Lfs Enable (Etherscale); Link Debounce-Timer - Dell Force10 Z9000 Reference Manual

keepalive, the system does not send keepalive packets and so the local end of a WAN link
remains up even if the remote end is down.

lfs enable (EtherScale)

Enable link fault signaling (LFS) on EtherScale 10 Gigabit Ethernet interfaces only.
E-Series
Syntax lfs enable
To disable LFS, use the no lfs enable command.
Defaults Enabled
Command Mode INTERFACE (10 Gigabit Ethernet interfaces only)
Command History
pre-Version
6.1.1.0
Usage If there is a failure on the link, FTOS brings down the interface. The interface will stay down
Information until the link failure signal stops.

link debounce-timer

Assign the debounce time for link change notification on this interface.
E-Series
Syntax link debounce [milliseconds]
Parameters
milliseconds
Command Modes INTERFACE
Command History
Version 8.2.1.0
Version 7.6.1.0
Usage Changes do not affect any ongoing debounces. The timer changes take affect from the next
Information debounce onward.
710
Introduced for E-Series.
NOTE: On TeraScale line cards, LFS is always enabled by default.
Enter the time to delay link status change notification on this
interface. The range is 100 to 5000 ms. The default for copper is 3100
ms. The default is for fiber is 100 ms.
Introduced on the E-Series ExaScale.
Introduced on the E-Series.