Users Guide

Remaining Restore time : 80 seconds
Peer-Routing : Disabled
9. Change the boot partition to standby on VLT-Peer2.
VLT-Peer2# boot system standby
10. Save the configuration to startup-configuration. Optionally obtain a backup of the startup configuration in EXEC mode on
VLT-Peer2.
VLT-Peer2# write memory
VLT-Peer2# copy config://startup.xml config://<backup file name>
11. Reload VLT-Peer2.
VLT-Peer2# reload
12. Wait for VLT-Peer2 to come up. VLT adjacency is established. VLT-Peer2 becomes the secondary node. Wait until VLT-
Peer2 starts to forward traffic after the delay-restore timer expires. To check the delay-restore timer value, enter the show
vlt domain-id command.
VLT-Peer2# show vlt 100
Domain ID : 100
Unit ID : 2
Role : secondary
Version : 2.3
Local System MAC address : 0c:33:d1:73:ee:00
Role priority : 32768
VLT MAC address : 0c:33:d1:e7:5e:00
IP address : fda5:74c8:b79e:1::2
Delay-Restore timer : 90 seconds
Remaining Restore time : 80 seconds
Peer-Routing : Disabled
When the delay-restore timer expires, the system generates a syslog message similar to the following one:
<165>1 2021-02-24T02:29:29.296791+00:00 host1 dn_alm 881 - - Node.1-Unit.1:PRI
[event], Dell EMC (OS10) %VLT_DELAY_RESTORE_COMPLETE: VLT delay restore timer stop
Upgrade on VLT peer nodes is now complete. Both the nodes actively forward traffic. After upgrade, VLT-Peer1 is the primary
node and VLT-Peer2 is the secondary node.
VLT upgrade with minimal loss for upgrades from 10.5.0.5 or earlier
to 10.5.1.9 or later releases
NOTE:
The default X.509v3 certificates used for VLT convergence expire on July 27, 2021. See Dell EMC SmartFabric
OS10 certificate expiration and recommended action for additional information before you start the VLT upgrade procedure.
NOTE: This procedure is applicable only when upgrading to 10.5.1.9 or future releases from 10.5.0.5 or earlier OS10
releases. This VLT upgrade procedure is not applicable when upgrading to 10.5.2.6 or future releases from 10.5.0.6 or later
releases. You can directly upgrade VLT nodes from 10.5.0.6 or later release to 10.5.2.6 or future release using the regular
VLT upgrade procedure.
1. Upgrade one VLT peer (VLT-Peer1) running a 10.5.0.x or 10.4.3.x release image to 10.5.0.9 or later, using the standard image
upgrade procedure. Reboot the switch with the newly installed image. Wait for VLT-Peer1 to forward traffic after the delay
restore timer stops.
2. Upgrade the other VLT peer (VLT-Peer2), running a 10.5.0.x or 10.4.3.x release image to 10.5.0.9 or later, using the standard
image upgrade procedure. Reboot the switch with the newly installed image. Wait for VLT-Peer2 to forward traffic after the
delay restore timer stops.
3. Upgrade one VLT peer (VLT-Peer1) to 10.5.1.9 or later/10.5.2.6 or later using the standard image upgrade procedure. Reboot
the switch with the newly installed image. Wait for VLT-Peer1 to forward traffic after the delay restore timer stops.
4. Upgrade the other VLT peer (VLT-Peer2) to 10.5.1.9 or later/10.5.2.6 or later using the standard image upgrade procedure.
Reboot the switch with the newly installed image.
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Upgrading OS10 software