Symptom

# show clock 09:01:36.172 UTC Wed Jul 15 2020 <<<<<<<<< Time source is Hardware Calendar # clock set 05:00:00 15 july 2020 <<<<<<<< modify the time to the past cause the eigrp neighbor flapping Wed Jul 15 05:00:00 UTC 2020 # terminal monitor 2020 Jul 15 05:00:12 SWITCH %EIGRP-5-NBRCHANGE_DUAL: eigrp-1 [3813] (default-base) IP-EIGRP(0) 1: Neighbor 10.x.x.x (Ethernet1/XX) is down: Interface Goodbye received 2020 Jul 15 05:00:17 SWITCH %EIGRP-5-NBRCHANGE_DUAL: eigrp-1 [3813] (default-base) IP-EIGRP(0) 1: Neighbor 10.x.x.x (Ethernet1/XX) is up: new adjacency

Conditions

modify time to past time

Workaround

NONE

Further Problem Description