Cabletron Systems STHI 사용자 설명서

Page 5-27

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A Token Error may indicate that an active monitor either has detected a 
recirculating frame or token, or has found that its Timer Valid 
Transmission (TVX) time has expired before any token has been detected 
circulating on the ring (i.e.: a lost frame error has occurred). The active 
monitor is responsible for purging the ring and issuing new tokens in 
response to these errors.

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A Frequency Error may indicate that the frequency of the incoming signal 
deviates excessively from that of the reporting station’s onboard crystal 
oscillator. When frequency errors are detected, the ring enters the monitor 
contention process to establish a new active monitor.

Figure 5-14.  SNMP Tool Screen

Through the SNMP Tool screen, the user can access information stored in 
the STHI hub’s Management Information Base (MIB). MIBs and their 
objects are logically arranged as trees with subsequent branches and 
leaves; each leaf is a MIB object. One leaf, for example, contains the hub’s 

     STHI LOCAL MANAGEMENT                  Flash Image Version:  1.00.00

                                 SNMP TOOLS

                       COMMUNITY NAME: 

                          OID PREPEND: 

     F6     F7      F8                      F9

                                      F10