22.4.8 Setting the link-down detection timer

If the wait time before a link-down is detected after the detection of a link fault is too short, depending on the remote device, the link might be unstable. You can avoid this problem by setting a link-down detection timer.

Points to note

Make sure that you set as small a link-down detection timer value as possible without risking the link becoming unstable. If the link is stable even when a link-down detection timer is not set, you do not need to set one.

Command examples

1. (config)# interface gigabitethernet 1/0/10

   Switches to the Ethernet interface 1/0/10 configuration mode.

2. (config-if)# link debounce time 5000

   Sets the link-down detection timer value to 5000 milliseconds.

Notes

Using a link-down detection timer can prevent a link from becoming unstable. However, if a fault occurs, the time required for the interface to settle in the link-down status is longer. If you want this time to be short, do not set a link-down detection timer.