You are the senior networking engineer working for a huge comic book provider. Your network (AS 100) is connected to 2 different service providers and normally all traffic is being sent to your main ISP which is AS 300. However there is a certain network that is being sent to AS 200 which is your backup ISP. All traffic should be sent towards AS300, is this a cheap trick from your backup ISP to make more money? Or is there something else going on? Time for justice!
- All IP addresses are preconfigured as specified in the topology picture.
- Configure EBGP between AS 100 and AS 200.
- Configure EBGP between AS 100 and AS 300, make sure you have a neighbor relationship between router Spiderman and Superman as well as between router Spiderman and Ironman.
- Configure IBGP within AS 300.
- Make sure all neighbor relationships are working, advertise the correct networks in BGP to achieve full connectivity.
- Router Batman AND Superman have the same IP address on the loopback1 interface, advertise this in BGP on both routers.
- Ensure you can ping the 18.104.22.168 address from router Spiderman.
- Take a look at the BGP table with ‘show ip bgp’ on router Spiderman.
- Which path is being used for the 22.214.171.124 network?
- Configure router Ironman and Superman so they send a MED of 50 for the 126.96.36.199 network towards router Spiderman.
- Configure router Batman so it sends a MED of 150 for the 188.8.131.52 network towards router Spiderman.
- Check router Spiderman with ‘show ip bgp’ to see the changes you just made, if not do a ‘clear ip bgp *’
- Even though the MED from AS 300 is better, why is traffic towards 184.108.40.206 still being sent towards AS 200?
- Configure router Spiderman so traffic towards 220.127.116.11 is sent towards AS 300, the only attribute you are allowed to change is MED.
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