Cabletron Systems EMM-E6 User Manual
Page 28
Using the EMM-E6 Hub View
2-12
Monitoring Hub Performance
-
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.
•
Active Ports
displays either YES or NO for any active (green) port, indicating
whether or not that port has seen any traffic at all since the device was last
initialized; this port display form can tell you whether any port whose
statistics are not currently incrementing has seen some activity in the past.
Non-green (presumably inactive) ports will display three dashes (---),
regardless of their past statistical activity.
•
Topology
displays either TRUNK or STN (station), a status which is defined
by how many source addresses are communicating through that port at any
given moment: if zero, one, or two addresses are communicating, the port is
considered to be a station port; if more than two addresses are communicating,
the port is considered to be a trunk port. See
,
, for more information.
•
FNB Channel
displays a letter which indicates each port’s current channel
assignment: A, B, C, or SA (stand-alone).
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; and 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 hub so equipped.
NOTE
If you use the Trunk Type option on the Port menu to manually change a port’s topology
status from Force Trunk to Not Forced, any status change from trunk to station will not
be reflected in the port display until the current cycle of the Source Address timer is
complete. See Chapter 6, Source Addressing, for more information on the timer.
Older versions of EMM-E6 firmware (previous to revision level 2.00.16) use slightly
different definitions of station and trunk status: station ports are defined as those which
are detecting no source addresses or only a single source address; trunk ports are those
detecting two or more. If you have any questions about which definition your version of
firmware employs, or if you would like information about upgrading your EMM-E6
firmware, contact the Cabletron Systems Global Call Center. Also, see Chapter 6, Source
Addressing
, and Chapter 7, Security, for more information about station and trunk
status.