Cabletron Systems SPECTRUM FDM, Руководство пользователя

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9030829 E5 Configuration Views
4-7
Concentrator Device Configuration View
SMT Information
SMT Information
The SMT Information section provides the following information:
SMT Version
The version of Station Management (SMT) running on this concentrator.
OBS Present
Indicates whether an Optical Bypass Switch (OBS) is connected to this
concentrator.
T-Notify (sec)
The timer used in the Neighbor Notification protocol. Values can range
between 2 and 30 seconds. If this timer expires before the station has received
a Neighbor Identification Frame (NIF) from the neighbor station, the station
will begin troubleshooting for a loss of contact.
T-Req (milli sec)
The Target Token Rotation Time (TTRT) bid made by this concentrator, in
milliseconds.
T-Neg (milli sec)
The winning TTRT bid on the ring displayed in milliseconds.
TVX (milli sec)
The valid transmission timer. The TVX detects excessive ring noise, token
loss, and other faults. When the station receives a valid frame or token the
TVX resets. If the TVX expires, the station starts a ring initialization
sequence.
Through-A Indicates that the primary ring is connected to the MAC (from
PHY-A/Primary In to MAC to Primary Out/PHY-B). The
secondary ring is isolated from the MAC (from PHY-B/Secondary
In to PHY-A/Secondary Out).
Through-B Indicates that the secondary ring is connected to the MAC (from
PHY-B/Secondary In to MAC to Secondary Out/PHY-A). The
primary ring is isolated from the MAC (from PHY-A/Primary In
to PHY-B/Primary Out).
Table 4-2. Ring Connection Descriptions
Configuration Description