On SW2 we already have a default route generated from R3 in Task 3.10. This route is load balanced between SW3 and SW4. Upon recieving the BGP generated default NLRI from R1, S1 will mark it as best and also as a RIB failure. So, it will not use this route. The SG doesn't mention this at all. As a matter of fact, the SG shows the verification step with the BGP learned route in the routing table of SW2. Did I miss something?
Rack18SW2#show ip route
O*E2 0.0.0.0/0 [110/1] via 126.96.36.199, 00:33:31, Port-channel23
[110/1] via 188.8.131.52, 00:33:31, FastEthernet0/21
Rack18SW2#show ip bgp
Network Next Hop Metric LocPrf Weight Path
r>i0.0.0.0 184.108.40.206 0 100 0 i