DMVPN Phase 1:
--> Hub need to have static public ip address and Spokes can have dynamic public ip addresses.
--> Multipoint Gre tunnel on Hub & Point to Point Gre Tunnel on Spoke.
--> Summarization and Default Route Forwarding is supported on Hub Router.
--> Hub always change next hop ip address whenever it is forwarding the updates to spoke router.
--> NHRP Required for Spoke to Hub Resolution.
--> Spoke to Spoke dynamic tunnel establishment is not possible in DMVPN phase 1.
DMVPN Phase 2:
--> Hub need to have static public ip address and Spokes can have dynamic public ip addresses.
--> Multipoint Gre tunnel on Hub &Multi Point Gre Tunnel on Spoke.
--> Summarization and Default Route Forwarding is not supported on Hub Router.
--> Hub does not change next hop ip address whenever it is forwarding the updates to spoke router.
--> NHRP Required for Spoke to Hub Resolution as well as Spoke to Spoke Resolution.
--> Spoke to Spoke dynamic tunnel establishment is possible in DMVPN phase 2.
--> Multi Level Hierarchy works with Daisy Chaining ( Means if you have two hubs or more then the hub should be NHS as well as NHC).
DMVPN Phase 3:
--> Hub need to have static public ip address and Spokes can have dynamic public ip addresses.
--> Multipoint Gre tunnel on Hub &Multi Point Gre Tunnel on Spoke.
--> Summarization and Default Route Forwarding is supported on Hub Router.
--> Hub changse next hop ip address whenever it is forwarding the updates to spoke router.
--> NHRP Required for Spoke to Hub Resolution as well as Spoke to Spoke Resolution.
--> Spoke to Spoke dynamic tunnel establishment is possible in DMVPN phase 3.
--> Multi Level Hierarchy works without Daisy Chaining .
--> Hub need to have static public ip address and Spokes can have dynamic public ip addresses.
--> Multipoint Gre tunnel on Hub & Point to Point Gre Tunnel on Spoke.
--> Summarization and Default Route Forwarding is supported on Hub Router.
--> Hub always change next hop ip address whenever it is forwarding the updates to spoke router.
--> NHRP Required for Spoke to Hub Resolution.
--> Spoke to Spoke dynamic tunnel establishment is not possible in DMVPN phase 1.
DMVPN Phase 2:
--> Hub need to have static public ip address and Spokes can have dynamic public ip addresses.
--> Multipoint Gre tunnel on Hub &Multi Point Gre Tunnel on Spoke.
--> Summarization and Default Route Forwarding is not supported on Hub Router.
--> Hub does not change next hop ip address whenever it is forwarding the updates to spoke router.
--> NHRP Required for Spoke to Hub Resolution as well as Spoke to Spoke Resolution.
--> Spoke to Spoke dynamic tunnel establishment is possible in DMVPN phase 2.
--> Multi Level Hierarchy works with Daisy Chaining ( Means if you have two hubs or more then the hub should be NHS as well as NHC).
DMVPN Phase 3:
--> Hub need to have static public ip address and Spokes can have dynamic public ip addresses.
--> Multipoint Gre tunnel on Hub &Multi Point Gre Tunnel on Spoke.
--> Summarization and Default Route Forwarding is supported on Hub Router.
--> Hub changse next hop ip address whenever it is forwarding the updates to spoke router.
--> NHRP Required for Spoke to Hub Resolution as well as Spoke to Spoke Resolution.
--> Spoke to Spoke dynamic tunnel establishment is possible in DMVPN phase 3.
--> Multi Level Hierarchy works without Daisy Chaining .
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