diff --git a/deployment/neutron/neutron-l3-container-puppet.yaml b/deployment/neutron/neutron-l3-container-puppet.yaml
index 1ee233f431..847e32ff09 100644
--- a/deployment/neutron/neutron-l3-container-puppet.yaml
+++ b/deployment/neutron/neutron-l3-container-puppet.yaml
@@ -115,6 +115,16 @@ parameters:
     type: string
     default: ''
 
+  NeutronL3AgentRadvdUser:
+    default: "root"
+    description: |
+      The username passed to radvd, used to drop root privileges and change
+      user ID to username and group ID to the primary group of username. If no
+      user specified, the user executing the L3 agent will be passed. If "root"
+      specified, because radvd is spawned as root, no "username" parameter
+      will be passed
+    type: string
+
 conditions:
   keepalived_wrapper_enabled: {equals: [{get_param: NeutronEnableKeepalivedWrapper}, true]}
   haproxy_wrapper_enabled: {equals: [{get_param: NeutronEnableHaproxyDockerWrapper}, true]}
@@ -202,6 +212,7 @@ outputs:
             - external_network_bridge_empty
             - {}
             - neutron::agents::l3::external_network_bridge: {get_param: NeutronExternalNetworkBridge}
+          - neutron::agents::l3::radvd_user: {get_param: NeutronL3AgentRadvdUser}
       service_config_settings:
         map_merge:
           - get_attr: [NeutronBase, role_data, service_config_settings]
diff --git a/releasenotes/notes/l3_agent_radvd_user-1814df18745101d6.yaml b/releasenotes/notes/l3_agent_radvd_user-1814df18745101d6.yaml
new file mode 100644
index 0000000000..704563eae9
--- /dev/null
+++ b/releasenotes/notes/l3_agent_radvd_user-1814df18745101d6.yaml
@@ -0,0 +1,6 @@
+---
+other:
+  - |
+    Add "radvd_user" configuration parameter to the Neutron L3 container.
+    This parameter defines the user pased to radvd. The default value is
+    "root".