diff --git a/openbsc/include/openbsc/gprs_llc.h b/openbsc/include/openbsc/gprs_llc.h
index 3bdaddc..0ddb518 100644
--- a/openbsc/include/openbsc/gprs_llc.h
+++ b/openbsc/include/openbsc/gprs_llc.h
@@ -76,6 +76,19 @@
 	GPRS_LLMS_ASSIGNED	= 2,	/* TLLI assigned */
 };
 
+/* Section 8.9.9 LLC layer parameter default values */
+struct gprs_llc_params {
+	uint16_t iov_i_exp;
+	uint16_t t200_201;
+	uint16_t n200;
+	uint16_t n201_u;
+	uint16_t n201_i;
+	uint16_t mD;
+	uint16_t mU;
+	uint16_t kD;
+	uint16_t kU;
+};
+
 /* Section 4.7.1: Logical Link Entity: One per DLCI (TLLI + SAPI) */
 struct gprs_llc_lle {
 	struct llist_head list;
@@ -96,8 +109,9 @@
 	uint16_t vu_send;
 	uint16_t vu_recv;
 
-	unsigned int n200;
 	unsigned int retrans_ctr;
+
+	struct gprs_llc_params params;
 };
 
 #define NUM_SAPIS	16
diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c
index cb581f1..54f06f9 100644
--- a/openbsc/src/gprs/gprs_llc.c
+++ b/openbsc/src/gprs/gprs_llc.c
@@ -36,11 +36,79 @@
 #include <openbsc/gprs_llc.h>
 #include <openbsc/crc24.h>
 
+/* Section 8.9.9 LLC layer parameter default values */
+static const struct gprs_llc_params llc_default_params[] = {
+	[1] = {
+		.t200_201	= 5,
+		.n200		= 3,
+		.n201_u		= 400,
+	},
+	[2] = {
+		.t200_201	= 5,
+		.n200		= 3,
+		.n201_u		= 270,
+	},
+	[3] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 5,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 1520,
+		.mU		= 1520,
+		.kD		= 16,
+		.kU		= 16,
+	},
+	[5] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 10,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 760,
+		.mU		= 760,
+		.kD		= 8,
+		.kU		= 8,
+	},
+	[7] = {
+		.t200_201	= 20,
+		.n200		= 3,
+		.n201_u		= 270,
+	},
+	[8] = {
+		.t200_201	= 20,
+		.n200		= 3,
+		.n201_u		= 270,
+	},
+	[9] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 20,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 380,
+		.mU		= 380,
+		.kD		= 4,
+		.kU		= 4,
+	},
+	[11] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 40,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 190,
+		.mU		= 190,
+		.kD		= 2,
+		.kU		= 2,
+	},
+};
+
 LLIST_HEAD(gprs_llc_llmes);
 void *llc_tall_ctx;
 
 /* lookup LLC Entity based on DLCI (TLLI+SAPI tuple) */
-static struct gprs_llc_lle *lle_by_tlli_sapi(uint32_t tlli, uint32_t sapi)
+static struct gprs_llc_lle *lle_by_tlli_sapi(uint32_t tlli, uint8_t sapi)
 {
 	struct gprs_llc_llme *llme;
 
@@ -51,7 +119,7 @@
 	return NULL;
 }
 
-static void lle_init(struct gprs_llc_llme *llme, uint32_t sapi)
+static void lle_init(struct gprs_llc_llme *llme, uint8_t sapi)
 {
 	struct gprs_llc_lle *lle = &llme->lle[sapi];
 
@@ -59,8 +127,8 @@
 	lle->sapi = sapi;
 	lle->state = GPRS_LLES_UNASSIGNED;
 
-	/* FIXME: Initialize according to parameters from SAPI9 */
-
+	/* Initialize according to parameters */
+	memcpy(&lle->params, &llc_default_params[sapi], sizeof(lle->params));
 }
 
 static struct gprs_llc_llme *llme_alloc(uint32_t tlli)
@@ -150,7 +218,7 @@
 
 	/* 8.5.1.3: Expiry of T200 */
 
-	if (lle->retrans_ctr >= lle->n200) {
+	if (lle->retrans_ctr >= lle->params.n200) {
 		/* FIXME: LLGM-STATUS-IND, LL-RELEASE-IND/CNF */
 		lle->state = GPRS_LLES_ASSIGNED_ADM;
 	}
@@ -174,7 +242,7 @@
 {
 	struct gprs_llc_lle *lle = data;
 
-	if (lle->retrans_ctr < lle->n200) {
+	if (lle->retrans_ctr < lle->params.n200) {
 		/* FIXME: transmit apropriate supervisory frame (8.6.4.1) */
 		/* FIXME: set timer T201 */
 		lle->retrans_ctr++;
@@ -248,6 +316,13 @@
 		llme = llme_alloc(msgb_tlli(msg));
 		lle = &llme->lle[sapi];
 	}
+
+	if (msg->len > lle->params.n201_u) {
+		LOGP(DLLC, LOGL_ERROR, "Cannot Tx %u bytes (N201-U=%u)\n",
+			msg->len, lle->params.n201_u);
+		return -EFBIG;
+	}
+
 	/* Update LLE's (BVCI, NSEI) tuple */
 	lle->llme->bvci = msgb_bvci(msg);
 	lle->llme->nsei = msgb_nsei(msg);
diff --git a/openbsc/src/gprs/gprs_llc_vty.c b/openbsc/src/gprs/gprs_llc_vty.c
index 6f0de04..cb91a3a 100644
--- a/openbsc/src/gprs/gprs_llc_vty.c
+++ b/openbsc/src/gprs/gprs_llc_vty.c
@@ -52,14 +52,21 @@
 
 static void vty_dump_lle(struct vty *vty, struct gprs_llc_lle *lle)
 {
+	struct gprs_llc_params *par = &lle->params;
 	vty_out(vty, " SAPI %2u State %s VUsend=%u, VUrecv=%u", lle->sapi, 
 		get_value_string(gprs_llc_state_strs, lle->state),
 		lle->vu_send, lle->vu_recv);
-	vty_out(vty, " Vsent=%u Vack=%u Vrecv=%u, N200=%u, RetransCtr=%u%s",
-		lle->v_sent, lle->v_ack, lle->v_recv, lle->n200,
+	vty_out(vty, " Vsent=%u Vack=%u Vrecv=%u, RetransCtr=%u%s",
+		lle->v_sent, lle->v_ack, lle->v_recv,
 		lle->retrans_ctr, VTY_NEWLINE);
+	vty_out(vty, "  T200=%u, N200=%u, N201-U=%u, N201-I=%u, mD=%u, "
+		"mU=%u, kD=%u, kU=%u%s", par->t200_201, par->n200,
+		par->n201_u, par->n201_i, par->mD, par->mU, par->kD,
+		par->kU, VTY_NEWLINE);
 }
 
+static uint8_t valid_sapis[] = { 1, 2, 3, 5, 7, 8, 9, 11 };
+
 static void vty_dump_llme(struct vty *vty, struct gprs_llc_llme *llme)
 {
 	unsigned int i;
@@ -67,8 +74,15 @@
 	vty_out(vty, "TLLI %08x (Old TLLI %08x) BVCI=%u NSEI=%u: State %s%s",
 		llme->tlli, llme->old_tlli, llme->bvci, llme->nsei,
 		get_value_string(gprs_llc_state_strs, llme->state), VTY_NEWLINE);
-	for (i = 0; i < ARRAY_SIZE(llme->lle); i++) {
-		struct gprs_llc_lle *lle = &llme->lle[i];
+
+	for (i = 0; i < ARRAY_SIZE(valid_sapis); i++) {
+		struct gprs_llc_lle *lle;
+		uint8_t sapi = valid_sapis[i];
+
+		if (sapi >= ARRAY_SIZE(llme->lle))
+			continue;
+
+		lle = &llme->lle[sapi];
 		vty_dump_lle(vty, lle);
 	}
 }