2 L2 up 00:00:02 Te 2/1 (Up)Dell#configureDell(conf)#interface port-channel 1Dell(conf-if-po-1)#switchport backup interface port-channel 2Apr 9 00:15:13: %STKUNIT0-M:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on Po1 and Po 2Apr 9 00:15:13: %STKUNIT0-M:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Po 2Apr 9 00:15:13: %STKUNIT0-M:CP %IFMGR-5-STATE_ACT_STBY: Changed interface state to standby:Po 2Dell(conf-if-po-1)#Dell#Dell#show interfaces switchport backupInterface Status Paired Interface StatusPort-channel 1 Active Port-chato mannel 2 StandbyPort-channel 2 Standby Port-channel 1 ActiveDell#Dell(conf-if-po-1)#switchport backup interface tengigabitethernet 1/2Apr 9 00:16:29: %STKUNIT0-M:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on Po1 and Te 1/2Dell(conf-if-po-1)#Far-End Failure DetectionFar-end failure detection (FEFD) is a protocol that senses remote data link errors in a network. FEFD responds by sending aunidirectional report that triggers an echoed response after a specified time interval. You can enable FEFD globally or locally on aninterface basis. Disabling the global FEFD configuration does not disable the interface configuration.Figure 76. Configuring Far-End Failure DetectionThe report consists of several packets in SNAP format that are sent to the nearest known MAC address.Layer 2 491
