Logging information - where to find

check out this link: https://devcentral.f5.com/questions/how-to-see-current-traffic-logs-on-ltm

If you want to look at current logs on the Big-IP, you can run

tailf /var/log/ltm

You can also check these logs locally on the Big-IP by navigating to

System->Logs->Local Traffic

If you need to download the logs, you can do by using an FTP client something like WinSCP to login to your appliance and navigate to directory /var/log/ and look for ltm file(s).

Hope this helps!