--> DMVPN is point to multipoint layer 3 overlay vpn which allows direct spoke the spoke communication.
--> DMVPN uses following technologies in order to work
i) MGRE
ii) NHRP
iii) IPSEC
--> DMVPN allows spokes to use dynamic public ip addresses.
--> DMVPN uses mainly two components
i) NHS ( Next Hop Server ) ---- Hub
ii) NHS ( Next Hop Client) --- Spoke
--> Each and Every Spoke manually need to register with Hub by using NHRP Messages.
--> There are two types of addresses are used in DMVPN
i) Public IP address -- NBMA Address --- Overlay Address
ii) Private IP address --Tunnel Address --- Underlay Address
--> Each and Every Spoke sends the information about his Public IP Address & Tunnel Address Via NHRP Register Message to the Hub.
--> DMVPN can be implemented in Three phases
i) DMVPN Phase 1 ( Hub - MGRE , Spoke - Gre)
ii) DMVPN Phase 2 ( Hub - MGRE , Spoke - MGre)
iii) DMVPN Phase 3 ( Hub - MGRE , Spoke - MGre)
--> IS-IS is not supported whenever we are using routing via DMVPN
--> DMVPN uses following technologies in order to work
i) MGRE
ii) NHRP
iii) IPSEC
--> DMVPN allows spokes to use dynamic public ip addresses.
--> DMVPN uses mainly two components
i) NHS ( Next Hop Server ) ---- Hub
ii) NHS ( Next Hop Client) --- Spoke
--> Each and Every Spoke manually need to register with Hub by using NHRP Messages.
--> There are two types of addresses are used in DMVPN
i) Public IP address -- NBMA Address --- Overlay Address
ii) Private IP address --Tunnel Address --- Underlay Address
--> Each and Every Spoke sends the information about his Public IP Address & Tunnel Address Via NHRP Register Message to the Hub.
--> DMVPN can be implemented in Three phases
i) DMVPN Phase 1 ( Hub - MGRE , Spoke - Gre)
ii) DMVPN Phase 2 ( Hub - MGRE , Spoke - MGre)
iii) DMVPN Phase 3 ( Hub - MGRE , Spoke - MGre)
--> IS-IS is not supported whenever we are using routing via DMVPN
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