Reference Guide

512 | Layer 2
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To disable FEFD protocol on one interface, enter the command fefd disable in INTERFACE mode.
Disabling an interface will shut down all protocols working on that interface’s connected line, and will not
delete your previous FEFD configuration which can be enabled again at any time.
Figure 26-7. FEFD enabled interface configuration
Debugging FEFD
By entering the command debug fefd events in EXEC privilege mode, output is displayed whenever
events occur that initiate or disrupt an FEFD enabled connection.
Figure 26-8. Debug FEFD events display
Entering the command debug fefd packets in EXEC privilege mode will provide output for each packet
transmission over the FEFD enabled connection.
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
2 Activate the necessary ports
administratively
no shutdown INTERFACE
3 Enable FEFD on each interface fefd {disable | interval |
mode}
INTERFACE
FTOS(conf-if-gi-1/0)#show config
!
interface GigabitEthernet 1/0
no ip address
switchport
fefd mode normal
no shutdown
FTOS(conf-if-gi-1/0)#do show fefd | grep 1/0
Gi 1/0 Normal 3 Unknown
FTOS#debug fefd events
FTOS#config
FTOS(conf)#int gi 1/0
FTOS(conf-if-gi-1/0)#shutdown
2w1d22h: %RPM0-P:CP %IFMGR-5-ASTATE_DN: Changed interface Admin state to down: Gi 1/0
FTOS(conf-if-gi-1/0)#2w1d22h : FEFD state on Gi 1/0 changed from ANY to Unknown
2w1d22h: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Gi 1/0
2w1d22h: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Gi 4/0
2w1d22h: %RPM0-P:CP %IFMGR-5-INACTIVE: Changed Vlan interface state to inactive: Vl 1
2w1d22h : FEFD state on Gi 4/0 changed from Bi-directional to Unknown