8- and 24-Port Gigabit L2 Managed Power-over-Ethernet (PoE) Switches
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Force Version: Shows the current spanning tree protocol version configured.
Bridge Max Age: Shows the bridge’s Max Age setting.
Bridge Forward Delay: Shows the bridge’s Forward Delay setting.
Bridge Max Hops: Shows the bridge’s Max Hops setting.
Instance Priority: Spanning tree priority value for a specific tree instance (CIST or MSTI).
Bridge Mac Address: The bridge’s Mac Address.
CIST ROOT PRIORITY: The CIST root bridge’s spanning tree priority value.
CIST ROOT MAC: The CIST root bridge’s MAC address.
CIST EXTERNAL ROOT PATH COST: Root path cost value from the point of view of the bridge’s MST region.
CIST ROOT PORT ID: The port ID of the bridge’s root port. In MSTP, a peer port of a root port may reside in a different MST region or
in the same MST region. The first case indicates that the root port’s owner is the CIST regional root bridge.
CIST REGIONAL ROOT PRIORITY: Spanning tree priority value of the CIST regional root bridge. Note that CIST Regional Root bridge is
different from CIST Root bridge. One exception is that when a bridge belonging to an MST region is the root bridge of the CST
(Common Spanning Tree). An MST Region in the CST can be regarded as a common RSTP bridge. The IST (Internal Spanning Tree)
and MSTIs are transparent to bridges outside this region.
CIST REGIONAL ROOT MAC: Mac Address of the CIST regional root bridge.
CIST INTERNAL ROOT PATH COST: Root path cost value from the point of view of the bridges inside the IST.
CIST CURRENT MAX AGE: Max Age of the CIST Root bridge.
CIST CURRENT FORWARD DELAY: Forward Delay of the CIST Root bridge.
TIME SINCE LAST TOPOLOGY CHANGE (SECs): Time Since Last Topology Change is the elapsed time in units of seconds for a bunch
of “Topology Change and (or) Topology Change Notification receiving” to occur. When a new series of Topology Changes occur
again, this counter will be reset to 0.
TOPOLOGY CHANGE COUNT (SECs): The per spanning tree instance Topology Change Count expresses the time spent in units of
seconds since the beginning of the Spanning Tree Topology Change to the end of the STP convergence. Once there is no topology
change occurring and no more topology change notifications are received, the Topology Change count will be reset to 0.
Figure 4-157. Port Status.
Parameter description:
Port No: 1–8
Status: The forwarding status.has the same definition as the RSTP specification. Possible values are “FORWARDING,” “LEARNING,”
and “DISCARDING.”