debug EIGRP fsm (finite state machine)

R2#debug eigrp ?
Autonomous System
fsm EIGRP Dual Finite State Machine events/actions
neighbors EIGRP neighbors
nsf EIGRP Non-Stop Forwarding events/actions
packets EIGRP packets
transmit EIGRP transmission events
vrf Select a VPN Routing/Forwarding instance

R2#sh debug
EIGRP:
EIGRP FSM Events/Actions debugging is on

NO SHUT EIGRP INTERFACE:
R2(config-if)#no shut
R2(config-if)#
*Mar 1 00:08:17.687: DUAL: dest(1.1.1.0/24) not active
*Mar 1 00:08:17.687: DUAL: rcvupdate: 1.1.1.0/24 via Connected metric 281600/0
*Mar 1 00:08:17.691: DUAL: Find FS for dest 1.1.1.0/24. FD is 4294967295, RD is 4294967295 found
*Mar 1 00:08:17.691: DUAL: RT installed 1.1.1.0/24 via 0.0.0.0
*Mar 1 00:08:17.691: DUAL: Send update about 1.1.1.0/24. Reason: metric chg
*Mar 1 00:08:17.695: DUAL: Send update about 1.1.1.0/24. Reason: new if
*Mar 1 00:08:19.651: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 00:08:19.683: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 1.1.1.1 (FastEthernet0/0) is up: new adjacency
*Mar 1 00:08:20.651: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

ADD ROUTE TO NEIGHBOR ROUTER:
R2#
*Mar 1 00:09:50.803: DUAL: dest(100.0.0.0/8) not active
*Mar 1 00:09:50.803: DUAL: rcvupdate: 100.0.0.0/8 via 1.1.1.1 metric 409600/128256
*Mar 1 00:09:50.803: DUAL: Find FS for dest 100.0.0.0/8. FD is 4294967295, RD is 4294967295 found
*Mar 1 00:09:50.807: DUAL: RT installed 100.0.0.0/8 via 1.1.1.1
*Mar 1 00:09:50.807: DUAL: Send update about 100.0.0.0/8. Reason: metric chg
*Mar 1 00:09:50.807: DUAL: Send update about 100.0.0.0/8. Reason: new if

WITH DEBUG IP ROUTING just for kicks:
R2#debug ip routing
IP routing debugging is on
R2#sh deb
R2#sh debugging
IP routing:
IP routing debugging is on
EIGRP:
EIGRP FSM Events/Actions debugging is on

R2#
*Mar 1 00:12:12.895: DUAL: dest(10.0.0.0/8) not active
*Mar 1 00:12:12.895: DUAL: rcvupdate: 10.0.0.0/8 via 1.1.1.1 metric 409600/128256
*Mar 1 00:12:12.895: DUAL: Find FS for dest 10.0.0.0/8. FD is 4294967295, RD is 4294967295 found
*Mar 1 00:12:12.899: RT: add 10.0.0.0/8 via 1.1.1.1, eigrp metric [90/409600]
*Mar 1 00:12:12.899: RT: NET-RED 10.0.0.0/8
*Mar 1 00:12:12.899: DUAL: RT installed 10.0.0.0/8 via 1.1.1.1
*Mar 1 00:12:12.903: DUAL: Send update about 10.0.0.0/8. Reason: metric chg
*Mar 1 00:12:12.903: DUAL: Send update about 10.0.0.0/8. Reason: new if

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