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Figure 123: Spanning Tree Port Status
PARAMETERS
These parameters are displayed:
◆ Port – Port Identifier.
◆ CIST Role – Roles are assigned according to whether the port is part of the active
topology connecting the bridge to the root bridge (i.e., root port), connecting a LAN through
the bridge to the root bridge (i.e., designated port); or is an alternate or backup port that
may provide connectivity if other bridges, bridge ports, or LANs fail or are removed.
◆ CIST State – Displays current state of this port within the Spanning Tree:
■ Blocking – Port receives STA configuration messages, but does not forward packets.
■ Learning – Port has transmitted configuration messages for an interval set by the
Forward Delay parameter without receiving contradictory information. Port address table is
cleared, and the port begins learning addresses.
■ Forwarding – Port forwards packets, and continues learning addresses.
◆ Uptime – The time since the bridge port was last initialized.
WEB INTERFACE
To display information on spanning tree port status, click Monitor, Spanning Tree, Port Status.
Displaying STP Port Statistics
Use the Port Statistics page to display statistics on spanning tree protocol packets crossing
each port.
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