Configuring Spanning Tree Bpdu Skewing - Cisco WS-C2950SX-48-SI Configuration Manual

Chapter 7 Configuring Spanning Tree
12
13
14
15
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Console> (enable)
Console> (enable) show spantree mst 3
Spanning tree mode
Instance
VLANs Mapped:
Designated Root
Designated Root Priority
Designated Root Cost
Designated Root Port
Bridge ID MAC ADDR
Bridge ID Priority
Port
------------------------ ------------- ---- -------- ----
--------------------
6/1
Boundary(PVST)
6/2
Boundary(PVST)
Console> (enable)

Configuring Spanning Tree BPDU Skewing

Commands that support the spanning tree BPDU skewing feature perform these functions:
•
•
•
To change how spanning tree performs BPDU skewing statistics gathering, enter the set spantree
bpdu-skewing command. The bpdu-skewing command is disabled by default.
To configure the BPDU skewing statistics gathering for a VLAN, perform this task in privileged mode:
Task
Step 1
Configure BPDU skewing.
Step 2
Verify the configuration.
78-15486-01
-
-
999
-
State
forwarding
blocking
Allow you to enable or disable BPDU skewing. The default is disabled.
Modify the show spantree summary output to show if the skew detection is enabled and for which
VLANs or PVST+ or MISTP instances the skew was detected.
Provide a display of the VLAN or PVST+ or MISTP instance and the port affected by the skew:
include this information:
– The duration (in absolute time) of the last skew
– The duration (in absolute time) of the worst skew
– The date and time of the worst duration
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
MST
3
31-40
00-10-7b-bb-2f-00
8195 (root priority:8192, sys ID ext:3)
0 Remaining Hops 20
1/0
00-10-7b-bb-2f-00
8195 (bridge priority:8192, sys ID ext:3)
Role Cost
BDRY 10000
BDRY 20000
Command
set spantree bpdu-skewing [enable | disable]
show spantree bpdu-skewing vlan [mod/port]
show spantree bpdu-skewing mistp-instance [instance] [mod/port]
Configuring Spanning Tree BPDU Skewing
Prio Type
30 P2P,
32 P2P,
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Release 8.1
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