Hi everyone,Wish you have anice day!I have a lab as picture below. The lab request R5 just learn 1 row route 10.0.0.0/8 from ABR R1. How can I summary on R1 all subnets 10.0.0.0/8 behind it, I try configure on R1(config-router)#area 0 range 10.0.0.0 ...