In reply to Sunu Gopalan.

Hi Sunu -

Thank you for your interest. The ISR's have always been a highly reliable platform, and the 4451-X takes this up one more level.

The 4451-X supports a variety of built-in capabilities for fault tolerance as well as network high availability options. The 4451-X supports redundant power supplies as well as redundant cooling fans and storage all of which are hot-swappable. Power feeds, drives and moving fans are the most common failure points in any network device so building in redundancy goes a long way to improve network up time. For even greater resilience, the 4451-X supports standards-based network high-availability with features such as HSRP and VRRP.

From a module point-of-view, the built in server capability of the UCS E-Series supports additional redundancy in the form of RAID storage and hypervisor failover between modules. And, the Smartnet on the ISR covers the UCS E-Series server and hard disks at no additional cost.

Also, the new "service container" architecture allows IT admins to dedicate a set of resources for running each WAN service. This ensures that you can run multiple services like VPN, firewall, QoS, WAN opt, and more without one service impacting another or the overall router performance. This is one of the reasons this platform maintains a steady performance curve, even when additional services are added.

Hope that helps.

Regards,
Raakhee