diff --git a/dockers/docker-orchagent/ndppd.conf.j2 b/dockers/docker-orchagent/ndppd.conf.j2
index bc375f3c49..dbb7073468 100644
--- a/dockers/docker-orchagent/ndppd.conf.j2
+++ b/dockers/docker-orchagent/ndppd.conf.j2
@@ -21,7 +21,7 @@
 {%              set _x = proxy_interfaces[intf].append(prefix) %}
 {%          endif %}
 {%      endfor -%}
-
+route-ttl 2147483647
 {%      for intf, prefix_list in proxy_interfaces.items() %}
 {%          if prefix_list %}
 
diff --git a/src/sonic-config-engine/tests/sample_output/py2/ndppd.conf b/src/sonic-config-engine/tests/sample_output/py2/ndppd.conf
index 71ff1dfaf9..edae81fffd 100644
--- a/src/sonic-config-engine/tests/sample_output/py2/ndppd.conf
+++ b/src/sonic-config-engine/tests/sample_output/py2/ndppd.conf
@@ -4,6 +4,7 @@
 #
 # Config file for ndppd, the NDP Proxy Daemon
 # See man page for ndppd.conf.5 for descriptions of all available options
+route-ttl 2147483647
 
 proxy Vlan1000 {
     rule fc02:1000::/64 {
diff --git a/src/sonic-config-engine/tests/sample_output/py3/ndppd.conf b/src/sonic-config-engine/tests/sample_output/py3/ndppd.conf
index 28a239006d..66117155cd 100644
--- a/src/sonic-config-engine/tests/sample_output/py3/ndppd.conf
+++ b/src/sonic-config-engine/tests/sample_output/py3/ndppd.conf
@@ -4,6 +4,7 @@
 #
 # Config file for ndppd, the NDP Proxy Daemon
 # See man page for ndppd.conf.5 for descriptions of all available options
+route-ttl 2147483647
 
 proxy Vlan1000 {
     rule fc01:1000::/64 {