Cisco Catalyst 4500 Series - Page 314

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
errdisable detect
To prevent the port from shutting down, you can use the shutdown vlan option to shut down just the
offending VLAN on the port where the violation occured. This option is available for the following three
causes: bpduguard, arp-inspection, and dhcp-rate-limit. You can use the clear errdisable command to
recover disabled VLANs on a port.
Examples This example shows how to enable error-disable detection for the link-flap error-disable cause:
Switch(config)# errdisable detect cause link-flap
Switch(config)#
This example shows how to enable per-VLAN error-disable detection for BPDU guard:
Switch(config)# errdisable detect cause bpduguard shutdown vlan
Switch(config)#
This example shows how to disable error-disable detection for DAI:
Switch(config)# no errdisable detect cause arp-inspection
Switch(config)# end
Switch# show errdisable detect
ErrDisable Reason Detection Mode
----------------- ---------- ------
arp-inspection Enabled port
bpduguard Enabled vlan
channel-misconfig Enabled port
dhcp-rate-limit Enabled port
dtp-flap Enabled port
gbic-invalid Enabled port
psecure-violation Enabled port/vlan
Switch#
Related Commands Command Description
show errdisable detect Displays the error disable detection status.
show interfaces status Displays the interface status or a list of interfaces in
error-disabled state.