+/*VALID Tunnel ID*/
+#define MIN_TEID 1 /*[Spec 29.281,Sec 5.1]: All Zero TEIDs are never assigned for setting up GTP-U Tunnel*/
+#define MAX_TEID 10 /*[Spec 29.281]: Max limit is not mentioned but as per GTP-U Header Format, TEID occupies 4 octets */