diff --git a/doc/gb_stack_ip.dot b/doc/gb_stack_ip.dot
new file mode 100644
index 0000000..0c54c78
--- /dev/null
+++ b/doc/gb_stack_ip.dot
@@ -0,0 +1,43 @@
+digraph G {
+	rankdir = LR;
+	label = "Gb protocol stack with NS over IP";
+
+	"BSSGP_BVC_CT" [
+		shape = "record"
+		label = "<f0> BSSGP_BVC_CT | <BSSGP_SP> BSSGP_SP | <BSSGP_SP_SIG> BSSGP_SP_SIG | <BSSGP_PROC> BSSGP_PROC | <GLOBAL> GLOBAL | <MGMT> MGMT | <BVC> BVC"
+	]
+
+	"BSSGP_CT" [
+		shape = "record"
+		label = "<f0> BSSGP_CT | <PROC> PROC | <GLOBAL> GLOBAL | <RIM> RIM | <MGMT> MGMT | <BVC> BVC | <BSCP> BSCP"
+	]
+
+	"NS_CT" [
+		shape = "record"
+		label = "<f0> NS_CT | <NS_SP> NS_SP | <NSVC> NSVC | <NS_CTRL> NS_CTRL | <NSIP_PROC> NSIP_PROC"
+	]
+
+	"NSVC_CT" [
+		shape = "record"
+		label = "<f0> NSVC_CT | <NS_SP> NS_SP | <NSCP> NSCP"
+	]
+
+	"NS_Provider_IPL4_CT" [
+		shape = "record"
+		label = "<f0> NS_Provider_IPL4_CT | <NSE> NSE | <NSVC> NSVC | <IPL4> IPL4 | <PROC> PROC"
+	]
+
+	"system" [
+		shape = "record"
+		label = "<f0> system | <IPL4> IPL4"
+	]
+
+	"BSSGP_BVC_CT":BVC -> "BSSGP_CT":BVC
+	"BSSGP_CT":BSCP -> "NS_CT":NS_SP
+
+	"NS_CT":NSVC -> "NSVC_CT":NS_SP
+	"NS_CT":NSIP_PROC -> "NS_Provider_IPL4_CT":PROC
+	"NSVC_CT":NSCP -> "NS_Provider_IPL4_CT":NSVC
+	"NS_Provider_IPL4_CT":IPL4 -> "system":IPL4
+
+}