diff --git a/pipelines/fabric/impl/src/main/resources/include/define.p4 b/pipelines/fabric/impl/src/main/resources/include/define.p4
index 8501516..bfb7b44 100644
--- a/pipelines/fabric/impl/src/main/resources/include/define.p4
+++ b/pipelines/fabric/impl/src/main/resources/include/define.p4
@@ -97,17 +97,28 @@
 
 // SPGW types
 typedef bit<2> direction_t;
+typedef bit<8> spgw_interface_t;
 typedef bit pcc_gate_status_t;
 typedef bit<32> sdf_rule_id_t;
 typedef bit<32> pcc_rule_id_t;
 typedef bit<32> far_id_t;
-typedef bit<32> ctr_id_t;
+typedef bit<32> pdr_ctr_id_t;
 typedef bit<32> teid_t;
 
-// spgw.p4 expects uplink packets with IP dst on this subnet
-// 140.0.0.0/8
-const ipv4_addr_t S1U_SGW_PREFIX = 2348810240;
+const spgw_interface_t SPGW_IFACE_UNKNOWN = 8w0;
+const spgw_interface_t SPGW_IFACE_ACCESS = 8w1;
+const spgw_interface_t SPGW_IFACE_CORE = 8w2;
+const direction_t SPGW_DIR_UNKNOWN = 2w0;
+const direction_t SPGW_DIR_UPLINK = 2w1;
+const direction_t SPGW_DIR_DOWNLINK = 2w2;
+
+#ifndef S1U_SGW_PREFIX
+// By default spgw.p4 expects uplink packets with IP dst matching 140.0.0.0/8
+// FIXME: refactor pipeline to remove dependency on this value or allow setting it at runtime
+//  (e.g. via parser value sets)
+#define S1U_SGW_PREFIX (8w140++8w0++8w0++8w0)
 #define S1U_SGW_PREFIX_LEN 8
+#endif
 
 const bit<16> ETHERTYPE_QINQ = 0x88A8;
 const bit<16> ETHERTYPE_QINQ_NON_STD = 0x9100;
@@ -144,13 +155,7 @@
 const bit<8> DEFAULT_MPLS_TTL = 64;
 const bit<8> DEFAULT_IPV4_TTL = 64;
 
-const sdf_rule_id_t DEFAULT_SDF_RULE_ID = 0;
-const pcc_rule_id_t DEFAULT_PCC_RULE_ID = 0;
-const direction_t SPGW_DIR_UNKNOWN = 2w0;
-const direction_t SPGW_DIR_UPLINK = 2w1;
-const direction_t SPGW_DIR_DOWNLINK = 2w2;
-const pcc_gate_status_t PCC_GATE_OPEN = 1w0;
-const pcc_gate_status_t PCC_GATE_CLOSED = 1w1;
+
 
 /* indicate INT at LSB of DSCP */
 const bit<6> INT_DSCP = 0x1;