Advanced Routing Protocols and Network Configuration in GNS3

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ITNE3007
Advanced Routing
Assignment
Student Name: Haseeb Ahmed
Student ID: Ha39932

Contents
Scenario...........................................................................................................................................2
Step 1: Build and configure the network in GNS3..........................................................................3
Step 2: configure the MELBOURNE3 ROUTER...........................................................................5
Step 3: Configure BGP on MELBOURNE3, ISP1 and ISP2 router...............................................6
Step 4: Use of show ip bgp & show ip bgp neighbors commands..................................................8
Step 5: Apply Distribute-list for Route-filtering...........................................................................10
Step 6: Set the Primary and Secondary ISP on MELBOURNE3 router with the use of Default
static routes as................................................................................................................................11
Step 7: Set primary route for ISP1’s loopback network 210.210.210.0/24 using ip default-
network command.........................................................................................................................13
1

Scenario
The International Travel Agency is using Internet services for its work. It has two internet
connections from ISP1 and ISP2 respectively. The routes between these three routers are shared
through the BGP protocol.
2

Step 1: Build and configure the network in GNS3
a. Give the IP addresses to the directly connecting links of ISP1 and ISP2 to MELBOURNE3
router. Assign IP addresses (Abro, 2018) and create loopbacks as shown
Use the PING command to check non-connectivity of ISP1 and ISP2
Now check that ISP1 isn’t able to reach ISP2 (Castillo, 2018).
3

4

Step 2: Configure the MELBOURNE3 ROUTER.
5

Step 3: Configure BGP on MELBOURNE3, ISP1 and ISP2 router.
Use the show ip route command and display the routes.
6

#show ip route command
Verify connectivity of MELBOURNE3 router with loopbacks of both ISPs (Mohtasin, 2016).
7

Step 4: Use of show ip bgp & show ip bgp neighbours commands
1. This symbol represents any Valid route for a destination.
2. ‘>’ this symbol means that this path is best route to reach a destination. If it is combined with
* then it will mean that it is a BEST and VALID path for a destination.
3. Router Id= 192.168.1.1
4. BGP table version= 7
5. When we disable the loopback0 of ISP1 using shut command under loo0 and then the BGP
table version will get increased by 1 (Nixon, 2016).
8

6. Now, apply no shut under Loopback0 of ISP1 and then check whether the BGP neighbour
state is established or not using sh ip bgp neighbors command (Imran, 2018).
Neighbor state =Established
9

7. UP TIMER = 00:13:17
10

Step 5: Apply Distribute-list for Route-filtering
The ISP1 and ISP2 will exchange their loopback0 routes after all these configurations. Stop these
routes to appear in their routing tables using Distributive-list
Checking ISP2’s loopback route on ISP1 (Yang, 2015).
11