Hello,
We are facing a problem with eigrp neighborship between branches and HO in a DMVPN network.
The eigrp between several branch routers and HO router, is flapping all the time (most probably due to link issue).
However, at certain point the neighborship goes down and doesn't go up although the tunnel is up and there is reachability from both sides.
The neighborship doesn't go up unless we clear DMVPN or shut/no shut the tunnel interface.
During the problem, the traffic passes through Tunnel2(which is on a stable link) and the "show ip route" output doesn't show entries corresponding to Tunnel1(eigrp flapping)
HO Router 7200
#show log
Feb 8 08:12:20 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.17.254 (Tunnel1) is up: new adjacency
Feb 8 08:12:22 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.1 (Tunnel1) is up: new adjacency
Feb 8 08:12:45 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.2 (Tunnel1) is down: retry limit exceeded
Feb 8 08:12:49 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.2 (Tunnel1) is up: new adjacency
Feb 8 08:13:13 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.2 (Tunnel1) is down: stuck in INIT state
Feb 8 08:13:13 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.1 (Tunnel1) is down: stuck in INIT state
Feb 8 08:13:13 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.17.254 (Tunnel1) is down: stuck in INIT state
Feb 8 08:13:13 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.1 (Tunnel1) is up: new adjacency
Feb 8 08:13:14 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.17.254 (Tunnel1) is up: new adjacency
Feb 8 08:13:17 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.2 (Tunnel1) is up: new adjacency
Feb 8 08:14:24 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.1 (Tunnel1) is down: stuck in INIT state
Feb 8 08:14:24 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.16.2 (Tunnel1) is down: stuck in INIT state
Feb 8 08:14:24 Beirut: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.214.17.254 (Tunnel1) is down: stuck in INIT state
#sh ver
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.2(4)M4, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Thu 20-Jun-13 13:06 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
BR1274R1 uptime is 11 weeks, 1 day, 4 hours, 33 minutes
System returned to ROM by power-on
System restarted at 08:11:14 Beirut Thu Nov 10 2016
System image file is "flash0:c2900-universalk9-mz.SPA.152-4.M4.bin"
Last reload type: Normal Reload
Last reload reason: power-on
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco CISCO2911/K9 (revision 1.0) with 471040K/53248K bytes of memory.
Processor board ID FCZ174170WX
3 Gigabit Ethernet interfaces
2 Serial(sync/async) interfaces
1 terminal line
1 Virtual Private Network (VPN) Module
8 Voice FXO interfaces
4 Voice FXS interfaces
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash 0 (Read/Write)
License Info:
License UDI:
-------------------------------------------------
Device# PID SN
-------------------------------------------------
*0 CISCO2911/K9 FCZ174170WX
Technology Package License Information for Module:'c2900'
-----------------------------------------------------------------
Technology Technology-package Technology-package
Current Type Next reboot
------------------------------------------------------------------
ipbase ipbasek9 Permanent ipbasek9
security securityk9 Permanent securityk9
uc uck9 Permanent uck9
data None None None
Configuration register is 0x2102
