Nexus 5k VPC , VPC peer link keep alive link
OSPF IA routes vs regular routes
BGP port , BGP vs Ibgp
BGP vs ospf
admin distance vs more specific routes
troubleshooting questions - you need to do this they will give you access to their lab
firewall packet tracer
firewall nat questions
Find out mac by ip address ( using sho ip route, show mac address table )
filter bgp routes
bgp neighbour not coming up - please configure them correctly