Attached is the dictionary file to be imported in ISE at ISE admin web UI > Policy > Policy Elements > Dictionaries > System > Radius > RADIUS Vendors.
Per SOL14324 - Using F5 vendor-specific attributes with RADIUS authentication (11.x -12.x),
To use the F5 VSAs, you must define the attributes on the RADIUS server.
VENDOR f5 3375
BEGIN-VENDOR f5
ATTRIBUTE F5-LTM-User-Role 1 integer
ATTRIBUTE F5-LTM-User-Role-Universal 2 integer # enable/disable
ATTRIBUTE F5-LTM-User-Partition 3 string
ATTRIBUTE F5-LTM-User-Console 4 integer # enable/disable
ATTRIBUTE F5-LTM-User-Shell 5 string # supported values are disable, tmsh and bpsh
ATTRIBUTE F5-LTM-User-Context-1 10 integer
ATTRIBUTE F5-LTM-User-Context-2 11 integer
ATTRIBUTE F5-LTM-User-Info-1 12 string
ATTRIBUTE F5-LTM-User-Info-2 13 string
ATTRIBUTE F5-LTM-Audit-Msg 14 string
VALUE F5-LTM-User-Role Administrator 0
VALUE F5-LTM-User-Role Resource-Admin 20
VALUE F5-LTM-User-Role User-Manager 40
VALUE F5-LTM-User-Role Auditor 80
VALUE F5-LTM-User-Role Manager 100
VALUE F5-LTM-User-Role App-Editor 300
VALUE F5-LTM-User-Role Advanced-Operator 350
VALUE F5-LTM-User-Role Operator 400
VALUE F5-LTM-User-Role Firewall-Manager 450
VALUE F5-LTM-User-Role Fraud-Protection-Manager 480
VALUE F5-LTM-User-Role Certificate-Manager 500
VALUE F5-LTM-User-Role IRule-Manager 510
VALUE F5-LTM-User-Role Guest 700
VALUE F5-LTM-User-Role Web-Application-Security-Administrator 800
VALUE F5-LTM-User-Role Web-Application-Security-Editor 810
VALUE F5-LTM-User-Role Acceleration-Policy-Editor 850
VALUE F5-LTM-User-Role No-Access 900
VALUE F5-LTM-User-Role-Universal Disabled 0
VALUE F5-LTM-User-Role-Universal Enabled 1
VALUE F5-LTM-User-Console Disabled 0
VALUE F5-LTM-User-Console Enabled 1
END-VENDOR f5