diff --git a/neutron/agent/rpc.py b/neutron/agent/rpc.py
index ad635dfd994..b8e6b27d58e 100644
--- a/neutron/agent/rpc.py
+++ b/neutron/agent/rpc.py
@@ -34,7 +34,6 @@ from oslo_utils import uuidutils
 
 from neutron.agent import resource_cache
 from neutron.api.rpc.callbacks import resources
-from neutron.common import _constants as n_const
 from neutron import objects
 
 LOG = logging.getLogger(__name__)
@@ -182,7 +181,7 @@ class PluginApi(object):
         ret_devices_down = []
         failed_devices_down = []
 
-        step = n_const.RPC_RES_PROCESSING_STEP
+        step = cfg.CONF.rpc_resources_processing_step
         devices_up = list(devices_up)
         devices_down = list(devices_down)
         for i in range(0, max(len(devices_up), len(devices_down)), step):
diff --git a/neutron/agent/securitygroups_rpc.py b/neutron/agent/securitygroups_rpc.py
index 3ada8599338..a65904c6e97 100644
--- a/neutron/agent/securitygroups_rpc.py
+++ b/neutron/agent/securitygroups_rpc.py
@@ -27,7 +27,6 @@ from oslo_config import cfg
 from oslo_log import log as logging
 
 from neutron.agent import firewall
-from neutron.common import _constants as common_constants
 from neutron.conf.agent import securitygroups_rpc as sc_cfg
 
 
@@ -155,7 +154,7 @@ class SecurityGroupAgentRpc(object):
 
     @_port_filter_lock
     def _apply_port_filter(self, device_ids, update_filter=False):
-        step = common_constants.AGENT_RES_PROCESSING_STEP
+        step = cfg.CONF.rpc_resources_processing_step
         devices = {}
         security_groups = {}
         security_group_member_ips = {}
diff --git a/neutron/conf/agent/database/agents_db.py b/neutron/conf/agent/database/agents_db.py
index 10abf434bfd..aad0582bf5a 100644
--- a/neutron/conf/agent/database/agents_db.py
+++ b/neutron/conf/agent/database/agents_db.py
@@ -13,6 +13,7 @@
 from oslo_config import cfg
 
 from neutron._i18n import _
+from neutron.common import _constants
 
 AGENT_OPTS = [
     cfg.IntOpt('agent_down_time', default=75,
@@ -41,6 +42,12 @@ AGENT_OPTS = [
                        "enable_new_agents=False. In the case, user's "
                        "resources will not be scheduled automatically to the "
                        "agent until admin changes admin_state_up to True.")),
+    cfg.IntOpt("rpc_resources_processing_step",
+               default=_constants.RPC_RES_PROCESSING_STEP, min=1,
+               help=_("Number of resources for neutron to divide "
+                      "the large RPC call data sets. It can be reduced "
+                      "if RPC timeout occurred. The best value can be "
+                      "determined empirically in your environment."))
 ]
 
 
diff --git a/releasenotes/notes/introduced-config-option-for-rpc-agent-step-size-dd9595875de2b885.yaml b/releasenotes/notes/introduced-config-option-for-rpc-agent-step-size-dd9595875de2b885.yaml
new file mode 100644
index 00000000000..b4f55dbedcb
--- /dev/null
+++ b/releasenotes/notes/introduced-config-option-for-rpc-agent-step-size-dd9595875de2b885.yaml
@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    Introduced config option for RPC agent step size customization:
+    rpc_resources_processing_step - Number of resources for neutron to divide
+    the large RPC call data sets. It can be reduced if RPC timeout occurred.
+    Default value equals 20. The best value can be determined empirically in
+    your environment.