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A CRF that does not connect to other switches or bridges is always forwarding.
When the switch is booted, all CRFs are blocked initially, and then some of them change to a different state: listening, learning, and forwarding, in that order. All CRFs that are going to change states from blocking to forwarding will have done so after two to three times the value of:
Switch Maximum Message Age + (2 x Switch Forward Delay)
DCst (Designated Cost)
Cost for a packet to travel from this CRF to the root in the current spanning tree configuration. The slower the media, the higher the cost.
Dsg SwId/BrId (Designated Switch Id/Bridge Id)
Priority and ID of the device through which this port has determined it must 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 SmartStack
# 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 99.
Monitoring the Network from the Console Statistics Menu SmartStack
