Pros and Cons of converting of MX One Arm concentrator mode to Routed Concentrator

[mr_newbie]

Hi Experts,

May I seek your advice regarding the pros and cons of converting one of our MX from One Arm concentrator mode to Routed Concentrator mode.

[DarrenOC]

Good morning @mr_newbie 

Please take a read through the below document:

https://documentation.meraki.com/MX/Deployment_Guides/VPN_Concentrator_Deployment_Guide#Operating_Mo...

[MyHomeNWLab]

The mode of the MX is necessarily determined by its purpose (use case).
Therefore, I think it is best to avoid discussing the superiority or inferiority of each mode in a myopic way.

To benefit from the redundancy provided by DC-DC Failover, it must be a One Armed Concentrator.
Therefore, when redundant Primary and Secondary DCs are used in a corporate network, the DC side must use the

One Armed Concentrator.

  Datacenter Redundancy (DC-DC Failover) Deployment Guide - Cisco Meraki
  https://documentation.meraki.com/MX/Deployment_Guides/Datacenter_Redundancy_(DC-DC_Failover)_Deploym...

Routed Mode is suitable for accommodating Internet connections at branch offices.
To put it another way, One Armed Concentrator cannot accommodate Internet connections.