diff --git a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t0.j2 b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t0.j2
index 1013d7b29d..75c76d6cb1 100644
--- a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t0.j2
+++ b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t0.j2
@@ -35,17 +35,17 @@
         "queue1_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -70,17 +70,17 @@
         "queue1_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -108,7 +108,7 @@
 
 {% if DEVICE_METADATA
   and DEVICE_METADATA['localhost']
-  and DEVICE_METADATA['localhost'].type == "LeafRouter"
+  and DEVICE_METADATA['localhost'].type in ('LeafRouter', 'ToRRouter', 'BackEndLeafRouter', 'BackEndToRRouter')
   and DEVICE_NEIGHBOR
   and DEVICE_NEIGHBOR_METADATA %}
 {%- macro generate_queue_buffers(ports) %}
@@ -117,7 +117,7 @@
         {% if DEVICE_NEIGHBOR[port]
           and DEVICE_NEIGHBOR[port].name
           and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name]
-          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'SpineRouter') %}
+          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'SpineRouter', 'BackEndLeafRouter', 'BackEndSpineRouter') %}
             "{{ port }}|0": {
                 "profile": "queue0_uplink_lossy_profile"
             },
diff --git a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t1.j2 b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t1.j2
index 1013d7b29d..75c76d6cb1 100644
--- a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t1.j2
+++ b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t1.j2
@@ -35,17 +35,17 @@
         "queue1_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -70,17 +70,17 @@
         "queue1_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -108,7 +108,7 @@
 
 {% if DEVICE_METADATA
   and DEVICE_METADATA['localhost']
-  and DEVICE_METADATA['localhost'].type == "LeafRouter"
+  and DEVICE_METADATA['localhost'].type in ('LeafRouter', 'ToRRouter', 'BackEndLeafRouter', 'BackEndToRRouter')
   and DEVICE_NEIGHBOR
   and DEVICE_NEIGHBOR_METADATA %}
 {%- macro generate_queue_buffers(ports) %}
@@ -117,7 +117,7 @@
         {% if DEVICE_NEIGHBOR[port]
           and DEVICE_NEIGHBOR[port].name
           and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name]
-          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'SpineRouter') %}
+          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'SpineRouter', 'BackEndLeafRouter', 'BackEndSpineRouter') %}
             "{{ port }}|0": {
                 "profile": "queue0_uplink_lossy_profile"
             },
diff --git a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t0.j2 b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t0.j2
index 6d06e5afb6..36db144887 100644
--- a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t0.j2
+++ b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t0.j2
@@ -35,17 +35,17 @@
         "queue1_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -70,17 +70,17 @@
         "queue1_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -108,7 +108,7 @@
 
 {% if DEVICE_METADATA
   and DEVICE_METADATA['localhost']
-  and DEVICE_METADATA['localhost'].type == "ToRRouter"
+  and DEVICE_METADATA['localhost'].type in ('LeafRouter', 'ToRRouter', 'BackEndLeafRouter', 'BackEndToRRouter')
   and DEVICE_NEIGHBOR
   and DEVICE_NEIGHBOR_METADATA %}
 {%- macro generate_queue_buffers(ports) %}
@@ -117,7 +117,7 @@
         {% if DEVICE_NEIGHBOR[port]
           and DEVICE_NEIGHBOR[port].name
           and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name]
-          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'ToRRouter') %}
+          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'ToRRouter', 'BackEndLeafRouter', 'BackEndToRRouter') %}
             "{{ port }}|0": {
                 "profile": "queue0_uplink_lossy_profile"
             },
diff --git a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t1.j2 b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t1.j2
index 6d06e5afb6..36db144887 100644
--- a/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t1.j2
+++ b/device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C512S2/buffers_defaults_t1.j2
@@ -35,17 +35,17 @@
         "queue1_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_downlink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -70,17 +70,17 @@
         "queue1_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue2_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue3_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
             "size": "1778",
-            "dynamic_th": "-7"
+            "dynamic_th": "3"
         },
         "queue4_uplink_lossy_profile": {
             "pool": "egress_lossy_pool",
@@ -108,7 +108,7 @@
 
 {% if DEVICE_METADATA
   and DEVICE_METADATA['localhost']
-  and DEVICE_METADATA['localhost'].type == "ToRRouter"
+  and DEVICE_METADATA['localhost'].type in ('LeafRouter', 'ToRRouter', 'BackEndLeafRouter', 'BackEndToRRouter')
   and DEVICE_NEIGHBOR
   and DEVICE_NEIGHBOR_METADATA %}
 {%- macro generate_queue_buffers(ports) %}
@@ -117,7 +117,7 @@
         {% if DEVICE_NEIGHBOR[port]
           and DEVICE_NEIGHBOR[port].name
           and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name]
-          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'ToRRouter') %}
+          and DEVICE_NEIGHBOR_METADATA[DEVICE_NEIGHBOR[port].name].type in ('LeafRouter', 'ToRRouter', 'BackEndLeafRouter', 'BackEndToRRouter') %}
             "{{ port }}|0": {
                 "profile": "queue0_uplink_lossy_profile"
             },