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Monitoring Hub Performance 2-7
Using the SEHI100TX Hub View
Hub View Port Color Codes
The Port Status boxes in the Hub View are color coded to indicate the portÕs
connection status. The colors are consistent for all Port Display Forms except
Admin Status; the exceptions are noted below.
¥ Green indicates that the port is active; that is, the port has been enabled by
management, has a valid Link signal (if applicable), and is able to
communicate with the station at the other end of the portÕs cable segment.
Note that an AUI or transceiver port will display as active as long as it has been
enabled by management, even if no cable is connected.
¥ Blue indicates that the port has been disabled through management.
¥ Yellow indicates that the port is enabled but does not currently have a valid
connection. This usually indicates that the device at the other end of the
segment is turned off.
¥ Red indicates that the port is enabled, but is not able to pass packets. This
generally means that the port has been segmented by management after
experiencing an excessive number of collisions; for a BNC (thin coax) port,
however, this may only mean that no cable or terminator has been connected.
When the Admin Status port display option is active, only two colors apply: a
port will be displayed in green if it is enabled by management, regardless of
whether or not there is a cable attached or a valid link signal detected; a port
disabled by management will display as blue.
Monitoring Hub Performance
The information displayed in the Hub View can give you a quick summary of
device activity, status, and conÞguration. SPMA can also provide further details
about device performance via its three-level menu structure. The Device, Module,
and Port menus (Figure 2-5) give you control over the device at these three levels
and give you access to the tools, menus, and windows that let you monitor
speciÞc aspects of device performance, change hub display options, and set
SEHI100TX operating and notiÞcation parameters. Remember, though many
functions will operate the same at each level, those accessed via the Device menu
control or provide information about the SEHI100TX-managed stack as a whole;
those accessed via the Module menu control or provide information about a
single hub in the stack; and those accessed via the Port menu control or provide
information about a single port.