Have a lab, and no previous practical experience

brownflamigo1 · 11-15-2007, 10:56 AM

Hello, I am kinda worried about the upcoming lab session, we havent studied anything about how to do it, but nevertheless, we will have as following. I really need some advice on where may be i can find some animation, or discussion, or some applet of how to do it. I know how OSPF and IPv4 forwarding works in theory, but...

Please suggest what to do, what to read. Thanks a lot.
Nik

This is it:

Quote:

In this project, you will first setup a small IPv4 network with static forwarding tables. In the second
step, you will enable the routing protocol OSPF and see how it reacts to link failures.

The network topology is shown in Figure 1. ping and pong are two Juniper J6300 while onion
and pepper are software routers running as XEN virtual machines on the XEN server veggie. The
routing software package you will use on these software routers is called quagga.

CANNOT INSERT HOW THE NETWORK IS CONNECTED

Figure 2 shows the layout of the ports on the J6300 routers and the configuration of the ports on
the Riverstone RS 3000 switch. The RS 3000 provides ports which connect to the software router
interfaces via VLANs. To setup the topology shown in Figure 1, you simply connect cables between
the Juniper routers and slot #1 in the Riverstone switch.

Problem 4.1: static IPv4 forwarding (10 points)
Below is a short description of the steps you should perform in order to setup static IPv4 forwarding:
1. Determine which IPv4 addresses should be assigned to the interfaces and define the forward-
ing tables that will establish connectivity in the network. You must use addresses from the
private 172.16.0.0/16 IPv4 prefix for this experiment. Familiarize yourself with the J6300 con-
figuration interfaces by checking the online documentation (http://www.juniper.net/). This
should be done as a preparation before the actual lab session.
2. Establish the topology shown in Figure 1 by plugging cables. Do not touch the ports which
are marked with a cross in Figure 2. Connect your laptops to the topology in such a way that
you can use your laptops to configure the routers and to test the network configuration. Feel
free to make use of the switches red, blue, yellow, and green.
3. Configure the interfaces on the Juniper routers and the virtual routers. Install the static
forwarding bases in the routers.
4. Verify the setup by using tools such as ping and traceroute. Develop a test plan which
ensures complete coverage.
5. As the final step, you should connect the network to the global Internet. The RS 3000 provides
an uplink port et.2.15 which has the IPv4 address 172.16.254.1. The RS 3000 expects that
the J6300 interface has the IPv4 address in the 172.16.254.1/24 subnet. (Note that the RS
3000 provides appropriate network address translation services for you to reach out into the
global Internet.)
All devices (routers, switches, hosts) are connected to a so called “management network”. By
plugging a notebook into the appropriate slots on the RS 3000 switch, you gain access to the
management network. This allows to configure the routers without having to use serial cables.
Problem 4.2: OSPF routing (10 points)
Below is a short description of the steps you should perform.
1. Assign IPv4 addresses to the router interfaces as described above. You must use addresses
from the private address range 172.16.0.0/16.
2. Configure the network interfaces and mark them as OSPF interfaces. Enable OSPF and check
that a suitable loop-free routing topology is being created.
3. Use a packet analyzer such as wireshark to capture the OSPF traffic and to analyze it.
4. Remove one of the cables (which is equivalent to bringing down a link) and see how OSPF
reacts to it. How does the new established routing topology look like?
5. How much time does OSPF need to establish a new loop-free routing topology? Which
parameters can be tweaked to influence the topology being established by OSPF?

ctkroeker · 11-15-2007, 02:06 PM

Find out. On LQ we don't do homework for students.
BTW., google probably has tons of stuff on this.
Happy searching!

brownflamigo1 · 11-15-2007, 02:09 PM

ok, thanks anyways

i just got kinda worried about it...