diff --git a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t0.j2 b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t0.j2
index 5e4be75b82..bda06c6442 100644
--- a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t0.j2
+++ b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t0.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2024-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '144129024' %}
+{% set ingress_lossless_pool_size =  '145321984' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '158229504' %}
-{% set egress_lossy_pool_size =  '144129024' %}
+{% set egress_lossy_pool_size =  '145321984' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t1.j2 b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t1.j2
index 5e4be75b82..bda06c6442 100644
--- a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t1.j2
+++ b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C224O8/buffers_defaults_t1.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2024-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '144129024' %}
+{% set ingress_lossless_pool_size =  '145321984' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '158229504' %}
-{% set egress_lossy_pool_size =  '144129024' %}
+{% set egress_lossy_pool_size =  '145321984' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t0.j2 b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t0.j2
index a2390d7652..6bf96f786d 100644
--- a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t0.j2
+++ b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t0.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2024-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '142703616' %}
+{% set ingress_lossless_pool_size =  '144019456' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '158229504' %}
-{% set egress_lossy_pool_size =  '142703616' %}
+{% set egress_lossy_pool_size =  '144019456' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t1.j2 b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t1.j2
index a2390d7652..6bf96f786d 100644
--- a/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t1.j2
+++ b/device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t1.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2024-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '142703616' %}
+{% set ingress_lossless_pool_size =  '144019456' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '158229504' %}
-{% set egress_lossy_pool_size =  '142703616' %}
+{% set egress_lossy_pool_size =  '144019456' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t0.j2 b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t0.j2
index b88ff8ca20..d6e2b569be 100644
--- a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t0.j2
+++ b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t0.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '108270592' %}
+{% set ingress_lossless_pool_size =  '110656512' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '136209408' %}
-{% set egress_lossy_pool_size =  '108270592' %}
+{% set egress_lossy_pool_size =  '110656512' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t1.j2 b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t1.j2
index b88ff8ca20..d6e2b569be 100644
--- a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t1.j2
+++ b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C448O16/buffers_defaults_t1.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '108270592' %}
+{% set ingress_lossless_pool_size =  '110656512' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '136209408' %}
-{% set egress_lossy_pool_size =  '108270592' %}
+{% set egress_lossy_pool_size =  '110656512' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t0.j2 b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t0.j2
index 3488f25dd7..6726735884 100644
--- a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t0.j2
+++ b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t0.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '105419776' %}
+{% set ingress_lossless_pool_size =  '108051456' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '136209408' %}
-{% set egress_lossy_pool_size =  '105419776' %}
+{% set egress_lossy_pool_size =  '108051456' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 
diff --git a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t1.j2 b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t1.j2
index 3488f25dd7..6726735884 100644
--- a/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t1.j2
+++ b/device/mellanox/x86_64-nvidia_sn5640-r0/Mellanox-SN5640-C512S2/buffers_defaults_t1.j2
@@ -1,6 +1,6 @@
 {#
     SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
-    Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+    Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,10 +22,10 @@
             'spinerouter_leafrouter' : '0m'
        }
 -%}
-{% set ingress_lossless_pool_size =  '105419776' %}
+{% set ingress_lossless_pool_size =  '108051456' %}
 {% set ingress_lossless_pool_xoff =  '0' %}
 {% set egress_lossless_pool_size =  '136209408' %}
-{% set egress_lossy_pool_size =  '105419776' %}
+{% set egress_lossy_pool_size =  '108051456' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}