The aim of this assignment is that you use and understand the operation of BGP in a simple network.
The Juniper laboratory remains as configured for part B- Network A and Network B. You are still assigned to the same side. There are now two routers connected as ISPs and they do not have static routes to your networks. Instead they are configured as BGP peers.
You should use the same addresses and OSPF configuration you used for part A. You will need to delete your static default route though.
The new lab network diagrams may be found here
Two of the routers in each side are connected to the routers of ISP-A and ISP-B. You should configure the appropriate interfaces on both these routers with the External IP addresses you have been assigned below. Configure them to use BGP and peer with the ISP routers. You will also need to configure an iBGP session between your two routers.
Then you need to use policy statements to import all the BGP routes into the OSPF database and ensure that they are distributed via OSPF to the other routers. This is, in general, not good practice but is being used here to simplify the configuration required.
Your directly connect ISPs offer transit to a third ISP - ISP-C. Ensure that you can reach ISP-C. You have determined that ISP-B has the lowest cost connection to ISP-C. Modify your BGP config to make traffic from any of your routers to ISP-C transit ISP-B in preference to ISP-A.
You have been assigned to use sides of the lab as listed below. You should not have access to routers other than the two in the side you have been assigned.
| Student ID. | ISP-A Gateway Address. | ISP-B Gateway Address. | AS Number. | Reserved Date. |
|---|---|---|---|---|
| 1032681 | 192.168.33.1/24 | 192.168.32.1/24 | 64501 | 4 June |
| 1032708 | 192.168.33.2/24 | 192.168.32.2/24 | 64502 | 3 June |
| 1046585 | 192.168.33.3/24 | 192.168.32.3/24 | 64503 | 2 June |
| 1028323 | 192.168.33.4/24 | 192.168.32.4/24 | 64504 | 29 May |
| 1036258 | 192.168.33.5/24 | 192.168.32.5/24 | 64505 | 28 May |
| 1055737 | 192.168.33.6/24 | 192.168.32.6/24 | 64506 | 27 May |
| 1049481 | 192.168.33.7/24 | 192.168.32.7/24 | 64507 | 26 May |
| Student ID. | ISP-A Gateway Address. | ISP-B Gateway Address. | AS Number. | Reserved Date. |
|---|---|---|---|---|
| 1033491 | 192.168.34.1/24 | 192.168.35.1 | 64508 | 4 June |
| 1059536 | 192.168.34.2/24 | 192.168.35.2 | 64509 | 3 June |
| 1046563 | 192.168.34.3/24 | 192.168.35.3 | 64510 | 2 June |
| 1056985 | 192.168.34.4/24 | 192.168.35.4 | 64511 | 29 May |
| 1067131 | 192.168.34.5/24 | 192.168.35.5 | 64512 | 28 May |
| 1049066 | 192.168.34.6/24 | 192.168.35.6 | 64513 | 27 May |
| 1046593 | 192.168.34.7/24 | 192.168.35.7 | 64514 | 26 May |
Use of the lab is "first come, first served" on dates not listed above.
Demonstrate the answer to each of the following questions using output from at least one of the routers you have configured.
Show that all your routers can reach all the ISPs when the router interface connected to ISP-A is down and again when the router interface to ISP-B is down.
Demonstrate the effect of your traffic engineering configuration. Show the path each router uses to access ISP-C before and after applying this configuration. Show the BGP routes to each ISP before and after applying this configuration. With the configuration applied configure the interface connected to ISP-B down and show that ISP-C is still accessable by all routers.
Your assignment must be submitted in electronic form using Moodle. Do not submit anything physical. You may submit either a single file or an archive (e.g. made using tar) containing multiple files.
Your submission must include full router configurations for all routers configured, and the answers to the questions above illustrated by reference to output from the routers. To repeat, you must in each case demonstrate using router output that an answer is true. Marks will not be given for answers without demonstration.
NOTE: You can (just) pass this assignment without writing the traffic engineering config so make sure your base BGP config works and answer the questions related to that first. If you do not then get a chance to write and test the traffic engineering config write a description of the technique you would use to achieve the results described for partial marks.
Late submissions will not be graded without a mitigating Doctor's certificate. If you know ahead of time that you will not be able to meet the deadline, pelase see me as soon as possible so that other arrangements may be made. The day before may not count as "ahead of time". If you are not able to provide complete answers, submit what you do have. Some marks are better than no marks.
