Overview

A network service chaining (SC or SFC), is a capability that uses SDN capabilities to create a service chain of connected network services and connect them in a virtual chain. This capability can be used by SP to set up catalogs of connected services that enable the use of a single network connection for many services, with different characteristicsWhen users use CCVPN services, they usually want service providers to provide secure, fast and stable network services. In order to implement the above capabilities, the service provider usually connects the traffic to a service node such as a firewall or a load balancer. The traditional implementation is to manually adjust the policy of the device in the entire forwarding path, so the deployment is very complicated. The SFC service capability based on the CCVPN can reduce the coupling between the service and the device, so that the user does not need to perceive the underlying physical device. When the underlying physical network topology changes, the deployment and activation of the service node are not affected.

Dublin Goals

1. Enhancements to Information & Data Model - Extend CCVPN IM &DM for SFC services
2. SFC Activation/Configuration -  enable SFC awareness when provisioning and operations a NS
3. Direct Service Recovering - Implementation of DR service across domains to provide fine granularity management during the elapse time
4. Recovering Status Notification - Notify to service administrators that the Service has been recovering or progress in the service bus

5. Smart workload balancing - smart optimization and selection when recovering for connection reliability and efficiency

6. Future Releases (El Alto and beyond)
   
   1. Intent programming based trigger and receiver
   2. Predicability based optimization
   3. VPN as a service

...