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Monitoring Hub Performance 2-27
Using the FRX4000, FRX6000, and SmartSwitch 1800 Hub View
sequence (like the CRC, or cyclic redundancy check) is a
value computed at both the sending and receiving ends
of the connection; if the computed values donÕt match,
the frame is assumed to have been corrupted in transit. A
value consistently greater than zero indicates line
problems.
Logical Rejects The sum of frame rejects Ñ frames which are dropped due
to congestion or some other transmission problem Ñ and
reject frames Ñ protocol frames that notify the sender that
one or more packets is missing from a sequence. The total
is expressed as a rate (rejects/second); a value
consistently greater than zero indicates line problems.
Rx Utilization % The ratio of non-ßag characters (the space between
frames) to the total number of characters received on the
selected serial port; that is, the percentage of available
bandwidth being utilized.
Tx Utilization % The ratio of non-ßag characters (the space between
frames) to the total number of characters transmitted on
the selected serial port; that is, the percentage of available
bandwidth being utilized.
LAN Card Health
The LAN Card Health Statistics window provides standard MIB II stats for the
selected LAN interface; note that the same statistics are provided for both
Ethernet and Token Ring interfaces.
To access LAN Card Health statistics:
1. In the Hub View, click on the appropriate Module Index or Module Name text
box to display the LANCard Menu (see Figure 2-3, page 2-6).
2. Drag down to Health, and release. The LAN Health Statistics window,
Figure 2-14, will appear.