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DMVPN Hub IP address change

I have a 2-Hub DMVPN setup with 10 spokes.  One hub in NJ and one in Australia.  I am migrating to NJ office to a new ISP and will obviously have an IP address change.  What is involved in changing the IP of the NJ router? 

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Hello On configuration front,

Hello

 

On configuration front, only the following to be done

NJ Router:

----------------

tunnel source to be changed to new IP address

IP address of the physical interface towards the IP & Routing

 

All Spoke Routers: in the tunnel

-----------------------

no Ip nhrp map multicast <old Physical IP at NJ>

no ip nhrp map <NJ tunnel IP> <old  Physical IP at NJ>

Ip nhrp map multicast <New Physical IP at NJ>

 ip nhrp map <NJ tunnel IP> <New Physical IP at NJ>

 

From the migration point of view, What I would suggest is start from one of the Spoke router and remove its configuration related to NJ and make sure that it works with Australia Hub, then you can do the migration of NJ router ( All other spokes should fall back to Australia) and Join the previous Spoke to test . If that is successful, you can plan for the migration of the all other spokes

 

Hope this helps

Harish.

 

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