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Beginner

Eigrp neigborship flaps on dmvpn

hi,

We have DMVPN tunnels configure and eigrp running on DMVPN.

From last one week i have seeing logs message that eigrp is flapping on dmvpn neighbors.Link between the 2 sites is stable

Kindly advise show ver is attached from the switch

Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T7, RELEASE SOFTWARE (fc3)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2008 by Cisco Systems, Inc.

Compiled Wed 13-Aug-08 17:09 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

AJM-RTR-2811 uptime is 18 weeks, 3 days, 23 hours, 51 minutes

System returned to ROM by power-on

System restarted at 16:09:13 UTC Thu Aug 16 2012

System image file is "flash:c2800nm-advipservicesk9-mz.124-15.T7.bin"

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 2811 (revision 53.51) with 249856K/12288K bytes of memory.

Processor board ID FHK1043F2BG

2 FastEthernet interfaces

4 ISDN Basic Rate interfaces

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

6 REPLIES 6
Enthusiast

Re:Eigrp neigborship flaps on dmvpn

Is the tunnel going up/down? How you running this with Ipsec over the internet? If so are you experiencing problems with your internet connection? Is there any good information in the logs, or any recent config changes?


Sent from Cisco Technical Support Android App

-- CCNP, CCIP, CCDP, CCNA: Security/Wireless Blog: http://ccie-or-null.net/
Beginner

Eigrp neigborship flaps on dmvpn

thanks for your reply.

Nope its lease line and the link is stable below is DMVPN tunnel config

interface Tunnel1

description ++++ Primary DMVPN Cloud ++++

bandwidth 2048

ip address 172.16.18.30 255.255.255.0

no ip redirects

no ip unreachables

no ip proxy-arp

ip mtu 1500

ip hello-interval eigrp 100 10

ip hold-time eigrp 100 30

no ip next-hop-self eigrp 100

ip authentication mode eigrp 100 md5

ip authentication key-chain eigrp 100 EIGRP

ip nhrp authentication PMaouA63

ip nhrp map 172.16.18.1 172.16.16.6

ip nhrp map multicast 172.16.16.6

ip nhrp map 172.16.18.2 172.16.16.2

ip nhrp map multicast 172.16.16.2

ip nhrp network-id 101

ip nhrp holdtime 60

ip nhrp nhs 172.16.18.1

ip nhrp nhs 172.16.18.2

ip tcp adjust-mss 1360

no ip split-horizon eigrp 100

tunnel source FastEthernet0/0

tunnel mode gre multipoint

tunnel key 1001

tunnel protection ipsec profile DMVPNPROFILE shared

Beginner

Eigrp neigborship flaps on dmvpn

just to add on above the tunnel is stable.its only eigrp which is flaping

Enthusiast

Eigrp neigborship flaps on dmvpn

I'll assume EIGRP is running AS 100.

If you debug eigrp does that provide any useful information?


--
CCNP, CCIP, CCDP, CCNA: Security/Wireless
Blog: http://ccie-or-null.net/

-- CCNP, CCIP, CCDP, CCNA: Security/Wireless Blog: http://ccie-or-null.net/
Beginner

Eigrp neigborship flaps on dmvpn

Any body find the same issue and found any bug in the IOS related to the issue.

Thanks

Highlighted

Eigrp neigborship flaps on dmvpn

Please ask your ISP if they facing any L2 connectivity issue in cloud, since this is Lease-Line connection but still there could be some connectivity issue at ISP edge if both remote sides A&B are stable. flapping of EIGRP has many reason, it could be connectivity issue, SIA etc.

Did you see any abnormal logs on device or in Syslog if so?

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