEHI-22/24 - Manual (Page 30)

Using the SEHI Hub View
2-16 Monitoring Hub Performance
To view device statistics at the Device, Module, or Port levels:
1. Display the Device, Module, or Port menu by clicking mouse button 3 in the
appropriate area (refer to
Figure 2-5 , page 2-7 ).
2. Drag down to Statistics and then right to either General/Errors or
Protocols/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 the
window title; the port statistics windows include the module and port numbers in
the window title.
General/Error Statistics
The General/Errors statistics windows display the following fields:
Received Bytes
The number of bytes of data received by this device, module, or port since the
window was last opened or reset.
Total Packets
The number of packets of all types received by this device, module, or port since
the window was last opened or reset.
Avg Packet Size
The number of bytes per packet received by this device, module, or port since the
window was last opened or reset. The average packet size is calculated by
dividing the number of bytes received by the number of packets received.
Broadcast Packets
The number of broadcast packets received by this device, module, or port since
the window was last opened or reset. Broadcast packets have a single address
recognized by each station on the net: this address is designated in IP form as
255.255.255.255, or in MAC hexadecimal form as FF-FF-FF-FF-FF-FF. The ARP
and RARP requests sent by bridges and routers are broadcast packets.
NOTE
When a device is reset, statistics windows and/or statistics displays in the Hub View may
display very large numbers for one polling interval. This is due to the resetting of the
counters.
Because the SEHI does not currently support Protocol counts, the Protocol fields in the
Protocols/Frames window will remain blank.