big-ip imish/zebos bgp config sync

hi, i'm pretty new to big-ip. trying to configure bgp, but wonder how it is sync'd between the trusted Devices. do i need to redo exact imish/zebos config on standby F5? i tried to 'sync device-to-group' from the web but when i entered imsh, the configuration is not there. if you can shed some lights what i'm missing here would be greatly appreciated.

thanks! SZ