Juniper JUNOSE 11.2.X PHYSICAL LAYER Configuration Manual page 213

debounce-interval
duplex
Copyright © 2010, Juniper Networks, Inc.
In networks where a link alternates between the up and down state for brief periods,
we recommend that you set a longer debounce interval to prevent the router from
prematurely and unnecessarily tearing down and rebuilding the PPPoE connections
during brief network outages.
In networks where the interface changes to a down state and remains in the down
state for long periods of time, we recommend that you set a shorter debounce interval
to minimize the latency (delay) required for the interface to notify the upper-layer
protocols of the state change. When you set a longer debounce interval, the latency
increases.
We recommend that you disable the debounce feature in networks that require
faster link status notifications to upper links.
The debounce feature is not supported for Ethernet interfaces on which either IEEE
802.3ad link aggregation is configured.
The setting of the debounce command persists after you reboot the router.
Example
host1(config-if)#debounce 3
Use the no version to restore the default behavior, which disables debounce on the
interface.
See debounce.
Use to modify the minimum time an Ethernet interface must maintain a given state—for
example, up or down—before the interface notifies the upper-layer protocols of the
state change. The interval can be in the range 1–5 seconds.
NOTE: Debounce configuration is supported for all Ethernet module combinations on
E Series routers.
You can configure this command only if you have enabled the debounce timer feature
using the debounce command. After you enable this feature, you can use the
debounce-interval command to modify the debounce interval.
The setting of the debounce-interval command persists after you reboot the router.
Example
host1(config-if)#debounce—interval 4
Use the no version to restore the default value, 1 second.
See debounce-interval.
Chapter 5: Configuring Ethernet Interfaces
191