Im having problems getting the Discard action to work ( or even to be picked up from the Policy Agent!)

I have

IpFilterRule ColinInICMP 
{ 
  IpSourceAddr 10.1.0.2 
  IpDestAddr   10.1.1.2 
  IpGenericFilterActionRef icmpreply 
 IpService 
 { 
                                     
    Protocol icmp 
    Direction inbound 
    Routing local 
 } 

IpGenericFilterAction icmpreply 
{ 
  IpFilterAction deny    DiscardAction  ICMP 
  IpFilterLogging yes 
} 

This is giving me DiscardAction Silent.

If I change it to

IpFilterAction deny    DiscardActionzz ICMPzzzzz

It is processed with no errors.   It looks like the DiscardAction... is ignored.   I'm on z/OS 2.4. 

Am I missing something?

Colin

Your IpGenericFilterAction should be configured like this with DiscardAction ICMP on a separate line. 
IpGenericFilterAction icmpreply 
{ 
  IpFilterAction deny

  DiscardAction  ICMP 
  IpFilterLogging yes 
} 

The general parsing syntax for policy agent is to have 1 attribute and value per line. Any remaining information on the line is treated as a comment and ignored. So DiscardAction ICMP was treated as a comment and ignored as you had determined.

The following section covers general policy agent syntax.
https://www.ibm.com/docs/en/zos/2.4.0?topic=files-general-syntax-rules-policy-agent

There are exceptions among the various policy types but they should be noted.