300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

EIGRP automatic summarization can advertise the distinct 172.16.1.0/24 and 172.16.2.0/24 networks as a common classful summary, allowing R2 to load-share packets for that summary toward R1 and R3. A static route for the specific /24 containing 172.16.2.7, directed to R3, wins by longest-prefix match and prevents traffic for that host from being sent toward R1. The administrative distance of 254 makes the static route floating if an equivalent dynamic /24 route later becomes available. Cisco documents that EIGRP auto-summarization occurs at major-network boundaries and that no auto-summary disables it.