diff --git a/cmd/nginx-ingress/main.go b/cmd/nginx-ingress/main.go
index 757aec41b6..1700f2035f 100644
--- a/cmd/nginx-ingress/main.go
+++ b/cmd/nginx-ingress/main.go
@@ -476,7 +476,7 @@ func main() {
 		}
 	}
 
-	cfgParams := configs.NewDefaultConfigParams()
+	cfgParams := configs.NewDefaultConfigParams(*nginxPlus)
 
 	if *nginxConfigMaps != "" {
 		ns, name, err := k8s.ParseNamespaceName(*nginxConfigMaps)
diff --git a/docs/content/configuration/global-configuration/configmap-resource.md b/docs/content/configuration/global-configuration/configmap-resource.md
index eaf87c7e47..714aa3ff49 100644
--- a/docs/content/configuration/global-configuration/configmap-resource.md
+++ b/docs/content/configuration/global-configuration/configmap-resource.md
@@ -151,7 +151,7 @@ See the doc about [VirtualServer and VirtualServerRoute resources](/nginx-ingres
 | ---| ---| ---| --- | 
 |``lb-method`` | Sets the [load balancing method](https://docs.nginx.com/nginx/admin-guide/load-balancer/http-load-balancer/#choosing-a-load-balancing-method). To use the round-robin method, specify ``"round_robin"``. | ``"random two least_conn"`` |  | 
 |``max-fails`` | Sets the value of the [max_fails](https://nginx.org/en/docs/http/ngx_http_upstream_module.html#max_fails) parameter of the ``server`` directive. | ``1`` |  | 
-|``upstream-zone-size`` | Sets the size of the shared memory [zone](https://nginx.org/en/docs/http/ngx_http_upstream_module.html#zone) for upstreams. For NGINX, the special value 0 disables the shared memory zones. For NGINX Plus, shared memory zones are required and cannot be disabled. The special value 0 will be ignored. | ``256K`` |  | 
+|``upstream-zone-size`` | Sets the size of the shared memory [zone](https://nginx.org/en/docs/http/ngx_http_upstream_module.html#zone) for upstreams. For NGINX, the special value 0 disables the shared memory zones. For NGINX Plus, shared memory zones are required and cannot be disabled. The special value 0 will be ignored. | ``256k`` for NGINX, ``512k`` for NGINX Plus  |  | 
 |``fail-timeout`` | Sets the value of the [fail_timeout](https://nginx.org/en/docs/http/ngx_http_upstream_module.html#fail_timeout) parameter of the ``server`` directive. | ``10s`` |  | 
 |``keepalive`` | Sets the value of the [keepalive](https://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive) directive. Note that ``proxy_set_header Connection "";`` is added to the generated configuration when the value > 0. | ``0`` |  | 
 {{% /table %}} 
diff --git a/internal/configs/config_params.go b/internal/configs/config_params.go
index 33b2c4df78..37d00698fe 100644
--- a/internal/configs/config_params.go
+++ b/internal/configs/config_params.go
@@ -133,7 +133,12 @@ type Listener struct {
 }
 
 // NewDefaultConfigParams creates a ConfigParams with default values.
-func NewDefaultConfigParams() *ConfigParams {
+func NewDefaultConfigParams(isPlus bool) *ConfigParams {
+	upstreamZoneSize := "256k"
+	if isPlus {
+		upstreamZoneSize = "512k"
+	}
+
 	return &ConfigParams{
 		DefaultServerReturn:           "404",
 		ServerTokens:                  "on",
@@ -152,7 +157,7 @@ func NewDefaultConfigParams() *ConfigParams {
 		SSLPorts:                      []int{443},
 		MaxFails:                      1,
 		MaxConns:                      0,
-		UpstreamZoneSize:              "256k",
+		UpstreamZoneSize:              upstreamZoneSize,
 		FailTimeout:                   "10s",
 		LBMethod:                      "random two least_conn",
 		MainErrorLogLevel:             "notice",
diff --git a/internal/configs/configmaps.go b/internal/configs/configmaps.go
index 7305192be9..7d4e219624 100644
--- a/internal/configs/configmaps.go
+++ b/internal/configs/configmaps.go
@@ -11,7 +11,7 @@ import (
 
 // ParseConfigMap parses ConfigMap into ConfigParams.
 func ParseConfigMap(cfgm *v1.ConfigMap, nginxPlus bool, hasAppProtect bool) *ConfigParams {
-	cfgParams := NewDefaultConfigParams()
+	cfgParams := NewDefaultConfigParams(nginxPlus)
 
 	if serverTokens, exists, err := GetMapKeyAsBool(cfgm.Data, "server-tokens", cfgm); exists {
 		if err != nil {
diff --git a/internal/configs/configurator_test.go b/internal/configs/configurator_test.go
index 70562ec9e6..75e37f700b 100644
--- a/internal/configs/configurator_test.go
+++ b/internal/configs/configurator_test.go
@@ -41,7 +41,7 @@ func createTestConfigurator() (*Configurator, error) {
 
 	manager := nginx.NewFakeManager("/etc/nginx")
 
-	cnf, err := NewConfigurator(manager, createTestStaticConfigParams(), NewDefaultConfigParams(), templateExecutor, templateExecutorV2, false, false, nil, false, nil, false), nil
+	cnf, err := NewConfigurator(manager, createTestStaticConfigParams(), NewDefaultConfigParams(false), templateExecutor, templateExecutorV2, false, false, nil, false, nil, false), nil
 	if err != nil {
 		return nil, err
 	}
@@ -64,7 +64,7 @@ func createTestConfiguratorInvalidIngressTemplate() (*Configurator, error) {
 
 	manager := nginx.NewFakeManager("/etc/nginx")
 
-	cnf, err := NewConfigurator(manager, createTestStaticConfigParams(), NewDefaultConfigParams(), templateExecutor, &version2.TemplateExecutor{}, false, false, nil, false, nil, false), nil
+	cnf, err := NewConfigurator(manager, createTestStaticConfigParams(), NewDefaultConfigParams(false), templateExecutor, &version2.TemplateExecutor{}, false, false, nil, false, nil, false), nil
 	if err != nil {
 		return nil, err
 	}
diff --git a/internal/configs/ingress_test.go b/internal/configs/ingress_test.go
index cf3d3d633b..7c9c147b03 100644
--- a/internal/configs/ingress_test.go
+++ b/internal/configs/ingress_test.go
@@ -17,13 +17,13 @@ import (
 
 func TestGenerateNginxCfg(t *testing.T) {
 	cafeIngressEx := createCafeIngressEx()
-	configParams := NewDefaultConfigParams()
-
 	isPlus := false
+	configParams := NewDefaultConfigParams(isPlus)
+
 	expected := createExpectedConfigForCafeIngressEx(isPlus)
 
 	apRes := AppProtectResources{}
-	result, warnings := generateNginxCfg(&cafeIngressEx, apRes, false, configParams, false, false, &StaticConfigParams{}, false)
+	result, warnings := generateNginxCfg(&cafeIngressEx, apRes, false, configParams, isPlus, false, &StaticConfigParams{}, false)
 
 	if diff := cmp.Diff(expected, result); diff != "" {
 		t.Errorf("generateNginxCfg() returned unexpected result (-want +got):\n%s", diff)
@@ -46,9 +46,8 @@ func TestGenerateNginxCfgForJWT(t *testing.T) {
 		Path: "/etc/nginx/secrets/default-cafe-jwk",
 	}
 
-	configParams := NewDefaultConfigParams()
-
 	isPlus := true
+	configParams := NewDefaultConfigParams(isPlus)
 
 	expected := createExpectedConfigForCafeIngressEx(isPlus)
 	expected.Servers[0].JWTAuth = &version1.JWTAuth{
@@ -81,7 +80,7 @@ func TestGenerateNginxCfgForJWT(t *testing.T) {
 func TestGenerateNginxCfgWithMissingTLSSecret(t *testing.T) {
 	cafeIngressEx := createCafeIngressEx()
 	cafeIngressEx.SecretRefs["cafe-secret"].Error = errors.New("secret doesn't exist")
-	configParams := NewDefaultConfigParams()
+	configParams := NewDefaultConfigParams(false)
 
 	apRes := AppProtectResources{}
 	result, resultWarnings := generateNginxCfg(&cafeIngressEx, apRes, false, configParams, false, false, &StaticConfigParams{}, false)
@@ -105,7 +104,7 @@ func TestGenerateNginxCfgWithMissingTLSSecret(t *testing.T) {
 func TestGenerateNginxCfgWithWildcardTLSSecret(t *testing.T) {
 	cafeIngressEx := createCafeIngressEx()
 	cafeIngressEx.Ingress.Spec.TLS[0].SecretName = ""
-	configParams := NewDefaultConfigParams()
+	configParams := NewDefaultConfigParams(false)
 
 	apRes := AppProtectResources{}
 	result, warnings := generateNginxCfg(&cafeIngressEx, apRes, false, configParams, false, false, &StaticConfigParams{}, true)
@@ -176,10 +175,15 @@ func TestGenerateIngressPath(t *testing.T) {
 }
 
 func createExpectedConfigForCafeIngressEx(isPlus bool) version1.IngressNginxConfig {
+	upstreamZoneSize := "256k"
+	if isPlus {
+		upstreamZoneSize = "512k"
+	}
+
 	coffeeUpstream := version1.Upstream{
 		Name:             "default-cafe-ingress-cafe.example.com-coffee-svc-80",
 		LBMethod:         "random two least_conn",
-		UpstreamZoneSize: "256k",
+		UpstreamZoneSize: upstreamZoneSize,
 		UpstreamServers: []version1.UpstreamServer{
 			{
 				Address:     "10.0.0.1",
@@ -202,7 +206,7 @@ func createExpectedConfigForCafeIngressEx(isPlus bool) version1.IngressNginxConf
 	teaUpstream := version1.Upstream{
 		Name:             "default-cafe-ingress-cafe.example.com-tea-svc-80",
 		LBMethod:         "random two least_conn",
-		UpstreamZoneSize: "256k",
+		UpstreamZoneSize: upstreamZoneSize,
 		UpstreamServers: []version1.UpstreamServer{
 			{
 				Address:     "10.0.0.2",
@@ -356,7 +360,7 @@ func TestGenerateNginxCfgForMergeableIngresses(t *testing.T) {
 	isPlus := false
 	expected := createExpectedConfigForMergeableCafeIngress(isPlus)
 
-	configParams := NewDefaultConfigParams()
+	configParams := NewDefaultConfigParams(isPlus)
 
 	masterApRes := AppProtectResources{}
 	result, warnings := generateNginxCfgForMergeableIngresses(mergeableIngresses, masterApRes, configParams, false, false, &StaticConfigParams{}, false)
@@ -381,7 +385,7 @@ func TestGenerateNginxConfigForCrossNamespaceMergeableIngresses(t *testing.T) {
 	}
 
 	expected := createExpectedConfigForCrossNamespaceMergeableCafeIngress()
-	configParams := NewDefaultConfigParams()
+	configParams := NewDefaultConfigParams(false)
 
 	emptyApResources := AppProtectResources{}
 	result, warnings := generateNginxCfgForMergeableIngresses(mergeableIngresses, emptyApResources, configParams, false, false, &StaticConfigParams{}, false)
@@ -446,7 +450,7 @@ func TestGenerateNginxCfgForMergeableIngressesForJWT(t *testing.T) {
 
 	minionJwtKeyFileNames := make(map[string]string)
 	minionJwtKeyFileNames[objectMetaToFileName(&mergeableIngresses.Minions[0].Ingress.ObjectMeta)] = "/etc/nginx/secrets/default-coffee-jwk"
-	configParams := NewDefaultConfigParams()
+	configParams := NewDefaultConfigParams(isPlus)
 
 	masterApRes := AppProtectResources{}
 	result, warnings := generateNginxCfgForMergeableIngresses(mergeableIngresses, masterApRes, configParams, isPlus, false, &StaticConfigParams{}, false)
@@ -619,10 +623,15 @@ func createMergeableCafeIngress() *MergeableIngresses {
 }
 
 func createExpectedConfigForMergeableCafeIngress(isPlus bool) version1.IngressNginxConfig {
+	upstreamZoneSize := "256k"
+	if isPlus {
+		upstreamZoneSize = "512k"
+	}
+
 	coffeeUpstream := version1.Upstream{
 		Name:             "default-cafe-ingress-coffee-minion-cafe.example.com-coffee-svc-80",
 		LBMethod:         "random two least_conn",
-		UpstreamZoneSize: "256k",
+		UpstreamZoneSize: upstreamZoneSize,
 		UpstreamServers: []version1.UpstreamServer{
 			{
 				Address:     "10.0.0.1",
@@ -645,7 +654,7 @@ func createExpectedConfigForMergeableCafeIngress(isPlus bool) version1.IngressNg
 	teaUpstream := version1.Upstream{
 		Name:             "default-cafe-ingress-tea-minion-cafe.example.com-tea-svc-80",
 		LBMethod:         "random two least_conn",
-		UpstreamZoneSize: "256k",
+		UpstreamZoneSize: upstreamZoneSize,
 		UpstreamServers: []version1.UpstreamServer{
 			{
 				Address:     "10.0.0.2",
@@ -842,9 +851,8 @@ func createExpectedConfigForCrossNamespaceMergeableCafeIngress() version1.Ingres
 
 func TestGenerateNginxCfgForSpiffe(t *testing.T) {
 	cafeIngressEx := createCafeIngressEx()
-	configParams := NewDefaultConfigParams()
-
 	isPlus := false
+	configParams := NewDefaultConfigParams(isPlus)
 
 	expected := createExpectedConfigForCafeIngressEx(isPlus)
 	expected.SpiffeClientCerts = true
@@ -868,9 +876,8 @@ func TestGenerateNginxCfgForInternalRoute(t *testing.T) {
 	internalRouteAnnotation := "nsm.nginx.com/internal-route"
 	cafeIngressEx := createCafeIngressEx()
 	cafeIngressEx.Ingress.Annotations[internalRouteAnnotation] = "true"
-	configParams := NewDefaultConfigParams()
-
 	isPlus := false
+	configParams := NewDefaultConfigParams(isPlus)
 
 	expected := createExpectedConfigForCafeIngressEx(isPlus)
 	expected.Servers[0].SpiffeCerts = true
@@ -1339,7 +1346,9 @@ func TestGenerateNginxCfgForAppProtect(t *testing.T) {
 		},
 	}
 
-	configParams := NewDefaultConfigParams()
+	isPlus := true
+
+	configParams := NewDefaultConfigParams(isPlus)
 	apRes := AppProtectResources{
 		AppProtectPolicy:   "/etc/nginx/waf/nac-policies/default_dataguard-alarm",
 		AppProtectLogconfs: []string{"/etc/nginx/waf/nac-logconfs/default_logconf syslog:server=127.0.0.1:514"},
@@ -1348,8 +1357,6 @@ func TestGenerateNginxCfgForAppProtect(t *testing.T) {
 		MainAppProtectLoadModule: true,
 	}
 
-	isPlus := true
-
 	expected := createExpectedConfigForCafeIngressEx(isPlus)
 	expected.Servers[0].AppProtectEnable = "on"
 	expected.Servers[0].AppProtectPolicy = "/etc/nginx/waf/nac-policies/default_dataguard-alarm"
@@ -1391,7 +1398,8 @@ func TestGenerateNginxCfgForMergeableIngressesForAppProtect(t *testing.T) {
 		},
 	}
 
-	configParams := NewDefaultConfigParams()
+	isPlus := true
+	configParams := NewDefaultConfigParams(isPlus)
 	apRes := AppProtectResources{
 		AppProtectPolicy:   "/etc/nginx/waf/nac-policies/default_dataguard-alarm",
 		AppProtectLogconfs: []string{"/etc/nginx/waf/nac-logconfs/default_logconf syslog:server=127.0.0.1:514"},
@@ -1400,8 +1408,6 @@ func TestGenerateNginxCfgForMergeableIngressesForAppProtect(t *testing.T) {
 		MainAppProtectLoadModule: true,
 	}
 
-	isPlus := true
-
 	expected := createExpectedConfigForMergeableCafeIngress(isPlus)
 	expected.Servers[0].AppProtectEnable = "on"
 	expected.Servers[0].AppProtectPolicy = "/etc/nginx/waf/nac-policies/default_dataguard-alarm"
diff --git a/internal/configs/version1/nginx-plus.ingress.tmpl b/internal/configs/version1/nginx-plus.ingress.tmpl
index 69d2ad8a17..0fb18c5962 100644
--- a/internal/configs/version1/nginx-plus.ingress.tmpl
+++ b/internal/configs/version1/nginx-plus.ingress.tmpl
@@ -1,7 +1,7 @@
 # configuration for {{.Ingress.Namespace}}/{{.Ingress.Name}}
 {{range $upstream := .Upstreams}}
 upstream {{$upstream.Name}} {
-	zone {{$upstream.Name}} {{if ne $upstream.UpstreamZoneSize "0"}}{{$upstream.UpstreamZoneSize}}{{else}}256k{{end}};
+	zone {{$upstream.Name}} {{if ne $upstream.UpstreamZoneSize "0"}}{{$upstream.UpstreamZoneSize}}{{else}}512k{{end}};
 	{{if $upstream.LBMethod }}{{$upstream.LBMethod}};{{end}}
 	{{range $server := $upstream.UpstreamServers}}
 	server {{$server.Address}}:{{$server.Port}} max_fails={{$server.MaxFails}} fail_timeout={{$server.FailTimeout}} max_conns={{$server.MaxConns}}
diff --git a/internal/configs/version2/nginx-plus.virtualserver.tmpl b/internal/configs/version2/nginx-plus.virtualserver.tmpl
index b8efae7d2f..c4c76c74f2 100644
--- a/internal/configs/version2/nginx-plus.virtualserver.tmpl
+++ b/internal/configs/version2/nginx-plus.virtualserver.tmpl
@@ -1,6 +1,6 @@
 {{ range $u := .Upstreams }}
 upstream {{ $u.Name }} {
-    zone {{ $u.Name }} {{ if ne $u.UpstreamZoneSize "0" }}{{ $u.UpstreamZoneSize }}{{ else }}256k{{ end }};
+    zone {{ $u.Name }} {{ if ne $u.UpstreamZoneSize "0" }}{{ $u.UpstreamZoneSize }}{{ else }}512k{{ end }};
 
     {{ if $u.LBMethod }}{{ $u.LBMethod }};{{ end }}
 
diff --git a/internal/k8s/controller.go b/internal/k8s/controller.go
index 107b63dd27..b4ba04146c 100644
--- a/internal/k8s/controller.go
+++ b/internal/k8s/controller.go
@@ -635,7 +635,7 @@ func (lbc *LoadBalancerController) syncConfigMap(task task) {
 }
 
 func (lbc *LoadBalancerController) updateAllConfigs() {
-	cfgParams := configs.NewDefaultConfigParams()
+	cfgParams := configs.NewDefaultConfigParams(lbc.isNginxPlus)
 
 	if lbc.configMap != nil {
 		cfgParams = configs.ParseConfigMap(lbc.configMap, lbc.isNginxPlus, lbc.appProtectEnabled)
diff --git a/tests/suite/test_annotations.py b/tests/suite/test_annotations.py
index 06d097d12b..a2acd0fc74 100644
--- a/tests/suite/test_annotations.py
+++ b/tests/suite/test_annotations.py
@@ -165,7 +165,7 @@ def fin():
 @pytest.mark.ingresses
 @pytest.mark.parametrize('annotations_setup', ["standard", "mergeable"], indirect=True)
 class TestAnnotations:
-    def test_nginx_config_defaults(self, kube_apis, annotations_setup, ingress_controller_prerequisites):
+    def test_nginx_config_defaults(self, kube_apis, annotations_setup, ingress_controller_prerequisites, cli_arguments):
         print("Case 1: no ConfigMap keys, no annotations in Ingress")
         result_conf = get_ingress_nginx_template_conf(kube_apis.v1,
                                                       annotations_setup.namespace,
@@ -178,8 +178,12 @@ def test_nginx_config_defaults(self, kube_apis, annotations_setup, ingress_contr
 
         assert "Strict-Transport-Security" not in result_conf
 
+        expected_zone_size = "256k"
+        if cli_arguments["ic-type"] == "nginx-plus-ingress":
+            expected_zone_size = "512k"
+
         for upstream in annotations_setup.upstream_names:
-            assert f"zone {upstream} 256k;" in result_conf
+            assert f"zone {upstream} {expected_zone_size};" in result_conf
 
     @pytest.mark.parametrize('annotations, expected_strings, unexpected_strings', [
         ({"nginx.org/proxy-send-timeout": "10s", "nginx.org/max-conns": "1024",
@@ -318,7 +322,7 @@ def test_upstream_zone_size_0(self, cli_arguments, kube_apis,
         if cli_arguments["ic-type"] == "nginx-plus-ingress":
             print("Run assertions for Nginx Plus case")
             assert "zone " in result_conf
-            assert " 256k;" in result_conf
+            assert " 512k;" in result_conf
         elif cli_arguments["ic-type"] == "nginx-ingress":
             print("Run assertions for Nginx OSS case")
             assert "zone " not in result_conf
diff --git a/tests/suite/test_externalname_service.py b/tests/suite/test_externalname_service.py
index 38f4c85dbf..c5662107de 100644
--- a/tests/suite/test_externalname_service.py
+++ b/tests/suite/test_externalname_service.py
@@ -93,7 +93,7 @@ def test_ic_template_config_upstream_zone(self, kube_apis, ingress_controller_pr
                                                       ingress_controller_prerequisites.namespace)
         line = f"zone {external_name_setup.namespace}-" \
                f"{external_name_setup.ingress_name}-" \
-               f"{external_name_setup.ingress_host}-{external_name_setup.service}-80 256k;"
+               f"{external_name_setup.ingress_host}-{external_name_setup.service}-80 512k;"
         assert line in result_conf
 
     def test_ic_template_config_upstream_rule(self, kube_apis, ingress_controller_prerequisites,
diff --git a/tests/suite/test_v_s_route_externalname.py b/tests/suite/test_v_s_route_externalname.py
index 25c5d72394..1ef7cb14c7 100644
--- a/tests/suite/test_v_s_route_externalname.py
+++ b/tests/suite/test_v_s_route_externalname.py
@@ -123,7 +123,7 @@ def test_template_config(self, kube_apis,
                                                     ingress_controller_prerequisites.namespace)
 
         line = f"zone vs_{vsr_externalname_setup.namespace}_{vsr_externalname_setup.vs_name}" \
-            f"_vsr_{vsr_externalname_setup.route.namespace}_{vsr_externalname_setup.route.name}_ext-backend 256k;"
+            f"_vsr_{vsr_externalname_setup.route.namespace}_{vsr_externalname_setup.route.name}_ext-backend 512k;"
         assert line in initial_config
         assert "random two least_conn;" in initial_config
         assert f"server {vsr_externalname_setup.external_host}:80 max_fails=1 fail_timeout=10s max_conns=0 resolve;"\
diff --git a/tests/suite/test_virtual_server_configmap_keys.py b/tests/suite/test_virtual_server_configmap_keys.py
index e418f72c39..1a725d2ec5 100644
--- a/tests/suite/test_virtual_server_configmap_keys.py
+++ b/tests/suite/test_virtual_server_configmap_keys.py
@@ -69,7 +69,7 @@ def assert_specific_keys_for_nginx_plus(config, expected_values):
     assert f"server_tokens \"{expected_values['server-tokens']}\";" in config
     assert "random two least_conn;" not in config \
            and expected_values['lb-method'] in config
-    assert "zone " in config and " 256k;" in config
+    assert "zone " in config and " 512k;" in config
 
 
 def assert_specific_keys_for_nginx_oss(config, expected_values):
@@ -79,8 +79,15 @@ def assert_specific_keys_for_nginx_oss(config, expected_values):
            and expected_values['lb-method'] in config
     assert "zone " not in config and " 256k;" not in config
 
+def assert_defaults_of_keys_with_validation_for_nginx_plus(config, unexpected_values):
+    assert_common_defaults_of_keys_with_validation(config, unexpected_values)
+    assert "zone " in config and " 512k;" in config
+
+def assert_defaults_of_keys_with_validation_for_nginx_oss(config, unexpected_values):
+    assert_common_defaults_of_keys_with_validation(config, unexpected_values)
+    assert "zone " in config and " 256k;" in config
 
-def assert_defaults_of_keys_with_validation(config, unexpected_values):
+def assert_common_defaults_of_keys_with_validation(config, unexpected_values):
     assert "proxy_buffering on;" in config
     assert "real_ip_recursive" not in config
     assert "max_fails=1" in config
@@ -89,7 +96,6 @@ def assert_defaults_of_keys_with_validation(config, unexpected_values):
     assert "server_tokens \"on\"" in config
     assert "random two least_conn;" in config and unexpected_values['lb-method'] not in config
     assert f"proxy_send_timeout 60s;" in config
-    assert "zone " in config and " 256k;" in config
 
 
 def assert_defaults_of_keys_with_validation_in_main_config(config, unexpected_values):
@@ -222,7 +228,10 @@ def test_keys(self, cli_arguments, kube_apis, ingress_controller_prerequisites,
                                                    ingress_controller_prerequisites.namespace)
         step_4_events = get_events(kube_apis.v1, virtual_server_setup.namespace)
         assert_update_event_count_increased(virtual_server_setup, step_4_events, step_3_events)
-        assert_defaults_of_keys_with_validation(step_4_config, expected_values)
+        if cli_arguments['ic-type'] == "nginx-ingress":
+            assert_defaults_of_keys_with_validation_for_nginx_oss(step_4_config, expected_values)
+        else:
+            assert_defaults_of_keys_with_validation_for_nginx_plus(step_4_config, expected_values)
 
     def test_keys_in_main_config(self, cli_arguments, kube_apis, ingress_controller_prerequisites,
                                  crd_ingress_controller, virtual_server_setup, clean_up):
diff --git a/tests/suite/test_virtual_server_external_name.py b/tests/suite/test_virtual_server_external_name.py
index 5799ca6ae9..f9d3f7c288 100644
--- a/tests/suite/test_virtual_server_external_name.py
+++ b/tests/suite/test_virtual_server_external_name.py
@@ -78,7 +78,7 @@ def test_template_config(self, kube_apis, ingress_controller_prerequisites,
                                                  virtual_server_setup.vs_name,
                                                  vs_externalname_setup.ic_pod_name,
                                                  ingress_controller_prerequisites.namespace)
-        line = f"zone vs_{virtual_server_setup.namespace}_{virtual_server_setup.vs_name}_backend1 256k;"
+        line = f"zone vs_{virtual_server_setup.namespace}_{virtual_server_setup.vs_name}_backend1 512k;"
         assert line in result_conf
         assert "random two least_conn;" in result_conf
         assert f"server {vs_externalname_setup.external_host}:80 max_fails=1 fail_timeout=10s max_conns=0 resolve;"\