diff --git a/roles/maas-simulate-fabric/defaults/main.yml b/roles/maas-simulate-fabric/defaults/main.yml
new file mode 100755
index 0000000..c86c5ee
--- /dev/null
+++ b/roles/maas-simulate-fabric/defaults/main.yml
@@ -0,0 +1,36 @@
+---
+# maas-simulate-fabric/defaults/main.yml
+
+simfabric_bridges:
+  - name: databr
+    addresses:
+      - "10.168.0.1/24"
+      - "10.168.1.1/24"
+    interfaces:
+      - veth0
+
+simfabric_links:
+  - type: veth
+    dev: veth0
+    peer: fabric
+    mac: "02:42:0a:a8:00:01"
+
+# see note in playbook, won't apply until ansible gets module support
+simfabric_iptables:
+  - table: nat
+    chain: POSTROUTING
+    source: "10.168.0.0/16"
+    dest: "! 10.168.0.0/16"
+    jump: MASQUERADE
+
+simfabric_sysctl:
+  - name: net.ipv4.ip_forward
+    value: 1
+  - name: net.ipv4.conf.all.send_redirects
+    value: 0
+  - name: net.ipv4.conf.default.send_redirects
+    value: 0
+  - name: net.ipv4.conf.eth0.send_redirects
+    value: 0
+  - name: net.ipv4.conf.databr.send_redirects
+    value: 0