diff --git a/neutron/api/rpc/handlers/l3_rpc.py b/neutron/api/rpc/handlers/l3_rpc.py
index 8702a91284a..5ecdb0c0a33 100644
--- a/neutron/api/rpc/handlers/l3_rpc.py
+++ b/neutron/api/rpc/handlers/l3_rpc.py
@@ -250,18 +250,6 @@ class L3RpcCallback(object):
                 {'port': {portbindings.HOST_ID: host,
                           'device_id': router_id}})
 
-    def get_external_network_id(self, context, **kwargs):
-        """Get one external network id for l3 agent.
-
-        l3 agent expects only one external network when it performs
-        this query.
-        """
-        context = neutron_context.get_admin_context()
-        net_id = self.plugin.get_external_network_id(context)
-        LOG.debug("External network ID returned to l3 agent: %s",
-                  net_id)
-        return net_id
-
     def get_service_plugin_list(self, context, **kwargs):
         return directory.get_plugins().keys()
 
diff --git a/neutron/db/external_net_db.py b/neutron/db/external_net_db.py
index 8deda7d9d3e..76a3b7a6d9c 100644
--- a/neutron/db/external_net_db.py
+++ b/neutron/db/external_net_db.py
@@ -143,13 +143,6 @@ class External_net_db_mixin(object):
         if l3plugin:
             l3plugin.delete_disassociated_floatingips(context, network_id)
 
-    def get_external_network_id(self, context):
-        nets = self.get_networks(context, {extnet_apidef.EXTERNAL: [True]})
-        if len(nets) > 1:
-            raise n_exc.TooManyExternalNetworks()
-        else:
-            return nets[0]['id'] if nets else None
-
     @registry.receives(resources.RBAC_POLICY, [events.BEFORE_CREATE])
     def _process_ext_policy_create(self, resource, event, trigger,
                                    payload=None):