An organization is planning to upgrade a BIG-IP system from 16.

BIG-IP licensing information, including the Service Check Date , is stored in the file:

/config/bigip.license

This file contains all license attributes downloaded from the F5 licensing server, including:

License key

Licensed modules

Useful life date

Service check date

The Service Check Date determines whether the system is eligible for upgrades to specific TMOS versions. When reviewing upgrade readiness, administrators extract this value directly from the license file with:

grep " Service check date " /config/bigip.license

Why the other options are incorrect:

/config/bigip.conf stores BIG-IP configuration objects, not license metadata.

/config/svc_chk_date.dat is not a valid file in the licensing system; it does not contain license parameters.

/config/BigDB.dat stores internal database values, not licensing attributes.

Thus, only the bigip.license file contains the correct licensing information required for verifying upgrade eligibility.