As part of our IWAN series I wanted to take a closer look into what trends are impacting the Service Providers. My previous blog talked about how Enterprises can use the CSR 1000V to migrate to the Cloud. This week I wanted to talk about how Service Providers are using the CSR to deliver services to their customers.
Historically Service Providers deliver services like routing, firewall and VPN to customers by installing multiple hardware products at the customer site. At the customer site the location where the customer and Service Providers network meet is referred to as the customer premise equipment or CPE. The hardware installed at the CPE is often specialized for different network functions, and the architecture and associated management systems are designed by the Service Provider. This approach provides reliable network services to business customers however it can become complex as more network services are added and it is not very flexible when it comes to adding new services. As a result when businesses demand more services or capacity, Service Providers can be slow to respond and will ultimately see an increased time-to-revenue.
Network Function Virtualization (NFV) aims to overcome these challenges by allowing network services to be moved, or instantiated, in various locations in the Service Provider network on demand and without the need for the installation of specialized hardware equipment. For NFV to work it requires industry vendors like Cisco to virtualize network functions like routers just like we did with the CSR 1000V. We took our IOS XE operating system from the Aggregation Services Router (ASR) 1000 which was already tried and tested in Service Providers networks and turned it into a virtual form factor that can be run on any off-the-shelf x86 server. Cisco has many more products that are in virtualized form factors and the list includes but is not limited to:
• Virtual Wide Area Application Services (vWAAS)
• Virtual Wireless LAN Controller (vWLC)
• Virtual Mobility Service Engine (vMSE)
• Virtual Security Gateway (VSG)
• Virtual Network Analysis Module (VNAM)
• Virtual Identity Services Engine (vISE)
• Virtual Adaptive Security Appliance (vASA)
• Nexus 1000v vSwitch (N1Kv)
The primary benefit of NFV is the ability to use the same data center equipment and management tools that Service Providers currently use for their internal networks to host and manage network functions for their customers. The new vCPE has a reduced hardware footprint, simplified infrastructure and requires less customization. Core network functionality shifts to the Service Provider network where the pooling of resources increases flexibility allowing them to deploy services faster and scale them according to customer demand.
The benefits to of NFV are significant, however the transition will take some time due to the complexity and size of Service Provider networks. Look out for more blog posts around NFV and the vCPE as I explore in more detail the challenges of moving to this new architecture. In the mean time I encourage you to download a new CSR case study about MiroNet AG, a Swiss Cloud and Infrastructure provider that is using the CSR to deliver new differentiated services to its existing customers while simultaneously attracting new customers.
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