Users Guide

Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
------------------------------------------------------------------
ethernet1/1/4 128.272 128 500 BLK 500 32769 90b1.1cf4.a911 128.272
Loop guard
OS10(config)# interface ethernet 1/1/4
OS10(conf-if-eth1/1/4)# spanning-tree guard loop
OS10(conf-if-eth1/1/4)# do show spanning-tree interface ethernet 1/1/4
ethernet1/1/4 of vlan1 is root Forwarding
Edge port:no (default) port guard :none (default)
Link type is point-to-point (auto)
Boundary: NO bpdu filter : bpdu guard : bpduguard shutdown-on-
violation :disable RootGuard: disable LoopGuard enable
Bpdus (MRecords) sent 7, received 20
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
-------------------------------------------------------------------------
ethernet1/1/4 128.272 128 500 FWD 0 32769 90b1.1cf4.9d3b 128.272
Root guard
OS10(conf-if-eth1/1/4)# spanning-tree guard root
OS10(conf-if-eth1/1/4)# do show spanning-tree interface ethernet 1/1/4
ethernet1/1/4 of vlan1 is root Forwarding
Edge port:no (default) port guard :none (default)
Link type is point-to-point (auto)
Boundary: NO bpdu filter : bpdu guard : bpduguard shutdown-on-
violation :disable RootGuard: enable LoopGuard disable
Bpdus (MRecords) sent 7, received 33
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
-------------------------------------------------------------------
ethernet1/1/4 128.272 128 500 BLK 500 32769 90b1.1cf4.a911 128.272
Recover from BPDU guard violations
1. When there is BPDU guard violation on a port, OS10 either shuts down the port or moves it to BLOCKED state. Use the following
command in CONFIGURATION mode to shutdown the port. The no version of the command moves the port to BLOCKED state.
errdisable detect cause bpduguard
2. In CONFIGURATION mode, use the following command to recover the ports from shutting down due to the detection of a BPDU
Guard violation. When the recovery option is enabled, the port is brought up after the recovery timer expires. The default recovery
timer value is 60 seconds. When the recovery option is disabled, the port remains shut down indefinitely. You must manually bring up
the port using the
no shutdown command.
errdisable recovery cause bpduguard
The no version of the command disables the recovery option.
3. To change the recover timer value, use the following command in CONFIGURATION mode.
errdisable recovery interval interval-value
Example configuration
OS10(config)# errdisable detect cause bpduguard
OS10(config)# errdisable recovery interval 45
OS10(config)# errdisable recovery cause bpduguard
View detect and recovery details
OS10# show errdisable detect
Error-Disable Cause Detect Status
420
Layer 2