Config-sync over management interface – while not a best practice – can be a handy thing to have, whether that is because of a lack of interfaces, switch capacity or other reason.
This has cropped up for me in a refresh / migration project where interfaces were changed out for fibre and didn’t come up immediately. This allowed us to sync the machines and configure failover before attending to the interface issue ..
Best practices for f5 High Availability configuration can be found here.
The management interface will not show up by default under the config-sync tab:
this has to be enabled using the following commands:
tmsh modify sys db configsync.allowmanagement value enable
tmsh save sys config
Refresh the page and we can now choose to run the management interface: