[Dhcp_server] add config dhcp_server bind/unbind (#17811)

* add dhcp_server bind/unbind

dockers/docker-dhcp-server/cli-plugin-tests/mock_config_db.json

@@ -8,10 +8,18 @@
     },
     "VLAN_INTERFACE|Vlan200": {
     },
-    "VLAN_INTERFACE|Vlan200|100.1.1.2/24": {
+    "VLAN_INTERFACE|Vlan200|100.1.2.2/24": {
     },
     "VLAN_INTERFACE|Vlan300": {
     },
+    "VLAN_MEMBER|Vlan100|Ethernet2": {
+    },
+    "VLAN_MEMBER|Vlan100|Ethernet4": {
+    },
+    "VLAN_MEMBER|Vlan100|Ethernet7": {
+    },
+    "VLAN_MEMBER|Vlan100|Ethernet8": {
+    },
     "DHCP_SERVER_IPV4|Vlan100": {
         "gateway": "100.1.1.1",
         "lease_time": "3600",
@@ -42,17 +50,23 @@
     "DHCP_SERVER_IPV4_RANGE|range3": {
         "range": "100.1.1.10"
     },
+    "DHCP_SERVER_IPV4_RANGE|range5": {
+        "range": "100.1.2.10"
+    },
+    "DHCP_SERVER_IPV4_RANGE|range6": {
+        "range": "100.1.2.11"
+    },
     "DHCP_SERVER_IPV4_IP|eth0": {
         "ip": "240.127.1.2"
     },
     "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4": {
-        "ips": "100.1.1.10,10.1.1.11"
+        "ips": "100.1.1.10,100.1.1.11"
     },
     "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7": {
         "ranges": "range1,range3"
     },
     "DHCP_SERVER_IPV4_PORT|Vlan200|Ethernet8": {
-        "ranges": "range1,range4"
+        "ranges": "range5,range6"
     },
     "DHCP_SERVER_IPV4_PORT|Ethernet9": {
         "ranges": "range5,range6"

dockers/docker-dhcp-server/cli-plugin-tests/test_config_dhcp_server.py

@@ -51,7 +51,7 @@ class TestConfigDHCPServer(object):
 
     def test_config_dhcp_server_ipv4_add_dup_gw_nm(self, mock_db):
         expected_value = {
-            "gateway": "100.1.1.2",
+            "gateway": "100.1.2.2",
             "lease_time": "1000",
             "mode": "PORT",
             "netmask": "255.255.255.0",
@@ -370,3 +370,239 @@ class TestConfigDHCPServer(object):
         assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
         assert mock_db.exists("CONFIG_DB", "DHCP_SERVER_IPV4_RANGE|range1") == False
 
+    def test_config_dhcp_server_ipv4_bind_range_nonexisting(self, mock_db):
+        expected_value = "range2,range3"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet2", "--range", "range2,range3"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet2", "ranges")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_bind_ip_nonexisting(self, mock_db):
+        expected_value = "100.1.1.1,100.1.1.2"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet2", "100.1.1.1,100.1.1.2"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet2", "ips")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_bind_range_existing_no_duplicate(self, mock_db):
+        expected_value = "range1,range2,range3"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet7", "--range", "range2"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7", "ranges")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_bind_range_existing_duplicate(self, mock_db):
+        expected_value = "range1,range2,range3"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet7", "--range", "range2,range3"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7", "ranges")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_bind_ip_existing_no_duplicate(self, mock_db):
+        expected_value = "100.1.1.10,100.1.1.11,100.1.1.12,100.1.1.13"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet4", "100.1.1.12,100.1.1.13"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4", "ips")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_bind_ip_existing_duplicate(self, mock_db):
+        expected_value = "100.1.1.10,100.1.1.11,100.1.1.12"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet4", "100.1.1.11,100.1.1.12"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4", "ips")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_bind_nonexisting_range(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet7", "--range", "range4"], 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_bind_range_out_of_subnet(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet7", "--range", "range5"], 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_bind_ip_out_of_subnet(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet4", "100.1.2.10"], 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_bind_interface_not_in_vlan(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet5", "100.1.1.10"], 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_bind_range_and_ip(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet2", "100.1.1.13,100.1.1.14", "--range", "range3"], 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_bind_range_to_existing_ip(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet4", "--range", "range3"], 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_bind_ip_to_existing_range(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet7", "100.1.1.13,100.1.1.14"], 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_bind_nothing(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["bind"], \
+                ["Vlan100", "Ethernet2"], 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_unbind_range_with_remain(self, mock_db):
+        expected_value = "range1"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet7", "--range", "range3"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7", "ranges")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_unbind_range_with_no_remain(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet7", "--range", "range1,range3"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.exists("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7") == False
+
+    def test_config_dhcp_server_ipv4_unbind_range_with_all(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet7", "all"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.exists("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet7") == False
+
+    def test_config_dhcp_server_ipv4_unbind_ip_with_remain(self, mock_db):
+        expected_value = "100.1.1.10"
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet4", "100.1.1.11"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        result = mock_db.get("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4", "ips")
+        assert result and set(result.split(",")) == set(expected_value.split(","))
+
+    def test_config_dhcp_server_ipv4_unbind_ip_with_no_remain(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet4", "100.1.1.10,100.1.1.11"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.exists("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4") == False
+
+    def test_config_dhcp_server_ipv4_unbind_ip_all(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet4", "all"], obj=db)
+        assert result.exit_code == 0, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+        assert mock_db.exists("CONFIG_DB", "DHCP_SERVER_IPV4_PORT|Vlan100|Ethernet4") == False
+
+    def test_config_dhcp_server_ipv4_unbind_range_and_ip(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet2", "100.1.1.13,100.1.1.14", "--range", "range3"], 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_unbind_range_to_existing_ip(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet4", "--range", "range3"], 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_unbind_ip_to_existing_range(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet7", "100.1.1.13,100.1.1.14"], 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_unbind_nothing(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet4"], 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_unbind_unbind_range(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet7", "--range", "range2"], 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_unbind_unbind_ip(self, mock_db):
+        runner = CliRunner()
+        db = clicommon.Db()
+        db.db = mock_db
+        result = runner.invoke(dhcp_server.dhcp_server.commands["ipv4"].commands["unbind"], \
+                ["Vlan100", "Ethernet4", "100.1.1.13,100.1.1.14"], obj=db)
+        assert result.exit_code == 2, "exit code: {}, Exception: {}, Traceback: {}".format(result.exit_code, result.exception, result.exc_info)
+

dockers/docker-dhcp-server/cli-plugin-tests/test_show_dhcp_server.py

@@ -76,6 +76,10 @@ class TestShowDHCPServer(object):
 +---------+------------+------------+------------------------+
 | range3  | 100.1.1.10 | 100.1.1.10 | 1                      |
 +---------+------------+------------+------------------------+
+| range5  | 100.1.2.10 | 100.1.2.10 | 1                      |
++---------+------------+------------+------------------------+
+| range6  | 100.1.2.11 | 100.1.2.11 | 1                      |
++---------+------------+------------+------------------------+
 """
         runner = CliRunner()
         db = clicommon.Db()
@@ -212,13 +216,13 @@ class TestShowDHCPServer(object):
 | Interface         | Bind       |
 +===================+============+
 | Vlan100|Ethernet4 | 100.1.1.10 |
-|                   | 10.1.1.11  |
+|                   | 100.1.1.11 |
 +-------------------+------------+
 | Vlan100|Ethernet7 | range1     |
 |                   | range3     |
 +-------------------+------------+
-| Vlan200|Ethernet8 | range1     |
+| Vlan200|Ethernet8 | range5     |
-|                   | range4     |
+|                   | range6     |
 +-------------------+------------+
 | Ethernet9         | range5     |
 |                   | range6     |
@@ -253,7 +257,7 @@ class TestShowDHCPServer(object):
 | Interface         | Bind       |
 +===================+============+
 | Vlan100|Ethernet4 | 100.1.1.10 |
-|                   | 10.1.1.11  |
+|                   | 100.1.1.11 |
 +-------------------+------------+
 | Vlan100|Ethernet7 | range1     |
 |                   | range3     |
@@ -271,8 +275,8 @@ class TestShowDHCPServer(object):
 +-------------------+--------+
 | Interface         | Bind   |
 +===================+========+
-| Vlan200|Ethernet8 | range1 |
+| Vlan200|Ethernet8 | range5 |
-|                   | range4 |
+|                   | range6 |
 +-------------------+--------+
 """
         runner = CliRunner()

dockers/docker-dhcp-server/cli/config/plugins/dhcp_server.py

@@ -252,12 +252,95 @@ def dhcp_sever_ipv4_range_del(db, range_name, force):
             for port in dbconn.keys("CONFIG_DB", "DHCP_SERVER_IPV4_PORT*"):
                 ranges = dbconn.get("CONFIG_DB", port, "ranges")
                 if ranges and range_name in ranges.split(","):
-                    ctx.fail("Range {} is referenced in {}, cannot delete, add --force to bypass".format(range_name, port))
+                    ctx.fail("Range {} is referenced in {}, cannot delete, add --force to bypass or range unbind to unbind range first".format(range_name, port))
         dbconn.delete("CONFIG_DB", key)
     else:
         ctx.fail("Range {} does not exist, cannot delete".format(range_name))
 
 
+@dhcp_server_ipv4.command(name="bind")
+@click.argument("dhcp_interface", required=True)
+@click.argument("member_interface", required=True)
+@click.option("--range", "range_", required=False)
+@click.argument("ip_list", required=False)
+@clicommon.pass_db
+def dhcp_server_ipv4_ip_bind(db, dhcp_interface, member_interface, range_, ip_list):
+    ctx = click.get_current_context()
+    dbconn = db.db
+    if not dbconn.exists("CONFIG_DB", "VLAN_MEMBER|" + dhcp_interface + "|" + member_interface):
+        ctx.fail("Cannot confirm member interface {} is really in dhcp interface {}".format(member_interface, dhcp_interface))
+    vlan_prefix = "VLAN_INTERFACE|" + dhcp_interface + "|"
+    subnets = [ipaddress.ip_network(key[len(vlan_prefix):], strict=False) for key in dbconn.keys("CONFIG_DB", vlan_prefix + "*")]
+    if range_:
+        range_ = set(range_.split(","))
+        for r in range_:
+            if not dbconn.exists("CONFIG_DB", "DHCP_SERVER_IPV4_RANGE|" + r):
+                ctx.fail("Cannot bind nonexistent range {} to interface".format(r))
+            ip_range = dbconn.get("CONFIG_DB", "DHCP_SERVER_IPV4_RANGE|" + r, "range").split(",")
+            if len(ip_range) == 1:
+                ip_start = ip_range[0]
+                ip_end = ip_range[0]
+            if len(ip_range) == 2:
+                ip_start = ip_range[0]
+                ip_end = ip_range[1]
+            if not any([ipaddress.ip_address(ip_start) in subnet and ipaddress.ip_address(ip_end) in subnet for subnet in subnets]):
+                ctx.fail("Range {} is not in any subnet of vlan {}".format(r, dhcp_interface))
+    if ip_list:
+        ip_list = set(ip_list.split(","))
+        for ip in ip_list:
+            if not validate_str_type("ipv4-address", ip):
+                ctx.fail("Illegal IP address {}".format(ip))
+            if not any([ipaddress.ip_address(ip) in subnet for subnet in subnets]):
+                ctx.fail("IP {} is not in any subnet of vlan {}".format(ip, dhcp_interface))
+    if range_ and ip_list or not range_ and not ip_list:
+        ctx.fail("Only one of range and ip list need to be provided")
+    key = "DHCP_SERVER_IPV4_PORT|" + dhcp_interface + "|" + member_interface
+    key_exist = dbconn.exists("CONFIG_DB", key)
+    for bind_value_name, bind_value in [["ips", ip_list], ["ranges", range_]]:
+        if key_exist:
+            existing_value = dbconn.get("CONFIG_DB", key, bind_value_name)
+            if (not not existing_value) == (not bind_value):
+                ctx.fail("IP bind cannot have ip range and ip list configured at the same time")
+            if bind_value:
+                value_set = set(existing_value.split(",")) if existing_value else set()
+                new_value_set = value_set.union(bind_value)
+                dbconn.set("CONFIG_DB", key, bind_value_name, ",".join(new_value_set))
+        elif bind_value:
+            dbconn.hmset("CONFIG_DB", key, {bind_value_name: ",".join(bind_value)})
+
+
+@dhcp_server_ipv4.command(name="unbind")
+@click.argument("dhcp_interface", required=True)
+@click.argument("member_interface", required=True)
+@click.option("--range", "range_", required=False)
+@click.argument("ip_list", required=False)
+@clicommon.pass_db
+def dhcp_server_ipv4_ip_unbind(db, dhcp_interface, member_interface, range_, ip_list):
+    ctx = click.get_current_context()
+    dbconn = db.db
+    key = "DHCP_SERVER_IPV4_PORT|" + dhcp_interface + "|" + member_interface
+    if ip_list == "all":
+        dbconn.delete("CONFIG_DB", key)
+        return
+    if range_ and ip_list or not range_ and not ip_list:
+        ctx.fail("Only one of range and ip list need to be provided")
+    if not dbconn.exists("CONFIG_DB", key):
+        ctx.fail("The specified dhcp_interface and member interface is not bind to ip or range")
+    for unbind_value_name, unbind_value in [["ips", ip_list], ["ranges", range_]]:
+        if unbind_value:
+            unbind_value = set(unbind_value.split(","))
+            existing_value = dbconn.get("CONFIG_DB", key, unbind_value_name)
+            value_set = set(existing_value.split(",")) if existing_value else set()
+            if value_set.issuperset(unbind_value):
+                new_value_set = value_set.difference(unbind_value)
+                if new_value_set:
+                    dbconn.set("CONFIG_DB", key, unbind_value_name, ",".join(new_value_set))
+                else:
+                    dbconn.delete("CONFIG_DB", key)
+            else:
+                ctx.fail("Attempting to unbind range or ip that is not binded")
+
+
 def register(cli):
     # cli.add_command(dhcp_server)
     pass