diff --git a/playbooks/roles/bifrost-ironic-install/README.md b/playbooks/roles/bifrost-ironic-install/README.md
index c7c94ead1..7251f520b 100644
--- a/playbooks/roles/bifrost-ironic-install/README.md
+++ b/playbooks/roles/bifrost-ironic-install/README.md
@@ -74,6 +74,10 @@ If you chose to utilize the dhcp server, You may wish to set default ranges:
 dhcp_pool_start: 192.168.1.200
 dhcp_pool_end: 192.168.1.250
 
+If you want to use bifrost as a dhcp relay target, please set ``dhcp_pool_mask``:
+
+dhcp_pool_mask: 255.255.255.0
+
 And also set the default dhcp address lease time:
 
 dhcp_lease_time: 12h
diff --git a/playbooks/roles/bifrost-ironic-install/templates/dnsmasq.conf.j2 b/playbooks/roles/bifrost-ironic-install/templates/dnsmasq.conf.j2
index 478ce4cf7..78d725fb2 100644
--- a/playbooks/roles/bifrost-ironic-install/templates/dnsmasq.conf.j2
+++ b/playbooks/roles/bifrost-ironic-install/templates/dnsmasq.conf.j2
@@ -66,7 +66,7 @@ dhcp-range=192.168.122.2,192.168.122.254,12h
 {% elif inventory_dhcp | bool == true %}
 dhcp-range={{dhcp_pool_start}},static,{{dhcp_static_mask}},{{dhcp_lease_time}}
 {% else %}
-dhcp-range={{dhcp_pool_start}},{{dhcp_pool_end}},{{dhcp_lease_time}}
+dhcp-range={{dhcp_pool_start}},{{dhcp_pool_end}},{% if dhcp_pool_mask is defined %}{{dhcp_pool_mask}},{% endif %}{{dhcp_lease_time}}
 {% endif %}
 
 # Override the default route supplied by dnsmasq, which assumes the
diff --git a/releasenotes/notes/dhcp_pool_mask-6d9bd4d1b78be0ab.yaml b/releasenotes/notes/dhcp_pool_mask-6d9bd4d1b78be0ab.yaml
new file mode 100644
index 000000000..6ec10ad6d
--- /dev/null
+++ b/releasenotes/notes/dhcp_pool_mask-6d9bd4d1b78be0ab.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Adds support for using dnsmasq as a DHCP relay target via the new
+    ``dhcp_pool_mask`` parameter.