Upgrading both switches at the same time

Prerequisites

Ensure there is a scheduled maintenance window. There will be a disruption of service until the upgrade is complete and VSX is configured on the switches. It is advisable to have a support engineer from HPE available during this procedure.
If loop protect is enabled, enter the show loop-protect command for verifying that the action on loop detection has a value of TX disable on the VSX interface. If the setting has a different value, reset the value to TX disable by entering the loop-protect action tx-disable command:
```
switch(config)# interface lag 2 multi-chassis
switch(config-if)# loop-protect action tx-disable
```
Back up the current software to the secondary image bank. Run the show version command. If the Active Image is primary, copy the primary image to the secondary image bank:
```
switch# copy primary secondary
```
If the current image bank is secondary, the current image, such as for 10.01, is already in the secondary bank.
Enter the following command to save the running configuration to the startup configuration:
```
switch# write memory
Success
```

(Optional) Perform an external backup by entering :

switch# copy running-config sftp://<USERNAME>@<IP>/<FILENAME> vrf mgmt

Check the status of the show vsx brief command and validate the ISL is in-sync and the keepalive is established.
Check the output of the show lacp interfaces multi-chassis command. Write down which LACP interfaces are in a forwarding state of up.

Procedure

Ensure there is a maintenance window as both switches will no longer be forwarding network traffic.
Copy the software from this release onto both switches by using TFTP, SFTP, or USB:
```
switch# copy sftp://<USERNAME>@<IP>/<FILENAME> primary vrf mgmt
```
Boot each switch to the 10.03 software release:
```
switch# boot system primary
```
Validate on both switches that the ISL is In-Sync by running the show vsx brief command on both switches. Verify in the output of the command that the keepalive state is Keepalive-Established.
Validate on both switches that the downstream LACP links are all forwarding correctly by entering the show lacp interfaces command.
Save the running configuration to the startup configuration:
```
switch# write memory
Success
```