small fixes for ipv6 mgmtdomains, one more problem with reservedip an…

…d dualstack mgmtdomains identified but not fixed yet

src/cnaas_nms/api/mgmtdomain.py

@@ -44,6 +44,8 @@ class f_mgmtdomain(BaseModel):
     @field_validator("ipv4_gw")
     @classmethod
     def ipv4_gw_valid_address(cls, v):
+        if not v:
+            return v
         try:
             addr = IPv4Interface(v)
             prefix_len = int(addr.network.prefixlen)
@@ -62,6 +64,8 @@ def ipv4_gw_valid_address(cls, v):
     @field_validator("ipv6_gw")
     @classmethod
     def ipv6_gw_valid_address(cls, v):
+        if not v:
+            return v
         try:
             addr = IPv6Interface(v)
             prefix_len = int(addr.network.prefixlen)

src/cnaas_nms/devicehandler/init_device.py

@@ -509,7 +509,7 @@ def init_access_device_step1(
 
         secondary_mgmt_ip = None
         if mgmtdomain.is_dual_stack:
-            secondary_mgmt_ip = mgmtdomain.find_free_secondary_mgmt_ip()
+            secondary_mgmt_ip = mgmtdomain.find_free_secondary_mgmt_ip(session)
             if not secondary_mgmt_ip:
                 raise Exception(
                     "Could not find free secondary management IP for management domain {}/{}".format(

src/cnaas_nms/devicehandler/sync_devices.py

@@ -330,6 +330,7 @@ def populate_device_vars(
                     {
                         "id": mgmtdom.id,
                         "ipv4_gw": mgmtdom.ipv4_gw,
+                        "ipv6_gw": mgmtdom.ipv6_gw,
                         "vlan": mgmtdom.vlan,
                         "description": mgmtdom.description,
                         "esi_mac": mgmtdom.esi_mac,