Command Reference Guide

N8406-022A 1Gb Intelligent L2 Switch Command Reference Guide (ISCLI) 28
Spanning Tree information
The following table describes the Spanning Tree Protocol (STP) information commands.
Table 20 STP information commands
Command
Usage
show spanning-tree stp <1-32>
Displays information about the spanning tree group.
Command mode: All
show spanning-tree stp <1-32> bridge
Displays STP bridge information.
Command mode: All
show spanning-tree stp <1-32>
information
Displays STP information.
Command mode: All
show spanning-tree
Displays all STP information.
Command mode: All
The following command displays Spanning Tree information:
show spanning-tree
Command mode: All
------------------------------------------------------------------
upfast disabled, update 40
------------------------------------------------------------------
Spanning Tree Group 1: On (STP/PVST+)
VLANs: 1
Current Root: Path-Cost Port Hello MaxAge FwdDel
8000 00:02:a5:d1:0f:ed 8 20 2 20 15
Parameters: Priority Hello MaxAge FwdDel Aging
32768 2 20 15 300
Port Priority Cost FastFwd State Designated Bridge Des Port
---- -------- ---- -------- ---------- --------------------- -------
1 0 0 n FORWARDING *
2 0 0 n FORWARDING *
3 0 0 n FORWARDING *
The switch software uses the IEEE 802.1D Spanning Tree Protocol (STP). If RSTP/MSTP is turned on, see the
―Rapid Spanning Tree information‖ section for Spanning Tree Group information. In addition to seeing if STP is
enabled or disabled, you can view the following STP bridge information:
Status of Uplink Fast (upfast)
Current root MAC address
Path cost
Port
Hello interval
Maximum age value
Forwarding delay
Aging time
You can also refer to the following port-specific STP information:
Port number and priority
Cost
State
Port Fast Forwarding state
Designated bridge
Designated port
The following table describes the STP parameters.