diff --git a/api/test/video_quality_test_fixture.h b/api/test/video_quality_test_fixture.h
index 1d8fc34650..deeb848978 100644
--- a/api/test/video_quality_test_fixture.h
+++ b/api/test/video_quality_test_fixture.h
@@ -79,7 +79,13 @@ class VideoQualityTestFixtureInterface {
       std::string graph_data_output_filename;
       std::string graph_title;
     } analyzer;
+    // Deprecated. DO NOT USE. Use config instead. This is not pipe actually,
+    // it is just configuration, that will be passed to default implementation
+    // of simulation layer.
     DefaultNetworkSimulationConfig pipe;
+    // Config for default simulation implementation. May be nullopt in that
+    // case, a default config will be used.
+    absl::optional<DefaultNetworkSimulationConfig> config;
     struct SS {                          // Spatial scalability.
       std::vector<VideoStream> streams;  // If empty, one stream is assumed.
       size_t selected_stream;
diff --git a/video/full_stack_tests.cc b/video/full_stack_tests.cc
index 9c320d795f..bed77f4161 100644
--- a/video/full_stack_tests.cc
+++ b/video/full_stack_tests.cc
@@ -59,6 +59,7 @@ struct ParamsWithLogging : public VideoQualityTest::Params {
     // Use these logging flags by default, for everything.
     logging = {flags::RtcEventLogName(), flags::RtpDumpName(),
                flags::EncodedFramePath()};
+    this->config = DefaultNetworkSimulationConfig();
   }
 };
 
@@ -105,8 +106,8 @@ TEST(FullStackTest, ForemanCifPlr5Vp9) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_VP9", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -219,7 +220,7 @@ TEST(FullStackTest, ForemanCifLink150kbpsWithoutPacketLoss) {
   foreman_cif.analyzer = {"foreman_cif_link_150kbps_net_delay_0_0_plr_0",
                           0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.link_capacity_kbps = 150;
+  foreman_cif.config->link_capacity_kbps = 150;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -232,8 +233,8 @@ TEST(FullStackTest, ForemanCifPlr5) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -246,8 +247,8 @@ TEST(FullStackTest, ForemanCifPlr5Ulpfec) {
                           0,      0,       true,  false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_ulpfec", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -260,8 +261,8 @@ TEST(FullStackTest, ForemanCifPlr5Flexfec) {
                           0,      0,       false, true,  false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_flexfec", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -274,9 +275,9 @@ TEST(FullStackTest, ForemanCif500kbpsPlr3Flexfec) {
                           0,      0,       false, true,  false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps_delay_50_0_plr_3_flexfec", 0.0,
                           0.0, kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 3;
-  foreman_cif.pipe.link_capacity_kbps = 500;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 3;
+  foreman_cif.config->link_capacity_kbps = 500;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -289,9 +290,9 @@ TEST(FullStackTest, ForemanCif500kbpsPlr3Ulpfec) {
                           0,      0,       true,  false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps_delay_50_0_plr_3_ulpfec", 0.0,
                           0.0, kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 3;
-  foreman_cif.pipe.link_capacity_kbps = 500;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 3;
+  foreman_cif.config->link_capacity_kbps = 500;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -330,8 +331,8 @@ TEST(FullStackTest, ForemanCifPlr5H264) {
                           0,      0,       false, false,  false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_H264", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -347,8 +348,8 @@ TEST(FullStackTest, ForemanCifPlr5H264SpsPpsIdrIsKeyframe) {
                           0,      0,       false, false,  false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_H264_sps_pps_idr", 0.0,
                           0.0, kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -362,8 +363,8 @@ TEST(FullStackTest, ForemanCifPlr5H264Flexfec) {
                           0,      0,       false, true,   false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_H264_flexfec", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -378,8 +379,8 @@ TEST(FullStackTest, DISABLED_ForemanCifPlr5H264Ulpfec) {
                           0,      0,       true,  false,  false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_delay_50_0_plr_5_H264_ulpfec", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.loss_percent = 5;
-  foreman_cif.pipe.queue_delay_ms = 50;
+  foreman_cif.config->loss_percent = 5;
+  foreman_cif.config->queue_delay_ms = 50;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 #endif  // defined(WEBRTC_USE_H264)
@@ -393,9 +394,9 @@ TEST(FullStackTest, ForemanCif500kbps) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.queue_length_packets = 0;
-  foreman_cif.pipe.queue_delay_ms = 0;
-  foreman_cif.pipe.link_capacity_kbps = 500;
+  foreman_cif.config->queue_length_packets = 0;
+  foreman_cif.config->queue_delay_ms = 0;
+  foreman_cif.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -408,9 +409,9 @@ TEST(FullStackTest, ForemanCif500kbpsLimitedQueue) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps_32pkts_queue", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.queue_length_packets = 32;
-  foreman_cif.pipe.queue_delay_ms = 0;
-  foreman_cif.pipe.link_capacity_kbps = 500;
+  foreman_cif.config->queue_length_packets = 32;
+  foreman_cif.config->queue_delay_ms = 0;
+  foreman_cif.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -423,9 +424,9 @@ TEST(FullStackTest, ForemanCif500kbps100ms) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps_100ms", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.queue_length_packets = 0;
-  foreman_cif.pipe.queue_delay_ms = 100;
-  foreman_cif.pipe.link_capacity_kbps = 500;
+  foreman_cif.config->queue_length_packets = 0;
+  foreman_cif.config->queue_delay_ms = 100;
+  foreman_cif.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -438,9 +439,9 @@ TEST(FullStackTest, ForemanCif500kbps100msLimitedQueue) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps_100ms_32pkts_queue", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.queue_length_packets = 32;
-  foreman_cif.pipe.queue_delay_ms = 100;
-  foreman_cif.pipe.link_capacity_kbps = 500;
+  foreman_cif.config->queue_length_packets = 32;
+  foreman_cif.config->queue_delay_ms = 100;
+  foreman_cif.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -453,9 +454,9 @@ TEST(FullStackTest, ForemanCif500kbps100msLimitedQueueRecvBwe) {
                           0,      0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_500kbps_100ms_32pkts_queue_recv_bwe",
                           0.0, 0.0, kFullStackTestDurationSecs};
-  foreman_cif.pipe.queue_length_packets = 32;
-  foreman_cif.pipe.queue_delay_ms = 100;
-  foreman_cif.pipe.link_capacity_kbps = 500;
+  foreman_cif.config->queue_length_packets = 32;
+  foreman_cif.config->queue_delay_ms = 100;
+  foreman_cif.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -468,9 +469,9 @@ TEST(FullStackTest, ForemanCif1000kbps100msLimitedQueue) {
                           0,       0,       false, false, false, "foreman_cif"};
   foreman_cif.analyzer = {"foreman_cif_1000kbps_100ms_32pkts_queue", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  foreman_cif.pipe.queue_length_packets = 32;
-  foreman_cif.pipe.queue_delay_ms = 100;
-  foreman_cif.pipe.link_capacity_kbps = 1000;
+  foreman_cif.config->queue_length_packets = 32;
+  foreman_cif.config->queue_delay_ms = 100;
+  foreman_cif.config->link_capacity_kbps = 1000;
   fixture->RunWithAnalyzer(foreman_cif);
 }
 
@@ -485,9 +486,9 @@ TEST(FullStackTest, ConferenceMotionHd2000kbps100msLimitedQueue) {
       0,       0,       false, false, false, "ConferenceMotion_1280_720_50"};
   conf_motion_hd.analyzer = {"conference_motion_hd_2000kbps_100ms_32pkts_queue",
                              0.0, 0.0, kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 32;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 32;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 
@@ -501,10 +502,10 @@ TEST(FullStackTest, ConferenceMotionHd1TLModerateLimits) {
       -1,      0,       false, false, false, "ConferenceMotion_1280_720_50"};
   conf_motion_hd.analyzer = {"conference_motion_hd_1tl_moderate_limits", 0.0,
                              0.0, kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 50;
-  conf_motion_hd.pipe.loss_percent = 3;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 50;
+  conf_motion_hd.config->loss_percent = 3;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 
@@ -518,10 +519,10 @@ TEST(FullStackTest, ConferenceMotionHd2TLModerateLimits) {
       -1,      0,       false, false, false, "ConferenceMotion_1280_720_50"};
   conf_motion_hd.analyzer = {"conference_motion_hd_2tl_moderate_limits", 0.0,
                              0.0, kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 50;
-  conf_motion_hd.pipe.loss_percent = 3;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 50;
+  conf_motion_hd.config->loss_percent = 3;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 
@@ -535,10 +536,10 @@ TEST(FullStackTest, ConferenceMotionHd3TLModerateLimits) {
       -1,      0,       false, false, false, "ConferenceMotion_1280_720_50"};
   conf_motion_hd.analyzer = {"conference_motion_hd_3tl_moderate_limits", 0.0,
                              0.0, kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 50;
-  conf_motion_hd.pipe.loss_percent = 3;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 50;
+  conf_motion_hd.config->loss_percent = 3;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 
@@ -552,10 +553,10 @@ TEST(FullStackTest, ConferenceMotionHd4TLModerateLimits) {
       -1,      0,       false, false, false, "ConferenceMotion_1280_720_50"};
   conf_motion_hd.analyzer = {"conference_motion_hd_4tl_moderate_limits", 0.0,
                              0.0, kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 50;
-  conf_motion_hd.pipe.loss_percent = 3;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 50;
+  conf_motion_hd.config->loss_percent = 3;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 
@@ -571,10 +572,10 @@ TEST(FullStackTest, ConferenceMotionHd3TLModerateLimitsAltTLPattern) {
       -1,      0,       false, false, false, "ConferenceMotion_1280_720_50"};
   conf_motion_hd.analyzer = {"conference_motion_hd_3tl_alt_moderate_limits",
                              0.0, 0.0, kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 50;
-  conf_motion_hd.pipe.loss_percent = 3;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 50;
+  conf_motion_hd.config->loss_percent = 3;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 
@@ -590,9 +591,9 @@ TEST(FullStackTest, ConferenceMotionHd2000kbps100msLimitedQueueVP9) {
   conf_motion_hd.analyzer = {
       "conference_motion_hd_2000kbps_100ms_32pkts_queue_vp9", 0.0, 0.0,
       kFullStackTestDurationSecs};
-  conf_motion_hd.pipe.queue_length_packets = 32;
-  conf_motion_hd.pipe.queue_delay_ms = 100;
-  conf_motion_hd.pipe.link_capacity_kbps = 2000;
+  conf_motion_hd.config->queue_length_packets = 32;
+  conf_motion_hd.config->queue_delay_ms = 100;
+  conf_motion_hd.config->link_capacity_kbps = 2000;
   fixture->RunWithAnalyzer(conf_motion_hd);
 }
 #endif
@@ -666,9 +667,9 @@ TEST(FullStackTest, ScreenshareSlidesVP8_2TL_LossyNet) {
   screenshare.screenshare[0] = {true, false, 10};
   screenshare.analyzer = {"screenshare_slides_lossy_net", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  screenshare.pipe.loss_percent = 5;
-  screenshare.pipe.queue_delay_ms = 200;
-  screenshare.pipe.link_capacity_kbps = 500;
+  screenshare.config->loss_percent = 5;
+  screenshare.config->queue_delay_ms = 200;
+  screenshare.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(screenshare);
 }
 
@@ -684,9 +685,9 @@ TEST(FullStackTest, ScreenshareSlidesVP8_2TL_VeryLossyNet) {
   screenshare.screenshare[0] = {true, false, 10};
   screenshare.analyzer = {"screenshare_slides_very_lossy", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  screenshare.pipe.loss_percent = 10;
-  screenshare.pipe.queue_delay_ms = 200;
-  screenshare.pipe.link_capacity_kbps = 500;
+  screenshare.config->loss_percent = 10;
+  screenshare.config->queue_delay_ms = 200;
+  screenshare.config->link_capacity_kbps = 500;
   fixture->RunWithAnalyzer(screenshare);
 }
 
@@ -702,9 +703,9 @@ TEST(FullStackTest, ScreenshareSlidesVP8_2TL_LossyNetRestrictedQueue) {
   screenshare.screenshare[0] = {true, false, 10};
   screenshare.analyzer = {"screenshare_slides_lossy_limited", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  screenshare.pipe.loss_percent = 5;
-  screenshare.pipe.link_capacity_kbps = 200;
-  screenshare.pipe.queue_length_packets = 30;
+  screenshare.config->loss_percent = 5;
+  screenshare.config->link_capacity_kbps = 200;
+  screenshare.config->queue_length_packets = 30;
 
   fixture->RunWithAnalyzer(screenshare);
 }
@@ -721,9 +722,9 @@ TEST(FullStackTest, ScreenshareSlidesVP8_2TL_ModeratelyRestricted) {
   screenshare.screenshare[0] = {true, false, 10};
   screenshare.analyzer = {"screenshare_slides_moderately_restricted", 0.0, 0.0,
                           kFullStackTestDurationSecs};
-  screenshare.pipe.loss_percent = 1;
-  screenshare.pipe.link_capacity_kbps = 1200;
-  screenshare.pipe.queue_length_packets = 30;
+  screenshare.config->loss_percent = 1;
+  screenshare.config->link_capacity_kbps = 1200;
+  screenshare.config->queue_length_packets = 30;
 
   fixture->RunWithAnalyzer(screenshare);
 }
@@ -856,7 +857,7 @@ TEST(FullStackTest, VP9KSVC_3SL_Medium_Network_Restricted) {
   simulcast.ss[0] = {
       std::vector<VideoStream>(),  0,    3, 1, InterLayerPredMode::kOnKeyPic,
       std::vector<SpatialLayer>(), false};
-  simulcast.pipe.link_capacity_kbps = 1000;
+  simulcast.config->link_capacity_kbps = 1000;
   fixture->RunWithAnalyzer(simulcast);
 }
 #endif  // !defined(WEBRTC_MAC)
@@ -880,8 +881,8 @@ TEST(FullStackTest, MAYBE_SimulcastFullHdOveruse) {
                         2,       400000,  false, false, false, "Generator"};
   simulcast.analyzer = {"simulcast_HD_high", 0.0, 0.0,
                         kFullStackTestDurationSecs};
-  simulcast.pipe.loss_percent = 0;
-  simulcast.pipe.queue_delay_ms = 100;
+  simulcast.config->loss_percent = 0;
+  simulcast.config->queue_delay_ms = 100;
   std::vector<VideoStream> streams = {
     VideoQualityTest::DefaultVideoStream(simulcast, 0),
     VideoQualityTest::DefaultVideoStream(simulcast, 0),
@@ -902,8 +903,8 @@ TEST(FullStackTest, SimulcastVP8_3SL_High) {
   simulcast.video[0] = kSimulcastVp8VideoHigh;
   simulcast.analyzer = {"simulcast_vp8_3sl_high", 0.0, 0.0,
                         kFullStackTestDurationSecs};
-  simulcast.pipe.loss_percent = 0;
-  simulcast.pipe.queue_delay_ms = 100;
+  simulcast.config->loss_percent = 0;
+  simulcast.config->queue_delay_ms = 100;
   ParamsWithLogging video_params_high;
   video_params_high.video[0] = kSimulcastVp8VideoHigh;
   ParamsWithLogging video_params_medium;
@@ -928,8 +929,8 @@ TEST(FullStackTest, SimulcastVP8_3SL_Medium) {
   simulcast.video[0] = kSimulcastVp8VideoHigh;
   simulcast.analyzer = {"simulcast_vp8_3sl_medium", 0.0, 0.0,
                         kFullStackTestDurationSecs};
-  simulcast.pipe.loss_percent = 0;
-  simulcast.pipe.queue_delay_ms = 100;
+  simulcast.config->loss_percent = 0;
+  simulcast.config->queue_delay_ms = 100;
   ParamsWithLogging video_params_high;
   video_params_high.video[0] = kSimulcastVp8VideoHigh;
   ParamsWithLogging video_params_medium;
@@ -954,8 +955,8 @@ TEST(FullStackTest, SimulcastVP8_3SL_Low) {
   simulcast.video[0] = kSimulcastVp8VideoHigh;
   simulcast.analyzer = {"simulcast_vp8_3sl_low", 0.0, 0.0,
                         kFullStackTestDurationSecs};
-  simulcast.pipe.loss_percent = 0;
-  simulcast.pipe.queue_delay_ms = 100;
+  simulcast.config->loss_percent = 0;
+  simulcast.config->queue_delay_ms = 100;
   ParamsWithLogging video_params_high;
   video_params_high.video[0] = kSimulcastVp8VideoHigh;
   ParamsWithLogging video_params_medium;
@@ -980,8 +981,8 @@ TEST(FullStackTest, LargeRoomVP8_5thumb) {
   large_room.video[0] = kSimulcastVp8VideoHigh;
   large_room.analyzer = {"largeroom_5thumb", 0.0, 0.0,
                          kFullStackTestDurationSecs};
-  large_room.pipe.loss_percent = 0;
-  large_room.pipe.queue_delay_ms = 100;
+  large_room.config->loss_percent = 0;
+  large_room.config->queue_delay_ms = 100;
   ParamsWithLogging video_params_high;
   video_params_high.video[0] = kSimulcastVp8VideoHigh;
   ParamsWithLogging video_params_medium;
@@ -1017,8 +1018,8 @@ TEST(FullStackTest, MAYBE_LargeRoomVP8_15thumb) {
   large_room.video[0] = kSimulcastVp8VideoHigh;
   large_room.analyzer = {"largeroom_15thumb", 0.0, 0.0,
                          kFullStackTestDurationSecs};
-  large_room.pipe.loss_percent = 0;
-  large_room.pipe.queue_delay_ms = 100;
+  large_room.config->loss_percent = 0;
+  large_room.config->queue_delay_ms = 100;
   ParamsWithLogging video_params_high;
   video_params_high.video[0] = kSimulcastVp8VideoHigh;
   ParamsWithLogging video_params_medium;
@@ -1044,8 +1045,8 @@ TEST(FullStackTest, MAYBE_LargeRoomVP8_50thumb) {
   large_room.video[0] = kSimulcastVp8VideoHigh;
   large_room.analyzer = {"largeroom_50thumb", 0.0, 0.0,
                          kFullStackTestDurationSecs};
-  large_room.pipe.loss_percent = 0;
-  large_room.pipe.queue_delay_ms = 100;
+  large_room.config->loss_percent = 0;
+  large_room.config->queue_delay_ms = 100;
   ParamsWithLogging video_params_high;
   video_params_high.video[0] = kSimulcastVp8VideoHigh;
   ParamsWithLogging video_params_medium;
@@ -1123,10 +1124,10 @@ TEST_P(DualStreamsTest,
   std::string test_label = "dualstreams_moderately_restricted_screenshare_" +
                            std::to_string(first_stream);
   dual_streams.analyzer = {test_label, 0.0, 0.0, kFullStackTestDurationSecs};
-  dual_streams.pipe.loss_percent = 1;
-  dual_streams.pipe.link_capacity_kbps = 7500;
-  dual_streams.pipe.queue_length_packets = 30;
-  dual_streams.pipe.queue_delay_ms = 100;
+  dual_streams.config->loss_percent = 1;
+  dual_streams.config->link_capacity_kbps = 7500;
+  dual_streams.config->queue_length_packets = 30;
+  dual_streams.config->queue_delay_ms = 100;
 
   auto fixture = CreateVideoQualityTestFixture();
   fixture->RunWithAnalyzer(dual_streams);
@@ -1158,10 +1159,10 @@ TEST_P(DualStreamsTest, Conference_Restricted) {
   std::string test_label = "dualstreams_conference_restricted_screenshare_" +
                            std::to_string(first_stream);
   dual_streams.analyzer = {test_label, 0.0, 0.0, kFullStackTestDurationSecs};
-  dual_streams.pipe.loss_percent = 1;
-  dual_streams.pipe.link_capacity_kbps = 5000;
-  dual_streams.pipe.queue_length_packets = 30;
-  dual_streams.pipe.queue_delay_ms = 100;
+  dual_streams.config->loss_percent = 1;
+  dual_streams.config->link_capacity_kbps = 5000;
+  dual_streams.config->queue_length_packets = 30;
+  dual_streams.config->queue_delay_ms = 100;
 
   auto fixture = CreateVideoQualityTestFixture();
   fixture->RunWithAnalyzer(dual_streams);
diff --git a/video/screenshare_loopback.cc b/video/screenshare_loopback.cc
index ddc190d7ea..804fbccf25 100644
--- a/video/screenshare_loopback.cc
+++ b/video/screenshare_loopback.cc
@@ -274,7 +274,7 @@ DEFINE_bool(help, false, "prints this message");
 }  // namespace flags
 
 void Loopback() {
-  FakeNetworkPipe::Config pipe_config;
+  DefaultNetworkSimulationConfig pipe_config;
   pipe_config.loss_percent = flags::LossPercent();
   pipe_config.link_capacity_kbps = flags::LinkCapacityKbps();
   pipe_config.queue_length_packets = flags::QueueSize();
@@ -314,7 +314,7 @@ void Loopback() {
                      flags::DurationSecs(),
                      flags::OutputFilename(),
                      flags::GraphTitle()};
-  params.pipe = pipe_config;
+  params.config = pipe_config;
   params.logging = {flags::RtcEventLogName(), flags::RtpDumpName(),
                     flags::EncodedFramePath()};
 
diff --git a/video/sv_loopback.cc b/video/sv_loopback.cc
index b2a1e2e260..0555fb3552 100644
--- a/video/sv_loopback.cc
+++ b/video/sv_loopback.cc
@@ -473,7 +473,7 @@ void Loopback() {
     screenshare_idx = 0;
   }
 
-  FakeNetworkPipe::Config pipe_config;
+  DefaultNetworkSimulationConfig pipe_config;
   pipe_config.loss_percent = flags::LossPercent();
   pipe_config.avg_burst_loss_length = flags::AvgBurstLossLength();
   pipe_config.link_capacity_kbps = flags::LinkCapacityKbps();
@@ -538,7 +538,7 @@ void Loopback() {
                      flags::DurationSecs(),
                      flags::OutputFilename(),
                      flags::GraphTitle()};
-  params.pipe = pipe_config;
+  params.config = pipe_config;
 
   params.screenshare[camera_idx].enabled = false;
   params.screenshare[screenshare_idx] = {
diff --git a/video/video_loopback.cc b/video/video_loopback.cc
index a4d4547dfc..6f45cf3538 100644
--- a/video/video_loopback.cc
+++ b/video/video_loopback.cc
@@ -273,7 +273,7 @@ DEFINE_bool(help, false, "prints this message");
 }  // namespace flags
 
 void Loopback() {
-  FakeNetworkPipe::Config pipe_config;
+  DefaultNetworkSimulationConfig pipe_config;
   pipe_config.loss_percent = flags::LossPercent();
   pipe_config.avg_burst_loss_length = flags::AvgBurstLossLength();
   pipe_config.link_capacity_kbps = flags::LinkCapacityKbps();
@@ -317,7 +317,7 @@ void Loopback() {
                      flags::DurationSecs(),
                      flags::OutputFilename(),
                      flags::GraphTitle()};
-  params.pipe = pipe_config;
+  params.config = pipe_config;
 
   if (flags::NumStreams() > 1 && flags::Stream0().empty() &&
       flags::Stream1().empty()) {
diff --git a/video/video_quality_test.cc b/video/video_quality_test.cc
index c61d772408..a2437d5360 100644
--- a/video/video_quality_test.cc
+++ b/video/video_quality_test.cc
@@ -113,6 +113,7 @@ VideoQualityTest::Params::Params()
       screenshare{{false, false, 10, 0}, {false, false, 10, 0}},
       analyzer({"", 0.0, 0.0, 0, "", ""}),
       pipe(),
+      config(absl::nullopt),
       ss{{std::vector<VideoStream>(), 0, 0, -1, InterLayerPredMode::kOn,
           std::vector<SpatialLayer>()},
          {std::vector<VideoStream>(), 0, 0, -1, InterLayerPredMode::kOn,
@@ -139,6 +140,11 @@ std::string VideoQualityTest::GenerateGraphTitle() const {
 }
 
 void VideoQualityTest::CheckParams() {
+  if (!params_.config) {
+    // TODO(titovartem) replace with default config creation when removing
+    // pipe.
+    params_.config = params_.pipe;
+  }
   for (size_t video_idx = 0; video_idx < num_video_streams_; ++video_idx) {
     // Iterate over primary and secondary video streams.
     if (!params_.video[video_idx].enabled)
@@ -150,8 +156,8 @@ void VideoQualityTest::CheckParams() {
     if (params_.ss[video_idx].num_spatial_layers == 0)
       params_.ss[video_idx].num_spatial_layers = 1;
 
-    if (params_.pipe.loss_percent != 0 ||
-        params_.pipe.queue_length_packets != 0) {
+    if (params_.config->loss_percent != 0 ||
+        params_.config->queue_length_packets != 0) {
       // Since LayerFilteringTransport changes the sequence numbers, we can't
       // use that feature with pack loss, since the NACK request would end up
       // retransmitting the wrong packets.