diff --git a/roles/simulate-fabric/defaults/main.yml b/roles/simulate-fabric/defaults/main.yml
index 968f6d9..b038889 100644
--- a/roles/simulate-fabric/defaults/main.yml
+++ b/roles/simulate-fabric/defaults/main.yml
@@ -3,12 +3,35 @@
 
 simfabric_bridges:
   - name: databr
-    ipaddr: "10.168.0.1/24"
-    nat: True
+    addresses:
+      - "10.168.0.1/24"
+      - "10.168.1.1/24"
     interfaces:
       - veth0
 
+simfabric_links:
+  - name: veth
+    mac: "02:42:0a:a8:00:01"
+
 simfabric_interfaces:
   - veth0
   - veth1
 
+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