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GNS3 Lab: BGP - network backdoor, a way to prefer IGP over eBGP - Pierky's Blog
The network … backdoor command let you to prefer IGP over eBGP routing updates without changing the overall BGP administrative distance. Initially, R1 and R2 run an IGP (EIGRP) on the direct link (172.16.0.0/30). R1#show ip route | beg Gateway Gateway of last resort is not set 172.16.0.0/30 is subnetted, 2 subnets C 172.16.13.0 is …