diff --git a/configs/dk-tm4c129x/ipv6/defconfig b/configs/dk-tm4c129x/ipv6/defconfig
index d31b78c0f92..7980f0bb385 100644
--- a/configs/dk-tm4c129x/ipv6/defconfig
+++ b/configs/dk-tm4c129x/ipv6/defconfig
@@ -636,7 +636,7 @@ CONFIG_NET_ICMPv6=y
 CONFIG_NET_ICMPv6_PING=y
 CONFIG_NET_ICMPv6_NEIGHBOR=y
 CONFIG_ICMPv6_NEIGHBOR_MAXTRIES=5
-CONFIG_ICMPv6_NEIGHBOR_DELAYMSEC=100
+CONFIG_ICMPv6_NEIGHBOR_DELAYMSEC=20
 
 #
 # IGMPv2 Client Support
diff --git a/net/icmpv6/Kconfig b/net/icmpv6/Kconfig
index d1a30df562c..48652e4791f 100644
--- a/net/icmpv6/Kconfig
+++ b/net/icmpv6/Kconfig
@@ -42,7 +42,7 @@ config ICMPv6_NEIGHBOR_MAXTRIES
 
 config ICMPv6_NEIGHBOR_DELAYMSEC
 	int "ICMPv6 re-solicit delay"
-	default 100
+	default 20
 	---help---
 		Wait this number of milliseconds after sending the Neighbor
 		Solicitation before checking if the IPv6 address mapping is present