Q. Which all Classic policy based features and functionalities are being removed from Citrix ADC?

Answer: All the features and functionalities mentioned in “Feature Description” column in Table 1 below are being removed from Citrix ADC. These features were deprecated in 12.0 builds and will be removed in a future release (targeted NetScaler GA release in Q2 2020).

Citrix recommends that all Citrix ADC customers take steps to switch from the following deprecated features & functionalities to corresponding feature replacements as suggested in Table 1. 
 
Table 1. Classic policy based features & functionalities deprecated with feature replacement.
 

Feature Description	Deprecation Initiated	Feature Replacement
Citrix ADC features and its functionalities: - SureConnect (SC) Priority Queuing (PQ) HTTP Denial of Service Protection (HDoSP)	12.0.41.16	AppQoE
SPDY	12.0.41.16	HTTP/2
HTMLInjection	12.0.41.16	AppFlow with Client-Side Measurements
Filter	12.0.41.16	Responder (for ERRORCODE, or DROP or RESET on the request side), Rewrite (for ADD or CORRUPT, or DROP or RESET on the response side), or Content Switching (for FORWARD).
Q and S prefixes in Advanced expressions	12.0.41.16	HTTP.REQ and HTTP.RES
Pattern function in Rewrite action	12.0.56.20	-Search Rewrite action parameter
Classic Named (policy) expression	12.0.56.20	Advanced policy expression
Application Firewall Classic policy	12.0.41.16	Application Firewall Advanced policy
Compression Classic policy	12.0.41.16	Compression Advanced policy
Classic Cache Redirection policy	12.0.41.16	Advanced Cache Redirection policy
Content Switching Classic policy	12.0.41.16	Content Switching Advanced policy
SSL Classic policy	12.0.41.16	SSL Advanced policy
Classic Audit SYSLOG policy	12.0.41.16	Advanced Audit SYSLOG policy
Classic Audit NSLOG policy	12.0.41.16	Advanced Audit NSLOG policy
Classic AAA Pre-authentication policy	12.0.56.20	Advanced AAA Pre-authentication policy
Authentication Local policy RADIUS Authentication policy LDAP Authentication policy Authentication Certification (cert) policy TACACS Authentication policy Authentication Negotiate policy SAML Authentication policy Delegation Forms Authentication (DFA) policy Web Authentication policy	12.0.56.20	Advanced Authentication policy (“add Authentication policy”)
Classic Authorization policy	12.0.41.16	Advanced Authorization policy
Classic Traffic Management Session policy	12.0.41.16	Advanced Traffic Management Session policy
Classic Tunnel Traffic policy	12.0.56.20	Advanced Tunnel Traffic policy
Classic VPN Traffic policy	12.0.41.16	Advanced VPN Traffic policy
Classic VPN Session policy	12.0.41.16	Advanced VPN Session policy
Trace Classic expression	12.0.41.16	Trace Advanced expression
SYS.EVAL_CLASSIC_EXPR Classic function	12.0.41.16	Converting function to Advanced, replacing SYS.EVAL_CLASSIC_EXPR

Q. How do I convert deprecated Classic policy based features & functionalities to Advanced policy based features and functionalities?
Answer: You can use the Citrix ADC proprietary nspepi tool to convert commands, expressions, and configurations. nspepi tool helps to convert all the Classic expressions in the Citrix ADC configuration to the Advanced policy. More details about nspepi tool is available at: https://docs.netscaler.com/en-us/citrix-adc/current-release/appexpert/policies-and-expressions/introduction-to-policies-and-exp/converting-policy-expressions-nspepi-tool.html
 
Q. From which Citrix ADC release will Classic policy based features and functionalities not be supported?
Answer: Citrix ADC GA,2020 releases onwards.
 
Q.  What actions do I need to take when I will be moving from a build where a feature mentioned in Table 1 is supported (example, Citrix ADC 11.0) to a build where the feature is not supported (example, Citrix ADC 13.1)?
Answer: Citrix recommends to replace the Classic policy based features and functionalities with the replacement features and functionalities mentioned in Table 1 above before upgrading to 13.1.
 
Q. What actions do I need to take when I will be moving from a build where a feature mentioned in Table 1 is deprecated (example, Citrix ADC 12.0.56) to where a build where the feature is not supported (example, Citrix ADC 13.1)?
Answer: Citrix recommends to replace the Classic policy based features and functionalities with the replacement features and functionalities mentioned in Table 1 above before upgrading to 13.1.
 
Q. I am using a build on which a feature mentioned in Table 1 is supported and have no immediate plans of upgrade, how long will I have support for deprecated feature?
Answer: Citrix will support the policy based features and functionalities as per current software support guidelines. For more details please refer to : https://www.citrix.co.in/support/product-lifecycle/product-matrix.html
 
Q. What is recommended when I am adding a new deprecated configuration or modifying existing deprecated configs on the builds where Classic policy expressions are deprecated (e.g. 12.0.56)?
Answer: Citrix recommends not to use deprecated policies and expressions. Please use the above Table 1 for finding the replacement features.
 
Q. Do I have to re-boot the Citrix ADC instance after converting configuration file?
Answer: Yes, you have to reboot the NetScaler instance after successful conversion of ns.config file.