4. If the FEFD enabled system is configured to use FEFD in Normal mode and neighboring echoes arenot received after three intervals, (you can set each interval can be set between 3 and 300 seconds)the state changes to unknown.5. If the FEFD system has been set to Aggressive mode and neighboring echoes are not received afterthree intervals, the state changes to Err-disabled. You must manually reset all interfaces in the Err-disabled state using the fefd reset [interface] command in EXEC privilege mode (it can bedone globally or one interface at a time) before the FEFD enabled system can become operationalagain.Table 22. State Change When Configuring FEFDLocalEvent Mode Local State RemoteState LocalAdminStatusLocalProtocolStatusRemoteAdminStatusRemoteProtocolStatusShutdown Normal AdminShutdownUnknown Down Down Up DownShutdown Aggressive AdminShutdownErr-disabledUp Down Up DownFEFDenableNormal Bi-directionalBi-directionalUp Up Up UpFEFDenableAggressive Bi-directionalBi-directionalUp Up Up UpFEFD +FEFDdisableNormal LocallydisabledUnknown Up Down Up DownFEFD +FEFDdisableAggressive LocallydisabledErr-disabledUp Down Up DownLink Failure Normal Unknown Unknown Up Down Up DownLink Failure Aggressive Err-disabledErr-disabledUp Down Up DownImportant Points to Remember• FEFD enabled ports are subject to an 8 to 10 second delay during an RPM failover before becomingoperational.• You can enable FEFD globally or on a per-interface basis. Interface FEFD configurations overrideglobal FEFD configurations.• Dell Networking OS supports FEFD on physical Ethernet interfaces only, excluding the managementinterface.Configuring FEFDYou can configure FEFD for all interfaces from CONFIGURATION mode, or on individual interfaces fromINTERFACE mode.To enable FEFD globally on all interfaces, use the following command.• Enable FEFD globally on all interfaces.CONFIGURATION modefefd-globalLayer 2 457
