anchor.diff:     ) NEWLINE
   ;
   
  -ip_address_stanza
  +ip_address_hsrpc_stanza
   :
      IP ip = IP_ADDRESS NEWLINE
   ;
  
positive.code: 
  hsrpc_stanza
  :
     preempt_stanza
     | priority_stanza
     | ip_address_stanza
  ;
  
  if_stanza
  
negative.code:    SWITCHPORT TRUNK NATIVE VLAN vlan = DEC NEWLINE
  ;
  
  track_hsrpc_stanza
  :
     TRACK ~NEWLINE* NEWLINE
  ;
  
  vrf_forwarding_if_stanza
  :
     VRF FORWARDING name = ~NEWLINE NEWLINE
  