User manual
Information Commands 27
Table 19 STP parameters
Parameter Description
FwdDel The forward delay parameter specifies, in seconds, the amount of time that a bridge port has
to wait before it changes from learning state to forwarding state.
Aging The aging time parameter specifies, in seconds, the amount of time the bridge waits without
receiving a packet from a station before removing the station from the Forwarding Database.
Priority (port) The port priority parameter helps determine which bridge port becomes the designated port.
In a network topology that has multiple bridge ports connected to a single segment, the port
with the lowest port priority becomes the designated port for the segment.
Cost The port path cost parameter is used to help determine the designated port for a segment.
Generally speaking, the faster the port, the lower the path cost.
State The State field shows the current state of the port. The State field can be one of the
following: BLOCKING, LISTENING, LEARNING, FORWARDING, or DISABLED.
Designated
bridge
Shows information about the bridge connected to each port, if applicable. Information
includes the priority (hex) and MAC address of the Designated Bridge.
Designated port The port ID of the port on the Designated Bridge to which this port is connected.
Rapid Spanning Tree and Multiple Spanning Tree information
The following command displays RSTP/MSTP information:
show spanning-tree stp <1-32> information
Command mode: All
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upfast disabled, update 40
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Spanning Tree Group 1: On (RSTP)
VLANs: 1-3 4095
Current Root: Path-Cost Port Hello MaxAge FwdDel Aging
8000 00:00:01:00:19:00 0 0 9 20 15 300
Parameters: Priority Hello MaxAge FwdDel Aging
32768 9 20 15 300
Port Prio Cost State Role Designated Bridge Des Port Type
---- ---- ---- ------ ---- --------------------- -------- ----
1 0 0 DSB
2 0 0 DSB
3 0 0 DSB
4 0 0 DSB
5 0 0 DSB
6 0 0 DSB
7 0 0 DSB
8 0 0 DSB
9 0 0 DSB
10 0 0 DISC
11 0 0 FWD DESG 8000-00:00:01:00:19:00 8017 P2P2,Edge
12 0 0 FWD DESG 8000-00:00:01:00:19:00 8018 P2P