Specifications

Chapter 5. IBM System Networking RackSwitch implementation 181
To verify the STP configuration and operation, run the following command with the output
from the reference architecture.
The spanning-tree stp <STG number> [bridge|information]command shows detailed
information about the STP operation. If you do not provide an STG number, the command
output displays the STP information for all groups, as shown in Example 5-32. If you want to
narrow the output to a specific STG, add the optional parameters.
Example 5-32 show spanning-tree command output
ACC-1#show spanning-tree
------------------------------------------------------------------
Pvst+ compatibility mode enabled
------------------------------------------------------------------
Spanning Tree Group 1: On (PVRST)
VLANs: 1
Current Root: Path-Cost Port Hello MaxAge FwdDel
1000 02:1c:73:08:ea:0b 1990 22 2 20 15
Parameters: Priority Hello MaxAge FwdDel Aging Topology Change Counts
32769 2 20 15 300 43
Port Prio Cost State Role Designated Bridge Des Port Type
------------- ---- ---------- ----- ---- ---------------------- -------- ----
13 128 2000! FWD DESG 8001-08:17:f4:34:4d:00 800d P2P
22 (pc13) 128 1990!+ FWD ROOT 1000-02:1c:73:08:ea:0b 8068 P2P
23 (pc14) 128 1990!+ DISC ALTN 1000-02:1c:73:08:ea:0b 8068 P2P
24 0 0 FWD *
* = STP turned off for this port.
! = Automatic path cost.
+ = Portchannel cost, not the individual port cost.
------------------------------------------------------------------
Spanning Tree Group 10: On (PVRST)
VLANs: 10
Current Root: Path-Cost Port Hello MaxAge FwdDel
000a 08:17:f4:34:4d:00 0 0 2 20 15
Parameters: Priority Hello MaxAge FwdDel Aging Topology Change Counts
10 2 20 15 300 10
Port Prio Cost State Role Designated Bridge Des Port Type
------------- ---- ---------- ----- ---- ---------------------- -------- ----
5 (pc15) 128 1990!+ FWD DESG 000a-08:17:f4:34:4d:00 8029 P2P
! = Automatic path cost.
+ = Portchannel cost, not the individual port cost.
------------------------------------------------------------------
Spanning Tree Group 20: On (PVRST)
VLANs: 20
Current Root: Path-Cost Port Hello MaxAge FwdDel
0014 08:17:f4:34:4c:00 1990 5 2 20 15