diff --git a/dockers/docker-dhcp-server/cli-plugin-tests/test_config_dhcp_server.py b/dockers/docker-dhcp-server/cli-plugin-tests/test_config_dhcp_server.py
index 379ad502eb..9cc12aa3ca 100644
--- a/dockers/docker-dhcp-server/cli-plugin-tests/test_config_dhcp_server.py
+++ b/dockers/docker-dhcp-server/cli-plugin-tests/test_config_dhcp_server.py
@@ -158,3 +158,85 @@ class TestConfigDHCPServer(object):
         result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["disable"], ["Vlan200"], obj=db)
         assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
 
+    def test_config_dhcp_server_ipv4_update_does_not_exist(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan200"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
+    def test_config_dhcp_server_ipv4_update_already_exist(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
+    def test_config_dhcp_server_ipv4_update_wrong_mode(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--mode=XX"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
+    def test_config_dhcp_server_ipv4_update_lease_time(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--lease_time=1800"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4|Vlan100", "lease_time") == "1800"
+
+    def test_config_dhcp_server_ipv4_update_wrong_lease_time(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--lease_time=-1800"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
+    def test_config_dhcp_server_ipv4_update_dup_gw_nm(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--dup_gw_nm"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4|Vlan100", "gateway") == "100.1.1.1"
+        assert mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4|Vlan100", "netmask") == "255.255.255.0"
+
+    def test_config_dhcp_server_ipv4_update_dup_gw_nm_no_data(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan300", "--dup_gw_nm"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
+    def test_config_dhcp_server_ipv4_update_gateway(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--gateway=100.1.1.9"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4|Vlan100", "gateway") == "100.1.1.9"
+
+    def test_config_dhcp_server_ipv4_update_wrong_gateway(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--gateway=100.1.9"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
+    def test_config_dhcp_server_ipv4_update_netmask(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--netmask=255.255.254.0"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4|Vlan100", "netmask") == "255.255.254.0"
+
+    def test_config_dhcp_server_ipv4_update_wrong_netmask(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["update"], ["Vlan100", "--netmask=255.255.254"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+
diff --git a/dockers/docker-dhcp-server/cli/config/plugins/dhcp_server.py b/dockers/docker-dhcp-server/cli/config/plugins/dhcp_server.py
index 43d7fd5c8c..9abd5a275f 100644
--- a/dockers/docker-dhcp-server/cli/config/plugins/dhcp_server.py
+++ b/dockers/docker-dhcp-server/cli/config/plugins/dhcp_server.py
@@ -116,6 +116,50 @@ def dhcp_server_ipv4_del(db, dhcp_interface):
         ctx.fail("Dhcp interface {} does not exist in config db".format(dhcp_interface))
 
 
+@dhcp_server_ipv4.command(name="update")
+@click.argument("dhcp_interface", required=True)
+@click.option("--mode", required=False)
+@click.option("--lease_time", required=False)
+@click.option("--dup_gw_nm", required=False, default=False, is_flag=True)
+@click.option("--gateway", required=False)
+@click.option("--netmask", required=False)
+@clicommon.pass_db
+def dhcp_server_ipv4_update(db, mode, lease_time, dup_gw_nm, gateway, netmask, dhcp_interface):
+    ctx = click.get_current_context()
+    dbconn = db.db
+    key = "DHCP_SERVER_IPV4|" + dhcp_interface
+    if not dbconn.exists("CONFIG_DB", key):
+        ctx.fail("Dhcp interface {} does not exist in config db".format(dhcp_interface))
+    if mode:
+        if mode != "PORT":
+            ctx.fail("Only mode PORT is supported")
+        else:
+            dbconn.set("CONFIG_DB", key, "mode", mode)
+    if lease_time:
+        if not validate_str_type("uint32", lease_time):
+            ctx.fail("lease_time is required and must be nonnegative integer")
+        else:
+            dbconn.set("CONFIG_DB", key, "lease_time", lease_time)
+    if dup_gw_nm:
+        dup_success = False
+        for key in dbconn.keys("CONFIG_DB", "VLAN_INTERFACE|" + dhcp_interface + "|*"):
+            intf = ipaddress.ip_interface(key.split("|")[2])
+            if intf.version != 4:
+                continue
+            dup_success = True
+            gateway, netmask = str(intf.ip), str(intf.netmask)
+        if not dup_success:
+            ctx.fail("failed to found gateway and netmask for Vlan interface {}".format(dhcp_interface))
+    elif gateway and not validate_str_type("ipv4-address", gateway):
+        ctx.fail("gateway must be valid ipv4 string")
+    elif netmask and not validate_str_type("ipv4-address", netmask):
+        ctx.fail("netmask must be valid ipv4 string")
+    if gateway:
+        dbconn.set("CONFIG_DB", key, "gateway", gateway)
+    if netmask:
+        dbconn.set("CONFIG_DB", key, "netmask", netmask)
+
+
 @dhcp_server_ipv4.command(name="enable")
 @click.argument("dhcp_interface", required=True)
 @clicommon.pass_db