KTI Networks KFS-2621 User Manual page 56

Status
Port No.
RPC
Priority
State
Status
Designated Bridge
Designated Port
Description
Port
Path cost of the p
Port priority
Root Port – A forwarding port that is the best port from Nonroot-bridge to Root
bridge
Designated Port – A forwarding port for every LAN segment
Alternate – An alternate path to the root bridge. This path is different than using the
root port.
Back Up - A backup/redundant path to a segment where another bridge port already
connects.
Forwarding – A port receiving and sending data, normal operation. STP still
monitors incoming BPDUs that would indicate it should return to the blocking state
to prevent a loop.
Blocking - A port that would cause a switching loop, no user data is sent or received
but it may go into forwarding mode if the other links in use were to fail and the
spanning tree algorithm determines the port may transition to the forwarding state.
BPDU data is still received in blocking state.
Listening - The switch processes BPDUs and awaits possible new information that
would cause it to return to the blocking state.
Learning - While the port does not yet forward frames (packets) it does learn source
addresses from frames received and adds them to the filtering database (switching
database)
ID of the STP gridge who designated the root port
Port number of the bridge from where the bridge designated the root port
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