%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 20.20.20.2 (Vlan20) is down:

retry limit exceeded

%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 10.10.10.2 (Vlan10) is down:

retry limit exceeded

pastikan PC bisa mengakses IP 3.3.3.3 jika interface s2/0 pada R2 down

keterangan : teknologi yang digunakan HSRP