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Vidhi Mujumdar
Cisco Employee
Cisco Employee


  Join the Discussion : Cisco Ask the Expert 


Webcast: DMVPN troubleshooting
(Live Webcast Tuesday June 7th, 2016 at 10 am Pacific/ 1 pm Eastern)

Dynamic Multipoint VPN (DMVPN) is a Cisco IOS/IOS-XE Software solution for building scalable IPsec Virtual Private Networks (VPNs). Cisco DMVPN uses a centralized architecture to provide easier implementation and management for deployments that require granular access controls for diverse user communities, including mobile workers, telecommuters, and extranet users.
Cisco DMVPN allows branch locations to communicate directly with each other over the public or private WAN or Internet but doesn't require a permanent VPN connection between sites. It enables zero-touch deployment of IPsec VPNs and improves network performance by reducing latency and jitter, while optimizing head office bandwidth utilization.  

This session provides some insight into the base components involved in DMVPN and the different phases of deployment (hub-spoke model v. dynamic full mesh). It will focus on the layered troubleshooting approach required when working on DMVPN-related network issues and how it can be used to troubleshoot commonly seen problems in the field.


    • DMVPN Phase 1/2/3 Overview
    • Deep Dive on Phase 3
    • Layered Troubleshooting Approach for DMVPN
    • Live Demonstration of Phase 3 Operation
    • Live Troubleshooting of Common DMVPN Issues
    • Best Practices

Featured Speakers


Frank DeNofa has been a Customer Support Engineer in the Technical Assistance Center VPN team in RTP since 2013. He has expertise in VPN technologies with a focus on site-to-site VPN solutions such as DMVPN, GETVPN, and FlexVPN. Frank holds a Bachelor's Degree in Applied Networking and Systems Administration with a focus on routing and security from Rochester Institute of Technology in Rochester, NY. His non-networking interests include hockey, CrossFit, and cooking.










Hamzah Kardame has been a Customer Support Engineer in the Technical Assistance Center Security team at Cisco since 2010. His area of expertise lies in the VPN space on both IOS/IOS-XE based platforms as well as on ASAs, focusing on VPN solutions such as DMVPN, GETVPN and FlexVPN, in addition to Public Key Infrastructure (PKI). He holds a CCIE certification in Security (#35596). Hamzah graduated with a Bachelor’s Degree in Electronics and Communication from PESIT at Bangalore, India. His other areas of interest include reading, soccer and traveling.



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Amal Ahmadov


In section 2 of DMVPN Phase 3 - Deep Dive slide page it was mentioned that  hub receives and forwards data packet on tunnel interfaces with the same NHRP Network-id. 

As far as I know there are no requirements that the NHRP network-ids must match on hub and spokes.

Please, correct if I am mistaken.

Best regards,


Vidhi Mujumdar
Cisco Employee
Cisco Employee

Hello Amal,

Please post the question on Ask the Expert event going on here :

Experts will review and reply.



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