Deployment Guide

Table Of Contents
Important Points about Configuring Redundant Pairs
You may not configure any interface to be a backup for more than one interface, no interface can have more than one
backup, and a backup interface may not have a backup interface.
The active or backup interface can be a LAG, but it cannot be a member port of a LAG.
The active and standby do not have to be of the same type (1G, 10G, and so on).
You may not enable any Layer 2 protocol on any interface of a redundant pair or to ports connected to them.
As shown in the previous illustration, interface 1/11/1 is a backup interface for 1/11/2, and 1/11/2 is in the Down state. If 1/11/1
fails, 1/11/2 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 1/1/2/1
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
02:28:04: %RPM0-P:CP %IFMGR-5-L2BKUP_WARN: Do not run any Layer2 protocols on Te 1/11/1
and Te 1/11/1
02:28:04: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 1/12/1
02:28:04: %RPM0-P:CP %IFMGR-5-STATE_ACT_STBY: Changed interface state to standby: te
1/13/1
Example of Configuring Redundant Layer 2 Pairs
DellEMC(conf-if-range-te-1/11/1-1/11/2)#switchport backup interface TenGigabitEthernet
1/11/1
DellEMC(conf-if-range-te-1/11/1-1/11/2)#show config
!
interface TenGigabitEthernet 1/11/1
no ip address
switchport
switchport backup interface TenGigabitEthernet 1/11/2
no shutdown
!
interface TenGigabitEthernet 1/11/2
no ip address
switchport
no shutdown
DellEMC(conf-if-range-te-1/11/1-1/11/2)#
DellEMC(conf-if-range-te-1/11/1-1/11/2)#do show ip int brief | find 1/11/1
TenGigabitEthernet 1/11/1 unassigned YES Manual up up
TenGigabitEthernet 1/11/2 unassigned NO Manual up down
[output omitted]
DellEMC(conf-if-range-te-1/11/1-1/11/2)#interface TenGigabitEthernet 1/11/1
DellEMC(conf-if-te-1/11/1)#shutdown
00:24:53: %RPM0-P:CP %IFMGR-5-ASTATE_DN: Changed interface Admin state to down: Te 1/11/1
DellEMC(conf-if-te-1/11/1)#00:24:55: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface
state to
down: Te 1/11/1
00:24:55: %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 1/11/2
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 1/11/2
DellEMC(conf-if-te-1/11/1)#do show ip int brief | find 1/11/1
TenGigabitEthernet 1/11/1 unassigned NO Manual administratively down down
TenGigabitEthernet 1/11/2 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
484
Layer 2