We didn’t find a more interesting topic than BGP to start with.
In this topic we will be covering some BGP features as Route Reflectors, Multihoming, Transit-AS, influencing route selection using Local Preference and MED, and Route Aggregation.
Topology:
Tasks:
1- Configure an IGP to achieve full reachability inside AS 200.
2- Configure RR to act as a Route Reflector for all router inside AS 200.
3- Use Loopback interfaces for all IBGP speaking routers.
4- Configure EBGP between [R1, ISP1] [R2, ISP2].
5- Ensure EBGP reachability to all IBGP speaking routers without advertising external links subnets.
6- Ensure that ISP1 is the upstream for AS 200 and ISP2 is the downstream for AS 200.
7- Aggregate the 30.1.0.0/24 & 30.2.0.0/24 address spaces to be 30.0.0.0/16 when exiting AS 300.
Verifications:
1- To verify full EBGP reachability, ping loopback interfaces of IBGP routers inside AS200.
2- To verify that ISP1 is the upstream for AS200, traceroute any loopback interface inside AS101 from AS200.
3- To verify that ISP2 is the downstream for AS200, traceroute any loopback interface inside AS200 from AS101.
3- To verify that Transit-AS, ping from AS300 to AS101 and vice versa.
Solution:
You will find below the detailed physical connections and the routers configuration files:
Enjoy !!
