EIGRP summarization and Default Route

EIGRP supports summarization at the interface level anywhere throughout the topology






R2(config-if)#int f0/0
R2(config-if)#ip summary-address eigrp 100 2.2.2.0 255.255.248.0
01:53:34.283: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 12.1.1.1 (FastEthernet0/0) is resync: summary configured


Default Summary
R2(config-if)#ip summary-address eigrp 100 0.0.0.0 0.0.0.0