Reference Guide

Interfaces | 581
Usage Information
When you configure keepalive, the system sends a self-addressed packet out of the configured
interface to verify that the far end of a WAN link is up. When you configure no 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)
e
Enable Link Fault Signaling (LFS) on EtherScale 10 Gigabit Ethernet interfaces only.
Syntax
lfs enable
To disable LFS, enter no lfs enable.
Defaults
Enabled.
Command Modes
INTERFACE (10 Gigabit Ethernet interfaces only)
Command History
Usage Information
If there is a failure on the link, FTOS brings down the interface. The interface will stay down until the
link failure signal stops.
link debounce-timer
e
Assign the debounce time for link change notification on this interface.
Syntax
link debounce [milliseconds]
Parameters
Command Modes
INTERFACE
Command History
Usage Information
Changes do not affect any ongoing debounces. The timer changes take affect from the next debounce
onward.
Version 7.5.1.0 Introduced on C-Series
pre-Version 6.2.1.0 Introduced for E-Series
pre-Version 6.1.1.0 Introduced for E-Series
Note: On TeraScale line cards, LFS is always enabled by default.
milliseconds
Enter the time to delay link status change notification on this interface.
Range: 100-5000 ms
• Default for copper is 3100 ms
• Default for fiber is 100 ms
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on E-Series