Advanced Routing Configuration and BGP Implementation on GNS3

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ITNE3007
Advanced Routing
Assignment
Student Name: - Asim Uddin
Mohammed
Student ID: - As40275
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Contents
Objective.....................................................................................................................................................3
References.................................................................................................................................................12
Practical.....................................................................................................................................................13
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Objective
The International Travel Agency needs Internet for its internet related sales. For this company has
connection with two Internet service providers as ISP1 and ISP2. We need to configure BGP between
these routers
I. Step 1: Create the same design in GNS3 and then begin with configurations as shown below.
a. First assign the IP addresses
b. Then configure BGP on these routers (Eskandarpour et al, 2016).
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Use the PING command to check non-connectivity of ISP1 and ISP2
II. Step 2: now configure the MELBOURNE3 ROUTER and also connect it with ISPs using BGP.
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III. Step 3: Configure BGP on MELBOURNE3 router and then using the show ip route command to
display the routes learnt on this router.
Output of Show ip route command
Ping ISP1 and ISP2 loopbacks from MELBOURNE3.
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IV. Step 4: show ip bgp neighbor and show ip bgp outputs.
1. It means that it is a Valid path for a destination
2. ‘>’ Symbol signifies that it is a best path.
3. Router Id is displayed as : 192.168.1.1
4. BGP table version is 6
5. When we disable the loopback0 of ISP1 the BGP table version will be increased by 1
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6. As asked, again no shut Loopback0 of ISP1 and then apply the show ip bgp neighbors command
to check the neighbor state.
Neighbor state =Established
7. UP TIMER displayed : 00:44:15
V. Step 5: Distribute-list for Route-filtering
ISP1 and ISP2 are also sending and receiving each other’s loopback routes. They should only be able to
receive routes from MELBOURNE3 router. Using distribute-list we can do this.
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VI. Step 6: Default-routes for ISP1 and ISP2
Apply the default-static routes for ISP1 and ISP2 on MELBOURNE3 router.
We create two default static routes. One of them has AD as 210 and another one has 220. The route
with lower AD will appear in routing table. Use show ip route command for checking this (Eastwoodet al,
2016).
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Configure a loopback as LOOPBACK 200 on ISP1 and then check whether it is
reachable or not through the default static route we have configured
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VII. Step 7: Now set MELBOURNE3 ROUTER with a default network command towards ISP1 and ISP2
as backup ISP (Alumur et al, 2016).
For this, Remove the default static routes first
Then, advertise the loopback 210.210.210.0/24 network in BGP configuration of
ISP1. Then use the ip-default network command to set it as default network.
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In last, set the ISP2 as the backup for internet connection
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References
Alumur, S.A., Nickel, S., Saldanha-da-Gama, F. and Seçerdin, Y., 2016. Multi-period hub network design
problems with modular capacities. Annals of Operations Research, 246(1-2), pp.289-312.
Eastwood, E.K., López, E.H. and Drew, J.A., 2016. Population connectivity measures of fishery-targeted
coral reef species to inform marine reserve network design in Fiji. Scientific Reports, 6, p.19318.
Eskandarpour, M., Dejax, P., Miemczyk, J. and Péton, O., 2015. Sustainable supply chain network design:
an optimization-oriented review. Omega, 54, pp.11-32.
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