Administrator Guide

Layer 2 Switching Commands 398
console(config)#interface range gi1/0/1,te1/1/1
console(config)#interface range gigabitEthernet 1/0/10,tengigabitEthernet
1/1/2
link debounce time
Use the link debounce time command to configure the debounce timer for
one or multiple interfaces. Use the no form of the command to set the link
debounce time to the default. Use a time of 0 ms to disable link bounce
hysteresis on an interface.
Syntax
link debounce time [ timeout ]
no link debounce time
• timeout —An integer value in the range of 0–5000 milliseconds.
Default Configuration
Physical interfaces do not have debounce enabled by default.
Command Mode
Interface (Physical) Configuration mode, Interface Range mode.
User Guidelines
The link bounce time configures a link bounce hysteresis on link loss of link.
Loss of link signal starts a link bounce timer. If the link is restored prior to
expiry of the timer, operation continues and the system is not notified that
that link connectivity has been lost. Hysteresis can be used to mitigate link
flaps caused by bad cabling or partially inserted optics or cables.
The debounce timer resolution is approximately 10 ms. Setting a value
greater than 100 will start the timer when loss of link is detected.
Ports operating at lower speeds may benefit from debounce values larger than
the default. Ports operating over fiber generally do not require larger
debounce times.
2CSNXXX_SWUM204.book Page 398 Monday, January 25, 2016 1:25 PM