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
Dell(conf-if-po-1)#
Dell#
Dell#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
Dell#
Dell(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
Dell(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 specied time interval. You can enable FEFD globally or locally on an interface basis.
Disabling the global FEFD conguration does not disable the interface conguration.
Figure 62. Conguring Far-End Failure Detection
The report consists of several packets in SNAP format that are sent to the nearest known MAC address.
In the event of a far-end failure, the device stops receiving frames and, after the specied time interval, assumes that the far-end is not
available. The connecting line protocol is brought down so that upper layer protocols can detect the neighbor unavailability faster.
444
Layer 2
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