Week 8 Understand the building blocks and usage of ClayNet Network

 Virtualization platform with reference to OSI Layer.

Objectives of the Lab:

    • Understand the building blocks of ClayNet.

    • Build a simple client-server network using routers, switches, and network hosts.

    • To learn the static IP routing behavior such as default and static routes and routing tables.

    • Use common network utilities to verify LAN operation and analyze data traffic.


Prerequisites:

This lab assumes some understanding of the building blocks of communication networks and basic client-server architecture.


Topology 1:

Create a topology in ClayNet, as shown in following figure.










Important Instructions:

To access ClayNet, type http://1.6.181.7:9000/ in browser. Login credentials will be provided by the faculty incharge.

Execution Tasks:

Task 1: Understand the network and compute components available in ClayNet.

Task 2: Drag and drop the necessary components to create the given topology. Provide the names for compute, select OS (Ubuntu 16.04 – Lite or Ubuntu 16.04 – CLI) and RAM (512 MB) as shown below.








Task 3: Drag and drop the Routers and set the IP addresses for all the necessary router ports. (You can also set them later by right clicking on the router icon and selecting ‘Device Configuration’.)




















Task 4: Go to connection manager and select appropriate Source, Source ports, Target and Target ports and save the connection.












Task 5: To deploy the topology, save the topology first and deploy it by clicking ‘Deploy’ button available on the top. (Note: It will take few seconds or even minutes to deploy the topology for the first time).

Task 5: Go to ‘Remote Desktop’ by right clicking on client and server icons and set the IP addresses accordingly. Also add the gateway address. (Login: user - test, password - test) Client:

IP Address ---> 10.10.10.2    Gateway ---> 10.10.10.1




































Server:

IP Address ---> 30.30.30.2    Gateway ---> 30.30.30.1

Task 6: From client, ping to server 30.30.30.2. Ping will not be successful and Router1 will reply with ‘Destination host unreachable’.












Task 7: Set up the following routing table entries for Routers 1 & 2.

Routers
Destination
Next hop gateway
Via
Router 1
30.30.30.0
20.20.20.2
Direct




Router 2
10.10.10.0
20.20.20.1
Direct

Steps to add the routing table entries:

Step 1: Login to Router1 by right clicking on Router icon and selecting ‘Console Access’. (Type ‘Enter’ key once to get into Login screen. Username - test, Password- test@12345) Step 2: Display the routing table to view all static routes using the command.
show route summary -s active data














































Note in routing table of Router1 that there is no route to reach the destination network

30.30.30.0/24. Go to configure mode and start configuring the router for all the possible routes. Step 3: Configure a static route in Router1 for destination 30.30.30.0/24 with next-hop gateway as 20.20.20.2, which is the IP address of Router2.












Step 4: Check routing table again and verify that the route is added.







































Step 5: Repeat the steps 3 & 4 to configure a static route in Router2 for destination

10.10.10.0/24 with next-hop gateway as 20.20.20.1, which is the IP address of Router1.














































Task 8: Now Ping will be successful as all the required routers are now configured. Observe the TTL getting decremented by 2 because two hops/routers are in between. Also keep the Wireshark ready for observation.














Task 9: Also observe the output of tracepath -n 30.30.30.2 command on Client.

Record these observations in your notebook. Upload the following screenshots in Edmodo.

    1) Pinging

    2) Wireshark capture


Topology 2: (Mandatory)


    • Create and deploy the topology as show above.

    • Appropriately configure static routing entries in all three routers, so that server is reachable from client desktop.


Observations Required:

    • How many hops will client take to reach the server?

    • Observe the RTT and justify your observation.

    • While pinging, cut the link between Router1 and Router3. What will happen now?

Record these observations in your notebook. Upload the following screenshots in Edmodo.

    1) Pinging

    2) Wireshark capture