diff --git a/dm/dmtree/tr181/dhcp.c b/dm/dmtree/tr181/dhcp.c
index 0d49896..5f6250a 100644
--- a/dm/dmtree/tr181/dhcp.c
+++ b/dm/dmtree/tr181/dhcp.c
@@ -2567,6 +2567,8 @@ int set_DHCPv4RelayForwarding_Interface(char *refparam, struct dmctx *ctx, void
 				adm_entry_get_linker_value(ctx, newvalue, &linker);
 			} else
 				adm_entry_get_linker_value(ctx, value, &linker);
+			if(linker == NULL)
+				return FAULT_9007;
 			uci_path_foreach_sections(icwmpd, "dmmap_dhcp_relay", "interface", s) {
 				dmuci_get_value_by_section_string(s, "section_name", &v);
 				if(strcmp(v, linker) == 0)
diff --git a/dm/dmtree/tr181/ip.c b/dm/dmtree/tr181/ip.c
index d76b3cb..828365b 100644
--- a/dm/dmtree/tr181/ip.c
+++ b/dm/dmtree/tr181/ip.c
@@ -3219,7 +3219,7 @@ int browseIPIfaceInst(struct dmctx *dmctx, DMNODE *parent_node, void *prev_data,
 		}
 		dmuci_get_value_by_section_string(p->config_section, "proto", &proto);
 		dmuci_get_value_by_section_string(p->config_section, "ip_int_instance", &inst);
-		if (ipv4addr[0] == '\0' && ipv6addr[0] == '\0' && strcmp(proto, "dhcp") != 0 && strcmp(proto, "dhcpv6") != 0 && strcmp(inst, "") == 0 && strcmp(type, "bridge") != 0) {
+		if (ipv4addr[0] == '\0' && ipv6addr[0] == '\0' && strcmp(proto, "dhcp") != 0 && strcmp(proto, "dhcpv6") != 0 && strcmp(proto, "relay") != 0 && strcmp(inst, "") == 0 && strcmp(type, "bridge") != 0) {
 			continue;
 		}
 		init_ip_args(&curr_ip_args, p->config_section, ipv4addr, ipv6addr);