Which VPN would be optimal and scalable for large enterprise network

10 pts.
Tags:
Branch Office networks
Cisco 3845
Layer 2
VPN security
WAN Connections
I have two core sites and 400+ branch network through Layer-2 Data Connectivity. Which VPN solution will be best for this network   Basic WAN Information:

[ULIST type="disc"> [ELEMENT class="MsoNormal">Have two core sites (Different Location)             Data Centre

            Disaster Recovery

[ULIST type="disc"> [ELEMENT class="MsoNormal">Data Centre WAN Equipments             2 CISCO3845-HSEC/K9 with 6 FE WAN interface

[ULIST type="disc"> [ELEMENT class="MsoNormal">Disaster Recovery WAN Equipments             1 CISCO3845-HSEC/K9 6 FE WAN interface

[ULIST type="disc"> [ELEMENT class="MsoNormal">Branch WAN Equipments             1 CISCO1941-SEC/K9 2 FE WAN interface

[ULIST type="disc"> [ELEMENT class="MsoNormal">Remote Site             400+ Branches

[ULIST type="disc"> [ELEMENT class="MsoNormal">service providers (Layer 2 Data Connectivity)              4 Service Providers connect with DC & DR

             2 Service Providers connect with each branch

[ULIST type="disc"> [ELEMENT class="MsoNormal">Bandwidth Thanks



Software/Hardware used:
CISCO3845-HSEC/K9 , CISCO1941-SEC/K9

Answer Wiki

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You should use DMVPN with EIGRP or OSPF routing protocol. It is scalable and once you deploy hub site, bringing up new site is really easy.

DMVPN is for site-to-site VPN. If you need to deploy remtoe access so users can access corp resources while travelling, you can use SSL VPN on your Cisco 3845.

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