Disabling Backbonefast; Configuring Loop Guard On The Switch; Enabling Loop Guard - Cisco WS-C6506 Software Manual

Chapter 9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard
Vlan
----- -------- --------- -------- ---------- ----------
----- -------- --------- -------- ---------- ----------
Total
BackboneFast statistics
-----------------------
Number of inferior BPDUs received (all VLANs)
Number of RLQ req PDUs received (all VLANs)
Number of RLQ res PDUs received (all VLANs)
Number of RLQ req PDUs transmitted (all VLANs) : 0
Number of RLQ res PDUs transmitted (all VLANs) : 0
Console> (enable)

Disabling BackboneFast

To disable BackboneFast on the switch, perform this task in privileged mode:
Task
Step 1 Disable BackboneFast on the switch.
Step 2 Verify that BackboneFast is disabled.
This example shows how to disable BackboneFast on the switch and verify the configuration:
Console> (enable) set spantree backbonefast disable
Backbonefast enabled for all VLANs
Console> (enable) show spantree backbonefast
Backbonefast is disable.
Console> (enable)

Configuring Loop Guard on the Switch

These sections describe how to configure BackboneFast:
•
•

Enabling Loop Guard

Use the set spantree guard command to enable or disable the spanning-tree loop guard on a per-port
basis.
To enable loop guard on the switch, perform this task in privileged mode:
Task
Step 1 Enable loop guard on a port.
Step 2 Verify that loop guard is enabled.
OL-8978-04
Blocking Listening Learning Forwarding STP Active
1 0 0
Blocking Listening Learning Forwarding STP Active
0 0
Enabling Loop Guard, page 9-19
Disabling Loop Guard, page 9-20
0 1
0 1
: 0
: 0
: 0
Command
set spantree backbonefast disable
show spantree backbonefast
Command
set spantree guard loop mod/port
show spantree guard {mod/port | vlan} mistp-instance
instance
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Configuring Loop Guard on the Switch
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1
9-19