Cisco Cisco 4G LTE Enhanced High-Speed WAN Interface Cards for LATAM
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6. DMVPN over 4G LTE as a Primary WAN
For enterprise deployments with a large number of remote sites or branch offices, DMVPN is used. DMVPN
provides the scalability and manageability required by such large-scale deployments. This hub-to-spoke topology
also supports spoke-to-spoke traffic patterns. At startup, a branch-office (spoke) site establishes a DMVPN
connection to the hub site and establishes a routing protocol adjacency. Traffic between the spoke and hub
traverses this DMVPN connection. When traffic needs to flow between branch offices, DMVPN establishes a
spoke-to-spoke tunnel dynamically for more direct and efficient traffic forwarding.
(IGP) for dynamic routing updates between the DMVPN hub and spokes.
Figure 6. DMVPN over 4G LTE as Primary WAN
Configuration of Branch Office 1 as a DMVPN Spoke
!
crypto isakmp policy 10
hash md5
authentication pre-share
!
!ISAKMP policy for phase 1 negotiation
!
crypto isakmp key cisco123 address 0.0.0.0 0.0.0.0
!
!Preshared key for Hub, and remote DMVPN spokes