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Monitoring Hub Performance 2-9
Using the SEHI Hub View
For error type descriptions, see Checking Statistics, page 2-15.
Frame Sizes
Displays a percentage for each active port that represents what portion of that
port’s traffic is of a specific size, measured in bytes. You can display any one of the
following frame sizes:
• Runts (packets with fewer than 64 bytes)
• 64-127
• 128-255
• 256-511
• 512-1023
• 1024-1518
• Giants (packets with more than 1518 bytes)
Port Type
Provides the following administrative information about the port:
• Admin/Link Status indicates the connection status of the port:
- ON indicates that the port has a valid link signal or does not support a link
signal.
- OFF indicates that the port has been turned off through management
action.
- NLK (No Link) indicates that the port does not have a link to a device at
the other end of the cable, or that there is no cable attached.
- SEG (Segmented) indicates that the port has been segmented by the
repeater due to an excessive collision level.
• Admin Status displays either ON or OFF, an indication of whether
management has the port enabled or disabled. A port can be ON but not
operational; for example, under the Admin display, ports that are segmented
or not linked are shown as ON.
NOTE
For the statistical port display form options listed above, three dashes (- - -) will display
for all inactive ports; any active (green) port will display a numeric value, even if it’s
0.0000.
NOTE
Because BNC thin coax, AUI, and transceiver ports do not support the link feature, the
displayed Admin/Link status for those ports may be misleading: for example, a BNC port
will display as segmented when, in fact, there is no cable or terminator attached or the
cable has been disconnected; an AUI or transceiver port will display as on (with a valid
link signal) even when no cable is attached. Be sure to keep these anomalies in mind when
troubleshooting a device so equipped.