Changes between Version 29 and Version 30 of GENIEducation/SampleAssignments/IPRouting/Procedure

Timestamp:

09/12/13 16:53:48 (11 years ago)

Author:

nriga@bbn.com

Comment:

--

GENIEducation/SampleAssignments/IPRouting/Procedure

@@ -66 +66 @@
        <li> Reserve resources within this slice using the <a href="http://www.gpolab.bbn.com/experiment-support/IPRouting/EG-3nodes-mesh.rspec"> EG-3nodes-mesh </a>rspec</li>
     </ol>
-           
+           <b>Action:Take a screenshot of your slice when all the nodes are ready and include it in your write up</b>
                   
           </td>
@@ -72 +72 @@
 </table>
 }}}
-'''Action:Take a screenshot of your slice when all the nodes are ready and include it in your write up'''
-----
+
+[[BR]]
 
 {{{
@@ -88 +88 @@
          <h4> Questions: </h4>
              <ol>
-              <li> <b>What happens when you traceroute from A to IP address 192.168.2.2? Why? </b> <br/>Include the output of the traceroute in your writeup</li>
-              <li> <b>Setup the routing from A to 192.68.2.2 so that it goes through B. Was it enough to just modify the routing tables? What else  did you need to change in order for the traffic to flow? </b> <br/>In your writeup include all the commands you ran and a screenshot of the routing configuration</li>
-              <li> <b>What happens when you traceroute from A to IP address 192.168.2.2 after you setup the static routes? </b> <br/>In your writeup include a screenshot of the traceroute output.</li>
+              <li> <b>What happens when you traceroute from A to IP address 192.168.2.12? Why? </b> <br/>Include the output of the traceroute in your writeup</li>
+              <li> <b>Setup the routing from A to 192.68.2.12 so that it goes through B. Was it enough to just modify the routing tables? What else  did you need to change in order for the traffic to flow? Ensure that you have connectivity by running a ping from A to 192.168.2.12</b> <br/>In your writeup include all the commands you ran and a screenshot of the routing configuration</li>
+              <li> <b>What happens when you traceroute from A to IP address 192.168.2.12 after you setup the static routes? </b> <br/>In your writeup include a screenshot of the traceroute output.</li>
              </ol>        
 
@@ -97 +97 @@
 </table>
 }}}
-----
+[[BR]]
 {{{
 #!html
@@ -126 +126 @@
 </table>
 }}}
+----
 
-
+[[Image(GENIExperimenter/Tutorials/Graphics:tip.png, 40, left)]]
 = Tips =
-[[BR]]
-[[Image(GENIExperimenter/Tutorials/Graphics:tip.png, 20, left)]]Remember that you can use “ifconfig” to determine which Ethernet interface (e.g., eth0) is bound to what IP address at each of the nodes.
-
-[[Image(GENIExperimenter/Tutorials/Graphics:tip.png, 20, left)]]In order to enable IP forwarding of packets on a node you have to execute the following command:
-{{{
-echo 1 > /proc/sys/net/ipv4/ip_forward
+  * If you get a "Command not found " error when executing standard commands like `ifconfig` add `sbin` to your path:
+    {{{
+       export PATH=$PATH:/sbin
+    }}}
+  * Remember that you can use “ifconfig” to determine which Ethernet interface (e.g., eth0) is bound to what IP address at each of the nodes.
+  * In order to enable IP forwarding of packets on a node you have to execute the following command:
+  {{{
+sudo sysctl -w net.ipv4.ip_forward=1
 }}}
-
-[[Image(GENIExperimenter/Tutorials/Graphics:tip.png, 20, left)]] A new slice will always be in its initial state with NO routing set up!
-----
+  * A new slice will always be in its initial state with NO routing set up!
+  * A useful tool to debug the packet flow is [http://www.tcpdump.org/ tcpdump]. In order to install it run:
+    {{{
+       sudo apt-get install tcpdump
+    }}}