diff --git a/openbsc/include/openbsc/gb_proxy.h b/openbsc/include/openbsc/gb_proxy.h
new file mode 100644
index 0000000..8194d2a
--- /dev/null
+++ b/openbsc/include/openbsc/gb_proxy.h
@@ -0,0 +1,37 @@
+#ifndef _GB_PROXY_H
+#define _GB_PROXY_H
+
+#include <sys/types.h>
+
+#include <osmocore/msgb.h>
+
+#include <openbsc/gprs_ns.h>
+
+struct gbproxy_config {
+	/* parsed from config file */
+	u_int32_t nsip_listen_ip;
+	u_int16_t nsip_listen_port;
+
+	u_int32_t nsip_sgsn_ip;
+	u_int16_t nsip_sgsn_port;
+
+	u_int16_t nsip_sgsn_nsei;
+	u_int16_t nsip_sgsn_nsvci;
+
+	/* misc */
+	struct gprs_ns_inst *nsi;
+};
+
+
+/* gb_proxy_vty .c */
+
+int gbproxy_vty_init(void);
+int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg);
+
+
+/* gb_proxy.c */
+
+/* Main input function for Gb proxy */
+int gbprox_rcvmsg(struct msgb *msg, struct gprs_nsvc *nsvc, uint16_t ns_bvci);
+
+#endif
diff --git a/openbsc/include/openbsc/gprs_ns.h b/openbsc/include/openbsc/gprs_ns.h
index dd10d33..ca02c4b 100644
--- a/openbsc/include/openbsc/gprs_ns.h
+++ b/openbsc/include/openbsc/gprs_ns.h
@@ -76,10 +76,46 @@
 
 /* Our Implementation */
 #include <netinet/in.h>
+#include <osmocore/linuxlist.h>
+#include <osmocore/msgb.h>
+#include <osmocore/timer.h>
+#include <osmocore/select.h>
 
 #define NSE_S_BLOCKED	0x0001
 #define NSE_S_ALIVE	0x0002
 
+enum gprs_ns_ll {
+	GPRS_NS_LL_UDP,
+	GPRS_NS_LL_E1,
+};
+
+enum gprs_ns_evt {
+	GPRS_NS_EVT_UNIT_DATA,
+};
+
+struct gprs_nsvc;
+typedef int gprs_ns_cb_t(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+			 struct msgb *msg, u_int16_t bvci);
+
+/* An instance of the NS protocol stack */
+struct gprs_ns_inst {
+	/* callback to the user for incoming UNIT DATA IND */
+	gprs_ns_cb_t *cb;
+
+	/* linked lists of all NSVC in this instance */
+	struct llist_head gprs_nsvcs;
+
+	/* which link-layer are we based on? */
+	enum gprs_ns_ll ll;
+
+	union {
+		/* NS-over-IP specific bits */
+		struct {
+			struct bsc_fd fd;
+		} nsip;
+	};
+};
+
 struct gprs_nsvc {
 	struct llist_head list;
 	struct gprs_ns_inst *nsi;
@@ -103,16 +139,6 @@
 	};
 };
 
-
-struct gprs_ns_inst;
-
-enum gprs_ns_evt {
-	GPRS_NS_EVT_UNIT_DATA,
-};
-
-typedef int gprs_ns_cb_t(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
-			 struct msgb *msg, u_int16_t bvci);
-
 /* Create a new NS protocol instance */
 struct gprs_ns_inst *gprs_ns_instantiate(gprs_ns_cb_t *cb);
 
@@ -137,5 +163,6 @@
 
 /* Establish a connection (from the BSS) to the SGSN */
 struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi,
-				struct sockaddr_in *dest, uint16_t nsvci);
+				struct sockaddr_in *dest, uint16_t nsei,
+				uint16_t nsvci);
 #endif
diff --git a/openbsc/src/gb_proxy_main.c b/openbsc/src/gb_proxy_main.c
index 1793757..8f03060 100644
--- a/openbsc/src/gb_proxy_main.c
+++ b/openbsc/src/gb_proxy_main.c
@@ -41,6 +41,7 @@
 #include <openbsc/gprs_ns.h>
 #include <openbsc/telnet_interface.h>
 #include <openbsc/vty.h>
+#include <openbsc/gb_proxy.h>
 
 #include "../bscconfig.h"
 
@@ -53,7 +54,6 @@
 void *tall_bsc_ctx;
 
 struct gprs_ns_inst *gbprox_nsi;
-static u_int16_t nsip_listen_port = 23000;
 
 const char *openbsc_version = "Osmocom NSIP Proxy " PACKAGE_VERSION;
 const char *openbsc_copyright =
@@ -64,7 +64,8 @@
 	"This is free software: you are free to change and redistribute it.\n"
 	"There is NO WARRANTY, to the extent permitted by law.\n";
 
-static char *config_file = "nsip_proxy.cfg";
+static char *config_file = "gb_proxy.cfg";
+static struct gbproxy_config gbcfg;
 
 /* Pointer to the SGSN peer */
 extern struct gbprox_peer *gbprox_peer_sgsn;
@@ -105,19 +106,27 @@
 	log_set_all_filter(stderr_target, 1);
 
 	telnet_init(&dummy_network, 4244);
+	rc = gbproxy_parse_config(config_file, &gbcfg);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n");
+		exit(2);
+	}
 
 	gbprox_nsi = gprs_ns_instantiate(&proxy_ns_cb);
 	if (!gbprox_nsi) {
 		LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
 		exit(1);
 	}
-	nsip_listen(gbprox_nsi, nsip_listen_port);
+	gbcfg.nsi = gbprox_nsi;
+	nsip_listen(gbprox_nsi, gbcfg.nsip_listen_port);
 
 	/* 'establish' the outgoing connection to the SGSN */
 	sin.sin_family = AF_INET;
-	sin.sin_port = ntohs(23000);
-	inet_aton("192.168.100.239", &sin.sin_addr);
-	gbprox_peer_sgsn = nsip_connect(gbprox_nsi, &sin, 2342);
+	sin.sin_port = htons(gbcfg.nsip_sgsn_port);
+	sin.sin_addr.s_addr = htonl(gbcfg.nsip_sgsn_ip);
+	gbprox_peer_sgsn = nsip_connect(gbprox_nsi, &sin,
+					gbcfg.nsip_sgsn_nsei,
+					gbcfg.nsip_sgsn_nsvci);
 
 	while (1) {
 		rc = bsc_select_main(0);
diff --git a/openbsc/src/gb_proxy_vty.c b/openbsc/src/gb_proxy_vty.c
index ae6be5e..16f6a1e 100644
--- a/openbsc/src/gb_proxy_vty.c
+++ b/openbsc/src/gb_proxy_vty.c
@@ -27,27 +27,18 @@
 #include <osmocore/talloc.h>
 
 #include <openbsc/debug.h>
+#include <openbsc/gb_proxy.h>
+#include <openbsc/gprs_ns.h>
 
 #include <vty/command.h>
 #include <vty/vty.h>
 
-struct gbproxy_config {
-	u_int32_t nsip_listen_ip;
-	u_int16_t nsip_listen_port;
-
-	u_int32_t nsip_sgsn_ip;
-	u_int16_t nsip_sgsn_port;
-
-	u_int16_t nsip_sgsn_nsei;
-	u_int16_t nsip_sgsn_nsvci;
-};
-
 static struct gbproxy_config *g_cfg = NULL;
 
 /*
  * vty code for mgcp below
  */
-struct cmd_node gbproxy_node = {
+static struct cmd_node gbproxy_node = {
 	GBPROXY_NODE,
 	"%s(gbproxy)#",
 	1,
@@ -83,6 +74,21 @@
       SHOW_STR "Display information about the Gb proxy")
 {
 	/* FIXME: iterate over list of NS-VC's and display their state */
+	struct gprs_ns_inst *nsi = g_cfg->nsi;
+	struct gprs_nsvc *nsvc;
+
+	llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
+		vty_out(vty, "NSEI %5u, NS-VC %5u, %s-mode, %s %s%s",
+			nsvc->nsei, nsvc->nsvci,
+			nsvc->remote_end_is_sgsn ? "BSS" : "SGSN",
+			nsvc->state & NSE_S_ALIVE ? "ALIVE" : "DEAD",
+			nsvc->state & NSE_S_BLOCKED ? "BLOCKED" : "UNBLOCKED",
+			VTY_NEWLINE);
+		if (nsvc->nsi->ll == GPRS_NS_LL_UDP)
+			vty_out(vty, "  remote peer %s:%u%s",
+				inet_ntoa(nsvc->ip.bts_addr.sin_addr),
+				ntohs(nsvc->ip.bts_addr.sin_port), VTY_NEWLINE);
+	}
 
 	return CMD_SUCCESS;
 }
diff --git a/openbsc/src/gprs_ns.c b/openbsc/src/gprs_ns.c
index 3bb0bf9..18d189f 100644
--- a/openbsc/src/gprs_ns.c
+++ b/openbsc/src/gprs_ns.c
@@ -72,30 +72,6 @@
 	},
 };
 
-enum gprs_ns_ll {
-	GPRS_NS_LL_UDP,
-	GPRS_NS_LL_E1,
-};
-
-/* An instance of the NS protocol stack */
-struct gprs_ns_inst {
-	/* callback to the user for incoming UNIT DATA IND */
-	gprs_ns_cb_t *cb;
-
-	/* linked lists of all NSVC in this instance */
-	struct llist_head gprs_nsvcs;
-
-	/* which link-layer are we based on? */
-	enum gprs_ns_ll ll;
-
-	union {
-		/* NS-over-IP specific bits */
-		struct {
-			struct bsc_fd fd;
-		} nsip;
-	};
-};
-
 /* Lookup struct gprs_nsvc based on NSVCI */
 static struct gprs_nsvc *nsvc_by_nsvci(struct gprs_ns_inst *nsi,
 					u_int16_t nsvci)
@@ -565,7 +541,8 @@
 
 /* Establish a connection (from the BSS) to the SGSN */
 struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi,
-				struct sockaddr_in *dest, uint16_t nsvci)
+				struct sockaddr_in *dest, uint16_t nsei,
+				uint16_t nsvci)
 {
 	struct gprs_nsvc *nsvc;
 
@@ -574,6 +551,8 @@
 		nsvc = nsvc_create(nsi, nsvci);
 		nsvc->ip.bts_addr = *dest;
 	}
+	nsvc->nsei = nsei;
+	nsvc->nsvci = nsvci;
 	nsvc->remote_end_is_sgsn = 1;
 
 	/* Initiate a RESET procedure */