Administrator Guide

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 tengigabitethernet 0/2
Apr 9 00:16:29: %STKUNIT0-M:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on
Po 1 and Te 0/2
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 specified time interval.
You can enable FEFD globally or locally on an interface basis. Disabling the global FEFD configuration does not disable the
interface configuration.
Figure 75. Configuring 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 specified 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.
540
Layer 2