Logical Interface Flags

The Logical interface flags field, which provides information about the logical interface, displays one or more of the following values:

ACFC Encapsulation—Address control field Compression (ACFC) encapsulation is enabled (negotiated successfully with a peer).
Device-down—Device has been administratively disabled.
Disabled—Interface is administratively disabled.
Down—A hardware failure has occurred.
Clear-DF-Bit—GRE tunnel or IPSec tunnel is configured to clear the Don't Fragment (DF) bit.
Hardware-Down—Interface protocol initialization failed to complete successfully.
PFC—Protocol field compression is enabled for the PPP session.
Point-To-Point—Interface is point to point.
SNMP-Traps—SNMP trap notifications are enabled.
Up—Interface is enabled and operational.