issue with DMVPN

[thilinar8]

Hi,

we had a DMVPN solution running almost two years without any issues. But, from Last week suddenly, it went down and couldn't make it work again.

01. From HUB Router, can ping the DMVPN SPOKE Tunnel IP, not the Remote LAN

02. DMVPN SPOKE can ping any interface on HUB router. But, trace drops at HUB router to any network.

03. DMVPN learns all the routing through EIGRP

04. DMVPN sites subnets updated on the network through Dynamic routes

05. DMVPN Spokes can't ping their own tunnel IP

can anyone, please help me to solve this issue.

Thanks in advance

[balaji.bandi]

If it was working, what was the change ?

You need to provide more information, like some network topo / DMVPN Option1 /2/ 3  ? is this Single or Dual  HUB  ?

Looking at your problem (may not help but simple diagnosis the issue) :

1. Is the configuration is ok ?

2. Check the ACL ( for the interesting traffic)

and follow some outputs here : ( provide this information to forum to help better)

sh clock
crypto logging session
show run interface tunnel 1(where this is your number)
show crypto isakmp sa
show crypto ipsec sa peer IP
show ip nhrp nhs
show ip eigrp neighbor

Hope this information help to start with ?

BB