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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) · Cisco
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Option A - Add static route for R2 loopback on R1 and redistribute. This will be great, but by default only connected and summary addresses are advertised from stub router by the default stub router command. Option B - Use leak map on R1 .... - The only one that makes the stub configuration work. Because you configure a leak-map on R1, after this, every neighboring rotuer will get the 2.2.2.2/32 prefix. The distribute list wouldn't be neccessary, but it doesn't break the connectivity for 2.2.2.2 so it works. Option C - Use leak map on **R3** that .... - This would be great, if this were on R1, but if you configure this on R3, you don't get the results you wanted. Option D - After this, R2s loopback will not be reachable from R1s neighbors *R1* ip prefix-list LEAK seq 5 permit 2.2.2.2/32 route-map LEAK permit 10 match ip address prefix-list LEAK router eigrp 10 distribute-list route-map LEAK out GigabitEthernet0/1 network 0.0.0.0 eigrp stub connected summary leak-map LEAK
Answer is C. For A to work you need to change the eigrp stub to include static and it only says that it is a stub. B does not work with distribute list. I labbed C and it works using a leak map. ip prefix-list LIST1 permit 2.2.2.2/32 route-map MAP permit 10 match ip address prefix-list LIST1. ROUTER EIGRP 1 eigrp stub leak-map MAP
B is correct