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Important Points about Conguring Redundant Pairs
• You may not congure 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 may not be a member 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.
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 Conguring 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 Conguring 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 (Up)
2 L2 up 00:00:02 Te 1/2/1 (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#
Layer 2
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