Hello I am pretty new to managing SRX 340 and 300. I was assigned by my manager to upgrade the SRX 300/340 firmware. I have a couple questions on upgrading.
Do I need to upgrade the main office first (SRX 340), then upgrade the remote branch (SRX 300)?
Or can I upgrade the remote branch first? Also, If i upgrade the remote branch SRX will the site to site vpn tunnel still work even though the main office SRX is still on the old firmware.
Can anyone please help me on where to start and also point me to any documentation on best practice for this?