If you have not yet created a Certificate Signing Request (CSR) and ordered your certificate, see:
F5 BIG-IP : Generating a CSR for Issuance of an SSL Certificate
Installing the SSL Certificate
Click "Open" and then "Import."
Your SSL Certificate file is now installed.
Enabling your Intermediate Certificate
Browse to the DigiCertCA.crt file that you received from DigiCert, click "Open," and then "Import."
Your intermediate certificate should now be imported.
Configure your server for SSL
Under the "Chain" section, browse to the "DigiCertCA" file that you imported in the previous step, then save and exit the configuration
Your SSL Certificate has now been installed and enabled for use on your server.
Inside your DigiCert account, you can download your certificate files. You need the Primary (your_domain_name.crt) and Intermediate (DigiCertCA.crt) certificate files. You will need both files for proper installation on your BIG-IP device. You do not need the TrustedRoot.crt file
Move your Primary and Intermediate Certificates to the BIG-IP device.
The Primary (your_domain_name.crt) and Intermediate (intermediate-ca.crt) certificate files can be moved to the BIG-IP box using FTP.
Rename and move the certificate files.
Rename your Primary certificate from your_domain_name.crt to your.domain.name.crt and copy it to the /config/bigconfig/ssl.crt/ folder.
Copy the intermediate-ca.crt to the /config/bigconfig/ssl.crt/ folder.
Restart the Proxy.
# bigpipe proxy <IP Address>:443 disable
# bigpipe proxy <IP Address>:443 enable
The Certificate is now installed.