
To configure a [DMVPN](/dmvpn) [DMVPN dual hub single cloud](/dmvpn-dual-hub-single-cloud) setup with redundant links at the spokes, keep the following considerations in mind:

1. **Single Tunnel Interface**: dual-hub single-cloud uses a single [mGRE](/mgre) tunnel, thus, you must create a single tunnel interface on each spoke using a [loopback interface](/routers-what-is-a-loopback-interface) as the source [tunnel](/gre-tunnel-addressing).  
2. **Routing Protocol**: Ensure the loopback address is reachable via your chosen [routing protocol](/routing-dynamic-routing-protocols).
3. **Protocol Choice**: 
   - [OSPF](/ospf) may not be ideal if you want to force a spoke to prefer one hub over another as it has limitations in this regard.
   - [EIGRP](/eigrp) offers more flexibility in preferring one hub or path over another, making it a better option for this setup.

This approach ensures proper redundancy and optimal routing in a DMVPN setup with dual hubs and a single cloud.

Links:

https://forum.networklessons.com/t/dmvpn-dual-hub-single-cloud/1328/55?u=lagapidis

https://networklessons.com/cisco/ccie-enterprise-infrastructure/dmvpn-dual-hub-single-cloud

DMVPN - Dual-Hub Single-Cloud with redundant spoke links config guidelines

Cisco SD-WAN vEdge Troubleshooting

Cisco SD-WAN vManage tail log

Cisco SD-WAN verify connectivity in Service VPN

Cisco SD-WAN viptela overlay network bringup

Cisco Validated Designs

Cisco's various lines of network switches

Class-Map - match statements

Classification and Marking of softphone applications

Cloud Service Model - Middleware

Cloud Service Model - Runtime

Cloud Service Models

Cloud service models - IaaS

Cloud service models - SaaS

CoPP - Best practices and operation

Configuration Register

Control Plane Policing (CoPP)

Control Plane Protection

DHCP - Broadcast flag

DHCP - Cisco Client ID format

DHCP - Client ID

DHCP - Commonly used options for IP phones

DHCP - DHCPv6 and the default gateway

DHCP - How a host is identified by a remote DHCP server

DHCP - Message Types

DHCP - Options

DHCP - Static binding use cases

DHCP - Understanding the Magic Cookie

DHCP - Using the MAC as the client ID on a Cisco device

DHCP Auto Image Update support

DHCP DORA process

DHCP Request message sent as broadcast

DHCP Snooping on a multi-switch topology

DHCP client options on Cisco IOS

DHCP decline message

DHCP excluding address on a Cisco IOS DHCP server

DHCP multiple IP helper-addresses

DHCP multiple servers on the same subnet

DHCP offer message sent as broadcast

DHCP option 82

DHCP relay agent

DHCP relay support for MPLS VPN

DHCP renewal rebinding

DHCP snooping rate limiting best practice

DHCP trusted and untrusted ports

DHCP

DHCPv6 - Modes of Operation

DHCPv6 - determining the IPv6 prefix assigned to an interface

DHCPv6 lease times on a Cisco IOS device

DHCPv6 relay agent

DMVPN - IPsec encryption order of operations

DMVPN - NHRP purge request

DMVPN - NHRP session attributes

DMVPN - OSPF and multiple areas

DMVPN - Phase 2 BGP peerings

DMVPN - Phase 2 EIGRP neighbor adjacencies

DMVPN - Phase 2 OSPF neighbor adjacencies

DMVPN - Phase 2 and multicast traffic

DMVPN - Phase 2 and summarization

DMVPN - Using the GRE tunnel key

DMVPN - What is the best routing protocol to use

DMVPN - mappings on hub and spokes

DMVPN - multicast commands

DMVPN - nhrp map and nhs command syntax

DMVPN - spoke redundancy

DMVPN - using a default route

DMVPN State of a tunnel

DMVPN dual hub dual cloud

DMVPN dual hub single cloud

DMVPN hierarchical topology

DMVPN redundancy options

DMVPN with more than two hubs

DMVPN

DNS - Authoritative Flag

DNS - Authoritative Server

DNS - Caching

DNS - Recursive Resolver

DNS - What is a delegation zone

DNS - stub zone

DNS - understanding zones

DNS cache windows PC

DSL - Asymmetric Digital Subscriber Line (ADSL)

DTP - Sending of Frames

DTP - best practice to disable

DTP - how to disable

Decrypt IPSec ESP traffic with Wireshark

Demarcation point

Difference between per-prefix LFA and per-link based LFA

Differences between CCIE and CCDE lab exams

Diffserv recommended configuration

Distribute-lists - using route maps to set attributes

Distribute-lists and named extended ACLs

ECMP Multicast Routing Cisco Nexus Switches

EEM - action mail

EEM - exit status variable

EEM Cisco Embedded Event Manager

EEM Matching a string within CLI output

EEM sync and skip keywords