Reference Guide

Column Meaning
Auto-Recovery Time Left The amount of time left before auto recovery begins.
(Extreme 220) (Routing) #show interfaces status err-disabled
Interface Errdisable Reason Auto-Recovery Time Left(sec)
---------- ----------------- ------------------
0/1 udld 279
0/2 bpduguard 285
0/3 bpdustorm 291
0/4 keepalive 11
UniDirectional Link Detection Commands
The purpose of the UniDirectional Link Detection (UDLD) feature is to detect and avoid unidirectional
links. A unidirectional link is a forwarding anomaly in a Layer 2 communication channel in which a bi-
directional link stops passing trac in one direction. Use the UDLD commands to detect unidirectional
links’ physical ports. UDLD must be enabled on both sides of the link in order to detect a unidirectional
link. The UDLD protocol operates by exchanging packets containing information about neighboring
devices.
udld enable (Global Config)
This command enables UDLD globally on the switch.
Default
Disabled
Format udld enable
Mode Global Config
no udld enable (Global Config)
This command disables udld globally on the switch.
Format
no udld enable
Mode Global Config
udld message time
This command configures the interval between UDLD probe messages on ports that are in the
advertisement phase. The range is from 7 to 90 seconds.
Default
15 seconds
Format udld message time interval
Mode Global Config
Switching Commands
ExtremeSwitching 200 Series: Command Reference Guide for version 01 .02.04.0007 495