Cabletron Systems manual 2-12, Using the EMM-E6 Hub View, Monitoring Hub Performance

Using the EMM-E6 Hub View

-SEG (Segmented) indicates that the port has been segmented by the repeater due to an excessive collision level.

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.

•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 Setting a Port’s Trunk Type, page 2-32, for more information.

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.

•FNB Channel displays a letter which indicates each port’s current channel assignment: A, B, C, or SA (stand-alone).

2-12 Monitoring Hub Performance