Connectivity Guide

If the interface state changes to err-disabled, use the fefd reset [interface] global command to reset these interfaces. The
unknown or err-disabled state brings the line protocol down so that the protocols above it can detect that the peer link is down.
Table 7. FEFD state changes
Local event
(User
intervention)
Congured
FEFD mode
Local state
(Show display)
(Result)
Local admin
State
(Result)
Local line
protocol
Status
(Result)
Remote state
(Show display)
(Result)
Remote admin
state
Remote line
protocol status
Shutdown(user
conguration)
Normal Admin
Shutdown
Down Down Line protocol is
down.
Up Down
Shutdown(user
conguration)
Aggressive Admin
Shutdown
Down Down Line protocol is
down.
Up Down
FEFD+ FEFD
disable(user
conguration)
Normal Locally disabled Up Up Unknown Up Down
FEFD + FEFD
disable(user
conguration)
Aggressive Locally disabled Up Down Err-disabled Up Down
Link Failure
(Remove cable
or transceiver)
Normal Unknown Up Down Unknown Up Down
Link
Failure(Remove
cable or
transceiver)
Aggressive Unknown Up Down Unknown Up Down
FEFD
enable(user
conguration)
Normal Bi-directional Up Up Bi-directional Up Up
FEFD
enable(user
conguration)
Aggressive Bi-directional Up Up Bi-directional Up Up
Restrictions
• You can enable FEFD globally or on an interface. If FEFD is enabled globally, the FEFD interface conguration overrides global FEFD
conguration.
• OS10 supports FEFD only on physical interfaces. FEFD is not supported on any other interfaces. However, you can enable FEFD on
individual physical interfaces that belong to a port channel.
Enable FEFD globally
To congure FEFD globally:
1 Do one of the following:
• Congure FEFD Normal mode globally using the fefd-global command in CONFIGURATION mode.
OS10(Config)# fefd-global
• Congure FEFD Normal mode globally using the fefd-global mode normal command in CONFIGURATION mode.
OS10(Config)# fefd-global mode normal
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