Two Dual DMVPN with Dual Hubs

[charl]

Hi ,

Is a design with  2 dual DMVPN's with each with Dual Hubs a supported CISCO DMVPN configuration ?

Each spoke router will have 4 mgre tunnel interfaces, 2  to one DMVPN and 2 to another DMVPN. The Head end sites are not connected.

Topology:

2 Head end sites each with a DUAL DMVPN and Dual hubs.

100 Spoke sites

regards

charl

[Bastien Migette]

Hi,

You can perfectly have 2 DMVPN and allowing failover using the routing protocol, plus having a dual hub configuration, but you do not have to have 4 interfaces per spoke, as you can set up multiple NHS entry (the hub) in the tunnel interface.

Have a look on this (the spokes configuration):

http://www.cisco.com/en/US/tech/tk583/tk372/technologies_white_paper09186a008018983e.shtml#dualhubs

However, you need to have IP Connectivity between the hub as in a dual hub topology each hub is referring the other hub as a NHS so that if it fail he can still lookup the spoke using the mapping from the other hub.

Regards,

Bastien