diff --git a/dockers/docker-dhcp-relay/dhcpv6-relay.agents.j2 b/dockers/docker-dhcp-relay/dhcpv6-relay.agents.j2
index 8f83e05efc7c..e392711f5326 100644
--- a/dockers/docker-dhcp-relay/dhcpv6-relay.agents.j2
+++ b/dockers/docker-dhcp-relay/dhcpv6-relay.agents.j2
@@ -13,7 +13,7 @@
 [program:dhcp6relay]
 command=/usr/sbin/dhcp6relay
 {#- Dual ToR Option #}
-{% if 'subtype' in DEVICE_METADATA['localhost'] and DEVICE_METADATA['localhost']['subtype'] == 'DualToR' %} -d{% endif %}
+{% if 'subtype' in DEVICE_METADATA['localhost'] and DEVICE_METADATA['localhost']['subtype'] == 'DualToR' %} -u Loopback0 {% endif %}
 
 priority=3
 autostart=false
diff --git a/src/dhcprelay b/src/dhcprelay
index c36b8e3d2113..6a6ce245125d 160000
--- a/src/dhcprelay
+++ b/src/dhcprelay
@@ -1 +1 @@
-Subproject commit c36b8e3d2113976f319fb02db94971e9b27e6416
+Subproject commit 6a6ce245125d600ad07fc02638e96ba6c18d1b4b