Concept Guide
1 L2 up 00:08:33 Gi 1/1 (Up)
2 L2 up 00:00:02 Gi 2/1 (Up)
DellEMC#configure
DellEMC(conf)#interface port-channel 1
DellEMC(conf-if-po-1)#switchport backup interface port-channel 2
Apr 9 00:15:13: %STKUNIT0-M:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on Po 1
and Po 2
Apr 9 00:15:13: %STKUNIT0-M:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Po 2
Apr 9 00:15:13: %STKUNIT0-M:CP %IFMGR-5-STATE_ACT_STBY: Changed interface state to standby: Po 2
DellEMC(conf-if-po-1)#
DellEMC#
DellEMC#show interfaces switchport backup
Interface Status Paired Interface Status
Port-channel 1 Active Port-chato mannel 2 Standby
Port-channel 2 Standby Port-channel 1 Active
DellEMC#
DellEMC(conf-if-po-1)#switchport backup interface gigabitethernet 1/2
Apr 9 00:16:29: %STKUNIT0-M:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on Po 1
and Gi 1/2
DellEMC(conf-if-po-1)#
Far-End Failure Detection
Far-end failure detection (FEFD) is a protocol that senses remote data link errors in a network. FEFD responds by sending a unidirectional
report that triggers an echoed response after a specied time interval. You can enable FEFD globally or locally on an interface basis.
Disabling the global FEFD conguration does not disable the interface conguration.
Figure 64. Conguring Far-End Failure Detection
The report consists of several packets in SNAP format that are sent to the nearest known MAC address.
472
Layer 2