578 | Layer 2
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5. If the FEFD system has been set to Aggressive mode and neighboring echoes are not received after
three intervals, the state changes to Err-disabled. All interfaces in the Err-disabled state must be
manually reset using the
fefd reset [interface] command in EXEC privilege mode (it can be done
globally or one interface at a time) before the FEFD enabled system can become operational again.
Important Points to Remember
• FEFD enabled ports are subject to an 8 to 10 second delay during an RPM failover before becoming
operational.
• FEFD can be enabled globally or on a per interface basis, interface FEFD configurations override
global FEFD configurations.
• FTOS supports FEFD on physical Ethernet interfaces only, excluding the management interface.
Configuring FEFD
You can configure FEFD for all interfaces from CONFIGURATION mode, or on individual interfaces
from INTERFACE mode.
Enable FEFD Globally
To enable FEFD globally on all interfaces enter the command fefd-global in CONFIGURATION mode.
Report interval frequency and mode adjustments can be made by supplementing this command as well.
Table 25-1. State Changes When Configuring FEFD
Local Event Mode Local State Remote State
Local
Admin
Status
Local
Protocol
Status
Remote
Admin
Status
Remote
Protocol
Status
Shutdown Normal Admin Shutdown Unknown Down Down Up Down
Shutdown Aggressive Admin Shutdown Err-disabled Up Down Up Down
FEFD enable Normal Bi-directional Bi-directional Up Up Up Up
FEFD enable Aggressive Bi-directional Bi-directional Up Up Up Up
FEFD + FEFD disable Normal Locally disabled Unknown Up Down Up Down
FEFD + FEFD disable Aggressive Locally disabled Err-disabled Up Down Up Down
Link Failure Normal Unknown Unknown Up Down Up Down
Link Failure Aggressive Err-disabled Err-disabled Up Down Up Down
Step Task Command Syntax Command Mode
1
Setup two or more connected
interfaces for Layer 2 or Layer 3 use
ip address ip
address
, switchport
INTERFACE
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