Reference Guide

Example of Configuring Redundant Pairs on a Port-Channel (S4820T)
FTOS#show interfaces port-channel brief
Codes: L - LACP Port-channel
LAG Mode Status Uptime Ports
1 L2 up 00:08:33 Te 0/0 (Up)
2 L2 up 00:00:02 Te 0/1 (Up)
FTOS#configure
FTOS(conf)#interface port-channel 1
FTOS(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
FTOS(conf-if-po-1)#
FTOS#
FTOS#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
FTOS#
FTOS(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
FTOS(conf-if-po-1)#
Far-End Failure Detection
Far-end failure detection (FEFD) is supported on the S4820T platform.
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.
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