Changes between Version 28 and Version 29 of GENIEducation/SampleAssignments/TcpAssignment/ExerciseLayout/DesignSetup

Timestamp:

05/15/13 17:01:43 (12 years ago)

Author:

shuang@bbn.com

Comment:

--

GENIEducation/SampleAssignments/TcpAssignment/ExerciseLayout/DesignSetup

@@ -493 +493 @@
 #========================================
  
+Host right
+  Port 22
+  HostName 192.1.242.66
+  User root 
+  IdentityFile /Users/shuang/.ssh/geni_key 
+ 
+Host top
+  Port 22
+  HostName 192.1.242.68
+  User root 
+  IdentityFile /Users/shuang/.ssh/geni_key 
+ 
 Host bottom
   Port 22
-  HostName 192.1.242.85
+  HostName 192.1.242.65
   User root 
   IdentityFile /Users/shuang/.ssh/geni_key 
  
+Host center
+  Port 22
+  HostName 192.1.242.67
+  User root 
+  IdentityFile /Users/shuang/.ssh/geni_key 
+ 
 Host left
   Port 22
-  HostName 192.1.242.83
-  User root 
-  IdentityFile /Users/shuang/.ssh/geni_key 
- 
-Host top
-  Port 22
-  HostName 192.1.242.84
-  User root 
-  IdentityFile /Users/shuang/.ssh/geni_key 
- 
-Host right
-  Port 22
-  HostName 192.1.242.82
-  User root 
-  IdentityFile /Users/shuang/.ssh/geni_key 
- 
-Host center
-  Port 22
-  HostName 192.1.242.81
+  HostName 192.1.242.64
   User root 
   IdentityFile /Users/shuang/.ssh/geni_key 
@@ -526 +526 @@
 LOGIN INFO for AM: https://bbn-hn.exogeni.net:11443/orca/xmlrpc
 ================================================================================
+User root logins to right using:
+        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.66 &
+User root logins to top using:
+        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.68 &
 User root logins to bottom using:
-        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.85 &
+        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.65 &
+User root logins to center using:
+        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.67 &
 User root logins to left using:
-        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.83 &
-User root logins to top using:
-        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.84 &
-User root logins to right using:
-        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.82 &
-User root logins to center using:
-        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.81 &
+        xterm -e ssh -i /Users/shuang/.ssh/geni_key root@192.1.242.64 &
 }}}
   '''Step 4. Renew the sliver:''' 
@@ -580 +580 @@
 Add correct host key in /Users/shuang/.ssh/known_hosts to get rid of this message.
 Offending RSA key in /Users/shuang/.ssh/known_hosts:20
-RSA host key for 192.1.242.81 has changed and you have requested strict checking.
+RSA host key for 192.1.242.65 has changed and you have requested strict checking.
 Host key verification failed.
 }}}
  This type of error happens when you have previously logged in a machine with the same IP address and that machine happens not to be the same one as the VM you want to log in. [[BR]]
  As a result, this error might happen a lot, especially if you have done experiments on ExoGENI before (since it always uses the same IP range for its VMs and each VM is different from each other, i.e., with different RSA keys). [[BR]]
- In this case, simply open ''~/.ssh/known_hosts'' and remove the line corresponding to the IP address you are trying to login. In our case here, find ''192.1.242.81'' and remove that line. [[BR]]
-
+ In this case, simply open ''~/.ssh/known_hosts'' and remove the line corresponding to the IP address you are trying to login. In our case here, find ''192.1.242.65'' and remove that line. [[BR]]
+
+'''Enable IP forwarding and configure routing tables'''
+ This is a very important step in terms of using ExoGENI. [[BR]]
+ Since ExoGENI does not automatically configure IP address/routing table/IP forwarding for the user (unlike protoGENI and InstaGENI), the user needs to do it manually (or give the instructions in the RSPEC file). [[BR]]
+ Step 1. enable IP forwarding on center node (we need to first stop a routine that over-write any network configurations in ExoGENI node): [[BR]]
+ On center node, run the following: 
+{{{
+ /etc/init.d/neuca stop
+ sysctl -w net.ipv4.ip_forward=1
+}}}
+ Step 2. configure default routes on the rest node: 
+ On left node, run the following: 
+{{{
+ route add -net 172.16.0.0/16 gw 172.16.2.1
+}}}
+ On right node, run the following: 
+{{{
+ route add -net 172.16.0.0/16 gw 172.16.3.1
+}}}
+ On top node, run the following: 
+{{{
+ route add -net 172.16.0.0/16 gw 172.16.4.1
+}}}
+ On bottom node, run the following: 
+{{{
+ route add -net 172.16.0.0/16 gw 172.16.5.1
+}}}
+ After these steps, we can start to do the experiments on ExoGENI virtual machines! 
 
 '''Difference between ExoGENI and InstaGENI in terms of using:''' [[BR]]