Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual page 199

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communicate with the root of the spanning tree. A BRF will use the base MAC
address + 0x20 for the ID. The first defined CRF will use the base MAC
address + 0x21 for the ID, etc.
Dsg PId (Designated Port Id)
Port on the designated bridge through which this switch will communicate with the
root of the spanning tree. This information is useful if the switch is the designated
bridge on one or more network segments.
# Chgs
Number of topology changes, that is, the number of times the CRF has entered the
forwarding state plus the number of times the CRF has made the transition from
forwarding to blocking. The counter is reset when the switch is reset or the
spanning tree is turned on.
Last Chg
Time since the CRF last entered the forwarding state or made the transition from
forwarding to blocking.
You cannot change any information on this screen. To change the spanning tree
parameters, refer to the section "Spanning Tree for BRF Screen" on page 96.
Monitoring the Network from the Console Statistics Menu SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01