Refer to the exhibit. An engineer entered the command no spanning-tree bpduguard enable on interface Fa1/0/7. What is the effect of this command on Fa1/0/7?
A.
It remains in err-disabled state until the errdisable recovery cause failed-port-state command is entered in the global configuration mode
B.
It remains in err-disabled state until the no shutdown command is entered in the interface configuration mode
C.
It remains in err-disabled state until the shutdown/no shutdown command is entered in the interface configuration mode
D.
It remains in err-disabled state until the spanning-tree portfast bpduguard disable command is entered in the interface configuration mode.
When an interface goes into an err-disabled state, it typically remains in that state until it is manually reset. The standard method to reset an interface in an err-disabled state is to issue the shutdown command followed by the no shutdown command in the interface configuration mode. This sequence effectively cycles the interface down and then back up, clearing the err-disabled state.
Therefore, in this case, after entering the no spanning-tree bpduguard enable command, the engineer must also enter the shutdown and no shutdown commands on interface Fa1/0/7 to bring it back up.
generally speaking, yes, it is true - the default behavior, but this setting is hidden from us:
sw2#show errdisable recovery
ErrDisable Reason Timer Status
----------------- --------------
arp-inspection Disabled
bpduguard Disabled
channel-misconfig (STP) Disabled
dhcp-rate-limit Disabled
dtp-flap Disabled
gbic-invalid Disabled
inline-power Disabled
l2ptguard Disabled
link-flap Disabled
mac-limit Disabled
link-monitor-failure Disabled
loopback Disabled
oam-remote-failure Disabled
pagp-flap Disabled
port-mode-failure Disabled
pppoe-ia-rate-limit Disabled
psecure-violation Disabled
security-violation Disabled
sfp-config-mismatch Disabled
storm-control Disabled
udld Disabled
unicast-flood Disabled
...
sw2#
upvoted 3 times
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