Important Points About Configuring Redundant Pairs - Dell Z9500 Configuration Manual

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 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.
As shown in the above illustration, interface 3/41 is a backup interface for 3/42, and 3/42 is in the Down state. If 3/41 fails, 3/42
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 3/41 and Te
3/42
02:28:04: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 3/42
02:28:04: %RPM0-P:CP %IFMGR-5-STATE_ACT_STBY: Changed interface state to standby: te 3/42
Example of Configuring Redundant Layer 2 Pairs
Dell(conf-if-range-te-3/41-42)#switchport backup interface TenGigabitEthernet 3/42
Dell(conf-if-range-te-3/41-42)#show config
!
interface TenGigabitEthernet 3/41
no ip address
switchport
switchport backup interface TenGigabitEthernet 3/42
no shutdown
!
interface TenGigabitEthernet 3/42
no ip address
switchport
no shutdown
Dell(conf-if-range-te-3/41-42)#
Dell(conf-if-range-te-3/41-42)#do show ip int brief | find 3/41
TenGigabitEthernet 3/41
TenGigabitEthernet 3/42
[output omitted]
Dell(conf-if-range-te-3/41-42)#interface tengig 3/41
Dell(conf-if-te-3/41)#shutdown
00:24:53: %RPM0-P:CP %IFMGR-5-ASTATE_DN: Changed interface Admin state to down: Te 3/41
Dell(conf-if-te-3/41)#00:24:55: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to
down: Te 3/41
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 3/42
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 3/42
Dell(conf-if-te-3/41)#do show ip int brief | find 3/41
TenGigabitEthernet 3/41
TenGigabitEthernet 3/42
[output omitted]
Example of Configuring Redundant Pairs on a Port-Channel
Dell#show interfaces port-channel brief
Codes: L - LACP Port-channel
LAG Mode Status
1 L2 up
2 L2 up
Dell#configure
Dell(conf)#interface port-channel 1
Dell(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
unassigned
unassigned
unassigned
unassigned
Uptime Ports
00:08:33 Te 1/1 (Up)
00:00:02 Te 2/1 (Up)
YES Manual up
NO Manual up
NO Manual administratively down down
YES Manual up
up
down
up
Layer 2 505