Figure 28-17 Stp Status Down; Figure 28-18 Stp Counter Display Example; Table 28-8 Menu 24.1.2 - Spanning Tree Protocol Status - ZyXEL Communications IES-2000 User Manual

You'll see a screen similar to the following one if STP is enabled.
Bridge Info:
(1) DesignatedRootBridgeID:
(2) RootPathCost:
(3) RootPortID:
(4) MaxAge:
(5) HelloTime:
(6) ForwardDelay:
(7) BridgeID:
(8) BMaxAge:
(9) BHelloTime:
(10) BForwardDelay:
(11) TopologyChangeDetected:
(12) TopologyChange:
(13) TopologyChangeTime:
(14) HoldTime:
Port_12 Info:
(1) Port ID:
(2) Port State:
(3) Enable:
(4) PathCost:
(5) Designated Root:
(6) Designated Cost:
(7) Designated Bridge:
(8) Designated Port:
(9) TopologyChangeAcknowledge:
(10)ConfigPending:
(11) ForwardTransition:
STP Counter:
SendConfCount:
SendTCNCount:
RecConfigBPDU:
RecTCNBPDU:
FIELD
Bridge Info
DesignatedRootBridge
ID
RootPathCost
RootPortID
MaxAge
HelloTime
BForwardDelay
Switch-Related Commands
vlc1012> sw stp disp
Spanning Tree Protocol is down

Figure 28-17 STP Status Down

Figure 28-18 STP Counter Display Example

Table 28-8 Menu 24.1.2 - Spanning Tree Protocol Status

This is a unique identifier for the device that is assumed to be the root device (or
simply the "root") for a bridged LAN, consisting of bridge priority plus MAC address.
This is the cost for a packet to travel to the root in the current Spanning Tree
configuration. The slower the media, the higher the cost. This is 0 if the device is the
root.
This is the index of the port on this device that is closest to the root. This device
sends frames towards the root device through this port. This is 0X0000 for the root.
This is the maximum time (in 256
a configuration message before attempting to reconfigure.
This is the time interval (in 256
configuration message.
This is the time (in 256
8000-00a0c5012345
0
0x0000
5120 (1/256 sec)
512 (1/256 sec)
3840 (1/256 sec)
8000-00a0c5012345
5120 (1/256 sec)
512 (1/256 sec)
3840 (1/256 sec)
0
0
8960 (1/256 sec)
256 (1/256 sec)
0x8000c
4
1
100
8000-00a0c5012345
0
8000-00a0c5012345
0x8000
0
0
1
262
0
0
0
DESCRIPTION
th
s of a second) a device can wait without receiving
th
s of a second) at which the root device transmits a
th
s of a second) for a device to wait before changing states.
IES-2000/3000 User's Guide
28-17