Add README and set up full topology with hosts for two-nodes

two-nodes/README.md

@@ -0,0 +1,37 @@
+# Two node topology
+
+```
+         ------        ------
+        |      |      |      |
+h1_1 ---|2 R1 1|------|1 R2 2|--- h2_1
+        |      |      |      |
+         ------        ------
+```
+
+## R1
+
+Interface | Name    | Address/Subnet
+----------|---------|---------------
+          | lo      | 10.0.0.1/32
+1         | R1-eth1 | 10.0.1.1/24
+2         | R1-eth2 | 10.1.0.254/24
+
+## R2
+
+Interface | Name    | Address/Subnet
+----------|---------|---------------
+          | lo      | 10.0.0.2/32
+1         | R2-eth1 | 10.0.1.2/24
+2         | R2-eth2 | 10.2.0.254/24
+
+## h1_1
+
+Interface | Name      | Address/Subnet
+----------|-----------|---------------
+          | h1_1-eth1 | 10.1.0.1/24
+
+## h2_1
+
+Interface | Name      | Address/Subnet
+----------|-----------|---------------
+          | h2_1-eth1 | 10.2.0.1/24

two-nodes/scenarios/basic/scenario.py

@@ -25,31 +25,43 @@ def scenario():
 
     os.system("rm -f /tmp/R*.log /tmp/R*.pid logs/*")
     os.system("mn -c >/dev/null 2>&1")
-    os.system("killall -9 zebra > /dev/null 2>&1")
+    os.system("killall -9 zebra staticd > /dev/null 2>&1")
 
     net = Mininet(topo=NetTopo(), switch=Router)
     net.start()
-    for router in net.switches:
-        # Enable IP forwarding
-        router.cmd("sysctl -w net.ipv4.ip_forward=1")
-        router.waitOutput()
 
+    for node in net.switches:
         # Start Zebra (routing table daemon)
-        router.cmd("/usr/lib/frr/zebra"
-                   " -f two-nodes/zebra/%s.conf"
-                   " -d"
-                   " -i /tmp/zebra-%s.pid"
-                   " > logs/%s-zebra 2>&1"
-                   % (router.name, router.name, router.name))
-        router.waitOutput()
+        node.cmd("/usr/lib/frr/zebra"
+                 " -f two-nodes/zebra/%s.conf"
+                 " -d"
+                 " -i /tmp/%s-zebra.pid"
+                 " > /tmp/%s-zebra.out 2>&1"
+                 % (node.name, node.name, node.name))
+        node.waitOutput()
 
-        # Delete spare loopback address for convenience
-        router.cmd("ip addr del 127.0.0.1/8 dev lo")
-        router.waitOutput()
+        if node.name.startswith('h'):
+            # Start static route daemon
+            node.cmd("/usr/lib/frr/staticd"
+                     " -f two-nodes/staticd/%s.conf"
+                     " -d"
+                     " -i /tmp/%s-staticd.pid"
+                     " > /tmp/%s-staticd.out 2>&1"
+                     % (node.name, node.name, node.name))
+            node.waitOutput()
+
+        if node.name.startswith('R'):
+            # Enable IP forwarding
+            node.cmd("sysctl -w net.ipv4.ip_forward=1")
+            node.waitOutput()
+
+            # Delete spare loopback address for convenience
+            node.cmd("ip addr del 127.0.0.1/8 dev lo")
+            node.waitOutput()
 
     CLI(net)
     net.stop()
-    os.system("killall -9 zebra")
+    os.system("killall -9 zebra staticd")
 
 
 if __name__ == "__main__":

two-nodes/staticd/h1_1.conf

@@ -0,0 +1,7 @@
+! -*- zebra -*-
+
+hostname h1_1
+
+ip route 0.0.0.0/0 10.1.0.254
+
+log file /tmp/h1_1-staticd.log

two-nodes/staticd/h2_1.conf

@@ -0,0 +1,7 @@
+! -*- zebra -*-
+
+hostname h2_1
+
+ip route 0.0.0.0/0 10.2.0.254
+
+log file /tmp/h2_1-staticd.log

two-nodes/topo.py

@@ -11,12 +11,15 @@ class NetTopo(Topo):
         # Add default members to class.
         super(NetTopo, self).__init__()
 
-        # The topology has one router per AS
+        # Add routers
         r_1 = self.addSwitch('R1')
         r_2 = self.addSwitch('R2')
 
-        # Setup the links as follows:
-        #
-        # R1 --- R2
-        #
+        # Add hosts
+        h_1_1 = self.addSwitch('h1_1')
+        h_2_1 = self.addSwitch('h2_1')
+
+        # Setup links as shown in README.md
         self.addLink(r_1, r_2)
+        self.addLink(r_1, h_1_1)
+        self.addLink(r_2, h_2_1)

two-nodes/zebra/R1.conf

@@ -8,4 +8,7 @@ interface lo
 interface R1-eth1
   ip address 10.0.1.1/24
 
-log file /tmp/R1.log
+interface R1-eth2
+  ip address 10.1.0.254/24
+
+log file /tmp/R1-zebra.log

two-nodes/zebra/R2.conf

@@ -8,4 +8,7 @@ interface lo
 interface R2-eth1
   ip address 10.0.1.2/24
 
-log file /tmp/R2.log
+interface R2-eth2
+  ip address 10.2.0.254/24
+
+log file /tmp/R2-zebra.log

two-nodes/zebra/h1_1.conf

@@ -0,0 +1,8 @@
+! -*- zebra -*-
+
+hostname h1_1
+
+interface h1_1-eth1
+  ip address 10.1.0.1/24
+
+log file /tmp/h1_1-zebra.log

two-nodes/zebra/h2_1.conf

@@ -0,0 +1,8 @@
+! -*- zebra -*-
+
+hostname h2_1
+
+interface h2_1-eth1
+  ip address 10.2.0.1/24
+
+log file /tmp/h2_1-zebra.log