diff --git a/ansible/roles/test/templates/ptf_nn_agent.conf.dut.j2 b/ansible/roles/test/templates/ptf_nn_agent.conf.dut.j2
index 7e327fde45d..ba0245578b2 100644
--- a/ansible/roles/test/templates/ptf_nn_agent.conf.dut.j2
+++ b/ansible/roles/test/templates/ptf_nn_agent.conf.dut.j2
@@ -1,5 +1,5 @@
 [program:ptf_nn_agent]
-command=/usr/bin/python /opt/ptf_nn_agent.py --device-socket 1@tcp://0.0.0.0:10900 -i 1-{{ nn_target_port }}@{{ nn_target_interface }} --set-nn-rcv-buffer=109430400 --set-iface-rcv-buffer=109430400 --set-nn-snd-buffer=109430400 --set-iface-snd-buffer=109430400
+command=/usr/bin/python /opt/ptf_nn_agent.py --device-socket 1@tcp://0.0.0.0:10900 -i 1-{{ nn_target_port }}@{{ nn_target_interface }} --set-nn-rcv-buffer=609430400 --set-iface-rcv-buffer=609430400 --set-nn-snd-buffer=609430400 --set-iface-snd-buffer=609430400
 process_name=ptf_nn_agent
 stdout_logfile=/tmp/ptf_nn_agent.out.log
 stderr_logfile=/tmp/ptf_nn_agent.err.log
diff --git a/ansible/swap_syncd.yml b/ansible/swap_syncd.yml
index bfe55a8af1b..8cec6f5e41d 100644
--- a/ansible/swap_syncd.yml
+++ b/ansible/swap_syncd.yml
@@ -50,6 +50,13 @@
         value: 509430500
         sysctl_set: yes
 
+    - name: Set sysctl SENDBUF parameter for tests
+      become: true
+      sysctl:
+        name: "net.core.wmem_max"
+        value: 509430500
+        sysctl_set: yes
+
     - name: Gather SONiC base image version
       shell: sonic-cfggen -y /etc/sonic/sonic_version.yml -v build_version
       register: result