diff --git a/openbsc/src/gprs/gb_proxy_vty.c b/openbsc/src/gprs/gb_proxy_vty.c
index bfa1f3b..63546d3 100644
--- a/openbsc/src/gprs/gb_proxy_vty.c
+++ b/openbsc/src/gprs/gb_proxy_vty.c
@@ -82,9 +82,7 @@
 
 	install_element(CONFIG_NODE, &cfg_gbproxy_cmd);
 	install_node(&gbproxy_node, config_write_gbproxy);
-	install_default(GBPROXY_NODE);
-	install_element(GBPROXY_NODE, &ournode_exit_cmd);
-	install_element(GBPROXY_NODE, &ournode_end_cmd);
+	bsc_install_default(GBPROXY_NODE);
 	install_element(GBPROXY_NODE, &cfg_nsip_sgsn_nsei_cmd);
 
 	return 0;
diff --git a/openbsc/src/gprs/sgsn_vty.c b/openbsc/src/gprs/sgsn_vty.c
index a4ba280..8106b7d 100644
--- a/openbsc/src/gprs/sgsn_vty.c
+++ b/openbsc/src/gprs/sgsn_vty.c
@@ -418,9 +418,7 @@
 
 	install_element(CONFIG_NODE, &cfg_sgsn_cmd);
 	install_node(&sgsn_node, config_write_sgsn);
-	install_default(SGSN_NODE);
-	install_element(SGSN_NODE, &ournode_exit_cmd);
-	install_element(SGSN_NODE, &ournode_end_cmd);
+	bsc_install_default(SGSN_NODE);
 	install_element(SGSN_NODE, &cfg_sgsn_bind_addr_cmd);
 	install_element(SGSN_NODE, &cfg_ggsn_remote_ip_cmd);
 	//install_element(SGSN_NODE, &cfg_ggsn_remote_port_cmd);
diff --git a/openbsc/src/libbsc/abis_nm_vty.c b/openbsc/src/libbsc/abis_nm_vty.c
index fd60210..5db667d 100644
--- a/openbsc/src/libbsc/abis_nm_vty.c
+++ b/openbsc/src/libbsc/abis_nm_vty.c
@@ -183,8 +183,7 @@
 	install_element(ENABLE_NODE, &oml_classnum_inst_cmd);
 	install_node(&oml_node, dummy_config_write);
 
-	install_default(OML_NODE);
-	install_element(OML_NODE, &ournode_exit_cmd);
+	bsc_install_default(OML_NODE);
 	install_element(OML_NODE, &oml_chg_adm_state_cmd);
 	install_element(OML_NODE, &oml_opstart_cmd);
 
diff --git a/openbsc/src/libbsc/abis_om2000_vty.c b/openbsc/src/libbsc/abis_om2000_vty.c
index 3df005b..eb8f4d5 100644
--- a/openbsc/src/libbsc/abis_om2000_vty.c
+++ b/openbsc/src/libbsc/abis_om2000_vty.c
@@ -445,8 +445,7 @@
 	install_element(ENABLE_NODE, &om2k_classnum_inst_cmd);
 	install_node(&om2k_node, dummy_config_write);
 
-	install_default(OM2K_NODE);
-	install_element(OM2K_NODE, &ournode_exit_cmd);
+	bsc_install_default(OM2K_NODE);
 	install_element(OM2K_NODE, &om2k_reset_cmd);
 	install_element(OM2K_NODE, &om2k_start_cmd);
 	install_element(OM2K_NODE, &om2k_status_cmd);
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index 45df90f..5748945 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -3002,9 +3002,7 @@
 
 	install_element(CONFIG_NODE, &cfg_net_cmd);
 	install_node(&net_node, config_write_net);
-	install_default(GSMNET_NODE);
-	install_element(GSMNET_NODE, &ournode_exit_cmd);
-	install_element(GSMNET_NODE, &ournode_end_cmd);
+	bsc_install_default(GSMNET_NODE);
 	install_element(GSMNET_NODE, &cfg_net_ncc_cmd);
 	install_element(GSMNET_NODE, &cfg_net_mnc_cmd);
 	install_element(GSMNET_NODE, &cfg_net_name_short_cmd);
@@ -3040,9 +3038,7 @@
 
 	install_element(GSMNET_NODE, &cfg_bts_cmd);
 	install_node(&bts_node, config_write_bts);
-	install_default(BTS_NODE);
-	install_element(BTS_NODE, &ournode_exit_cmd);
-	install_element(BTS_NODE, &ournode_end_cmd);
+	bsc_install_default(BTS_NODE);
 	install_element(BTS_NODE, &cfg_bts_type_cmd);
 	install_element(BTS_NODE, &cfg_description_cmd);
 	install_element(BTS_NODE, &cfg_no_description_cmd);
@@ -3102,9 +3098,7 @@
 
 	install_element(BTS_NODE, &cfg_trx_cmd);
 	install_node(&trx_node, dummy_config_write);
-	install_default(TRX_NODE);
-	install_element(TRX_NODE, &ournode_exit_cmd);
-	install_element(TRX_NODE, &ournode_end_cmd);
+	bsc_install_default(TRX_NODE);
 	install_element(TRX_NODE, &cfg_trx_arfcn_cmd);
 	install_element(TRX_NODE, &cfg_description_cmd);
 	install_element(TRX_NODE, &cfg_no_description_cmd);
@@ -3116,9 +3110,7 @@
 
 	install_element(TRX_NODE, &cfg_ts_cmd);
 	install_node(&ts_node, dummy_config_write);
-	install_default(TS_NODE);
-	install_element(TS_NODE, &ournode_exit_cmd);
-	install_element(TS_NODE, &ournode_end_cmd);
+	bsc_install_default(TS_NODE);
 	install_element(TS_NODE, &cfg_ts_pchan_cmd);
 	install_element(TS_NODE, &cfg_ts_pchan_compat_cmd);
 	install_element(TS_NODE, &cfg_ts_tsc_cmd);
diff --git a/openbsc/src/libcommon/common_vty.c b/openbsc/src/libcommon/common_vty.c
index 7aca4ca..0bf43b0 100644
--- a/openbsc/src/libcommon/common_vty.c
+++ b/openbsc/src/libcommon/common_vty.c
@@ -174,3 +174,13 @@
 		talloc_free(*dst);
 	*dst = talloc_strdup(ctx, newstr);
 }
+
+void bsc_install_default(enum node_type node)
+{
+	install_default (node);
+
+	if (node > CONFIG_NODE) {
+		install_element(node, &ournode_exit_cmd);
+		install_element(node, &ournode_end_cmd);
+	}
+}
diff --git a/openbsc/src/libmgcp/mgcp_vty.c b/openbsc/src/libmgcp/mgcp_vty.c
index 833908a..9421f4f 100644
--- a/openbsc/src/libmgcp/mgcp_vty.c
+++ b/openbsc/src/libmgcp/mgcp_vty.c
@@ -786,9 +786,7 @@
 	install_element(CONFIG_NODE, &cfg_mgcp_cmd);
 	install_node(&mgcp_node, config_write_mgcp);
 
-	install_default(MGCP_NODE);
-	install_element(MGCP_NODE, &ournode_exit_cmd);
-	install_element(MGCP_NODE, &ournode_end_cmd);
+	bsc_install_default(MGCP_NODE);
 	install_element(MGCP_NODE, &cfg_mgcp_local_ip_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_bts_ip_cmd);
 	install_element(MGCP_NODE, &cfg_mgcp_bind_ip_cmd);
@@ -820,9 +818,7 @@
 
 	install_element(MGCP_NODE, &cfg_mgcp_trunk_cmd);
 	install_node(&trunk_node, config_write_trunk);
-	install_default(TRUNK_NODE);
-	install_element(TRUNK_NODE, &ournode_exit_cmd);
-	install_element(TRUNK_NODE, &ournode_end_cmd);
+	bsc_install_default(TRUNK_NODE);
 	install_element(TRUNK_NODE, &cfg_trunk_payload_number_cmd);
 	install_element(TRUNK_NODE, &cfg_trunk_payload_name_cmd);
 	install_element(TRUNK_NODE, &cfg_trunk_payload_number_cmd_old);
diff --git a/openbsc/src/libmsc/smpp_vty.c b/openbsc/src/libmsc/smpp_vty.c
index dd9b0c0..bf503f5 100644
--- a/openbsc/src/libmsc/smpp_vty.c
+++ b/openbsc/src/libmsc/smpp_vty.c
@@ -509,7 +509,7 @@
 int smpp_vty_init(void)
 {
 	install_node(&smpp_node, config_write_smpp);
-	install_default(SMPP_NODE);
+	bsc_install_default(SMPP_NODE);
 	install_element(CONFIG_NODE, &cfg_smpp_cmd);
 
 	install_element(SMPP_NODE, &cfg_smpp_port_cmd);
@@ -519,7 +519,7 @@
 	install_element(SMPP_NODE, &cfg_no_esme_cmd);
 
 	install_node(&esme_node, config_write_esme);
-	install_default(SMPP_ESME_NODE);
+	bsc_install_default(SMPP_ESME_NODE);
 	install_element(SMPP_ESME_NODE, &cfg_esme_passwd_cmd);
 	install_element(SMPP_ESME_NODE, &cfg_esme_no_passwd_cmd);
 	install_element(SMPP_ESME_NODE, &cfg_esme_route_pfx_cmd);
diff --git a/openbsc/src/libmsc/vty_interface_layer3.c b/openbsc/src/libmsc/vty_interface_layer3.c
index 79c3457..19c78ea 100644
--- a/openbsc/src/libmsc/vty_interface_layer3.c
+++ b/openbsc/src/libmsc/vty_interface_layer3.c
@@ -975,9 +975,7 @@
 
 	install_element(CONFIG_NODE, &cfg_mncc_int_cmd);
 	install_node(&mncc_int_node, config_write_mncc_int);
-	install_default(MNCC_INT_NODE);
-	install_element(MNCC_INT_NODE, &ournode_exit_cmd);
-	install_element(MNCC_INT_NODE, &ournode_end_cmd);
+	bsc_install_default(MNCC_INT_NODE);
 	install_element(MNCC_INT_NODE, &mnccint_def_codec_f_cmd);
 	install_element(MNCC_INT_NODE, &mnccint_def_codec_h_cmd);
 
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_vty.c b/openbsc/src/osmo-bsc/osmo_bsc_vty.c
index f6cf1a0..90b0a0c 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_vty.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_vty.c
@@ -609,7 +609,7 @@
 	install_element(CONFIG_NODE, &cfg_net_bsc_cmd);
 
 	install_node(&bsc_node, config_write_bsc);
-	install_default(BSC_NODE);
+	bsc_install_default(BSC_NODE);
 	install_element(BSC_NODE, &cfg_net_bsc_mid_call_text_cmd);
 	install_element(BSC_NODE, &cfg_net_bsc_mid_call_timeout_cmd);
 	install_element(BSC_NODE, &cfg_net_rf_socket_cmd);
@@ -617,7 +617,7 @@
 	install_element(BSC_NODE, &cfg_net_no_rf_off_time_cmd);
 
 	install_node(&msc_node, config_write_msc);
-	install_default(MSC_NODE);
+	bsc_install_default(MSC_NODE);
 	install_element(MSC_NODE, &cfg_net_bsc_token_cmd);
 	install_element(MSC_NODE, &cfg_net_bsc_ncc_cmd);
 	install_element(MSC_NODE, &cfg_net_bsc_mcc_cmd);
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
index b2ec156..9eab574 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
@@ -1192,9 +1192,7 @@
 	/* nat group */
 	install_element(CONFIG_NODE, &cfg_nat_cmd);
 	install_node(&nat_node, config_write_nat);
-	install_default(NAT_NODE);
-	install_element(NAT_NODE, &ournode_exit_cmd);
-	install_element(NAT_NODE, &ournode_end_cmd);
+	bsc_install_default(NAT_NODE);
 	install_element(NAT_NODE, &cfg_nat_msc_ip_cmd);
 	install_element(NAT_NODE, &cfg_nat_msc_port_cmd);
 	install_element(NAT_NODE, &cfg_nat_auth_time_cmd);
@@ -1235,18 +1233,14 @@
 	install_element(NAT_NODE, &cfg_nat_pgroup_cmd);
 	install_element(NAT_NODE, &cfg_nat_no_pgroup_cmd);
 	install_node(&pgroup_node, config_write_pgroup);
-	install_default(PGROUP_NODE);
-	install_element(PGROUP_NODE, &ournode_exit_cmd);
-	install_element(PGROUP_NODE, &ournode_end_cmd);
+	bsc_install_default(PGROUP_NODE);
 	install_element(PGROUP_NODE, &cfg_pgroup_lac_cmd);
 	install_element(PGROUP_NODE, &cfg_pgroup_no_lac_cmd);
 
 	/* BSC subgroups */
 	install_element(NAT_NODE, &cfg_bsc_cmd);
 	install_node(&bsc_node, config_write_bsc);
-	install_default(NAT_BSC_NODE);
-	install_element(NAT_BSC_NODE, &ournode_exit_cmd);
-	install_element(NAT_BSC_NODE, &ournode_end_cmd);
+	bsc_install_default(NAT_BSC_NODE);
 	install_element(NAT_BSC_NODE, &cfg_bsc_token_cmd);
 	install_element(NAT_BSC_NODE, &cfg_bsc_lac_cmd);
 	install_element(NAT_BSC_NODE, &cfg_bsc_no_lac_cmd);