An engineer configured a leak-map command to summarize EIGRP routes and advertise specifically loopback 0...

When you configure an EIGRP summary route, all networks that fall within the range of your

summary are suppressed and no longer advertised on the interface. Only the summary route is

advertised. But if we want to advertise a network that has been suppressed along with the

summary route then we can use leak-map feature. The below commands will fix the

configuration in this question:

R1(config)#access-list 1 permit 10.1.1.0 0.0.0.3

R1(config)#route-map Leak-Route permit 10 // this command will also remove the “route_map

Leak-Route deny 10” command.

R1(config-route-map)#match ip address 1