RE: Flapping eigrp interface

Did you set the MTU to 1400 on both sides?

Tony Schaffran
Sr. Network Consultant
CCIE #11071
CCNP, CCNA, CCDA,
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-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
olumayokun fowowe
Sent: Tuesday, November 24, 2009 7:15 AM
To: Cisco certification
Subject: OT: Flapping eigrp interface

Hello all,

I have a challenge which I am trying to resolve. Below is the output of my
'show logg' and necessary config. What is the most likely cause for this,
and how do I resolve it.

Nov 24 15:37:32: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is down: retry limit exceeded
Nov 24 15:37:35: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is up: new adjacency
Nov 24 15:38:54: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is down: retry limit exceeded
Nov 24 15:38:55: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is up: new adjacency
Nov 24 15:40:14: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is down: retry limit exceeded
Nov 24 15:40:18: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is up: new adjacency
Nov 24 15:41:38: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is down: retry limit exceeded
Nov 24 15:41:41: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 192.x.y.78
(Tunnel1) is up: new adjacency

interface Tunnel100
 bandwidth 100000
 ip address 192.x.y.77 255.255.255.252
 ip mtu 1400
 ip bandwidth-percent eigrp 10 5
 load-interval 30
 tunnel source 192.x.y.73
 tunnel destination 172.x.y.74
 crypto map ABC_IPsec

router eigrp 100
net 192.x.0.0
no auto

Regards,

Mayokun

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Received on Tue Nov 24 2009 - 17:47:01 ART