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Community Member

If hub-router which has static public IP address shut down in DMVPN...

Hi,

I'm going to design a DMVPN full-mesh network same as following topology.

82589.jpg

If hub-router which has static public IP address shut down, would another three routers be able to keep their tunnels?

Regards,

Tomoyuki

3 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Re: If hub-router which has static public IP address shut down i

depends on whic hphase of dmvpn u r running

what code r u running on your routers

Cisco Employee

Re: If hub-router which has static public IP address shut down i

assuming you have a pretty decent code

i do not think anything would happen, the tunnel will continue to be up

but just make sure that the duration of downtime is less than the time remaining for the tunnel to reestablish

Silver

Re: If hub-router which has static public IP address shut down i

The answer is no, as the nhrp mappings will change and there will have to be a change in the hub. You could configure a dual hub scenario where if one goes down the other can take over.

http://www.cisco.com.az/en/US/docs/solutions/Enterprise/WAN_and_MAN/VPNLoad/ch8_Dual_external_docbase_0900e4b180ac09d0_4container_external_docbase_0900e4b180ace543.html#wp1038638

5 REPLIES
Cisco Employee

Re: If hub-router which has static public IP address shut down i

depends on whic hphase of dmvpn u r running

what code r u running on your routers

Cisco Employee

Re: If hub-router which has static public IP address shut down i

assuming you have a pretty decent code

i do not think anything would happen, the tunnel will continue to be up

but just make sure that the duration of downtime is less than the time remaining for the tunnel to reestablish

Community Member

Re: If hub-router which has static public IP address shut down i

Hi jathaval,

Thank you for your good help.

I got it,

Next question.

After the hub-router has downed, the mesh tunnel will be composed of three spoke-routers which have public dynamic IP address.

Once one of the three routers has reloaded and the IP address has changed,  can they keep their mesh tunnel without hub-router whitch has public static IP address?

If the answer is NO, can I prepare anything for this?

For example, replace one of the public dynamic IP by static one in order to put second static-IP-router in the DMVPN topology.

Regards,

Tomoyuki

Silver

Re: If hub-router which has static public IP address shut down i

The answer is no, as the nhrp mappings will change and there will have to be a change in the hub. You could configure a dual hub scenario where if one goes down the other can take over.

http://www.cisco.com.az/en/US/docs/solutions/Enterprise/WAN_and_MAN/VPNLoad/ch8_Dual_external_docbase_0900e4b180ac09d0_4container_external_docbase_0900e4b180ace543.html#wp1038638

Community Member

Re: If hub-router which has static public IP address shut down i

Super!!

Thank you for your great help!

I'll try this scenario.

Regards,

Tomoyuki

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