Deployment Guide

As shown in the previous illustration, interface 1/1/1/1 is a backup interface for 1/1/2/1, and 1/1/3/1 is in the Down state. If
1/1/1/1 fails, 1/1/2/1 transitions to the Up state, which makes the backup link active. A message similar to the following message
appears whenever you configure a backup port.
02:28:04: %RPM0-P:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on Te 1/1/1/1
and Te 1/1/1/2
02:28:04: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 1/1/1/2
02:28:04: %RPM0-P:CP %IFMGR-5-STATE_ACT_STBY: Changed interface state to standby: te
1/1/1/2
Example of Configuring Redundant Layer 2 Pairs
DellEMC(conf-if-range-te-1/1/1/1-1/1/1/2)#switchport backup interface TenGigabitEthernet
1/1/1/2
DellEMC(conf-if-range-te-1/1/1/1-1/1/1/2)#show config
!
interface TenGigabitEthernet 1/1/1/1
no ip address
switchport
switchport backup interface TenGigabitEthernet 1/1/1/2
no shutdown
!
interface TenGigabitEthernet 1/1/1/2
no ip address
switchport
no shutdown
DellEMC(conf-if-range-te-1/1/1/1-1/1/1/2)#
DellEMC(conf-if-range-te-1/1/1/1-1/1/1/2)#do show ip int brief | find 1/1/1/2
TenGigabitEthernet 1/1/1/1 unassigned YES Manual up up
TenGigabitEthernet 1/1/1/1 unassigned NO Manual up down
[output omitted]
DellEMC(conf-if-range-te-1/1/1/1-1/1/1/2)#interface TenGigabitEthernet 1/1/1/1
DellEMC(conf-if-te-1/1/1/2)#shutdown
00:24:53: %RPM0-P:CP %IFMGR-5-ASTATE_DN: Changed interface Admin state to down: Te
1/1/1/2
DellEMC(conf-if-te-1/1/1/1)#00:24:55: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface
state to
down: Te 1/1/1/200:24:55: %RPM0-P:CP %IFMGR-5-INACTIVE: Changed Vlan interface state to
inactive: Vl 1
00:24:55: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed interface state to up: Te 1/1/1/1
00:24:55: %RPM0-P:CP %IFMGR-5-ACTIVE: Changed Vlan interface state to active: Vl 1
00:24:55: %RPM0-P:CP %IFMGR-5-STATE_STBY_ACT: Changed interface state from standby to active:
Te 1/1/1/2
DellEMC(conf-if-te-1/1/1/1)#do show ip int brief | find 1/1/1/2
TenGigabitEthernet 1/1/1/1 unassigned NO Manual administratively down down
TenGigabitEthernet 1/1/1/2 unassigned YES Manual up up
[output omitted]
Example of Configuring Redundant Pairs on a Port-Channel
DellEMC#show interfaces port-channel brief
Codes: L - LACP Port-channel
LAG Mode Status Uptime Ports
1 L2 up 00:08:33 Te 1/1/1/1 (Up)
2 L2 up 00:00:02 Te 1/1/1/2 (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
Layer 2
501