• When advertising summary in EIGRP, a leak map can be used to throw in a more specific prefix if needed.
  • Can be used for traffic engineering.
  • Applied to a router via route map.

Configuration:

Prefix List

Route Map

EIGRP Summary Statement with Leak Map

The command ‘summary-address 10.20.0.0 255.255.0.0 leak-map leakmap‘ summarizes the 10.20.0.0 loopback IP addresses, and leaks the more specific 10.20.1.0/24 address to the EIGRP neighbor. The EIGRP neighbor’s routing table now looks like below:

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