What are the WAN capabilities for the sites? | Cole Valley and Fareham have diversely routed connectivity from BT and Virgin.
In addition, Cole Valley has diverse routing from Zayo and Fareham has diverse routing from NEOS Networks. |
Which providers are co-located already? | BT, Virgin and NEOS Networks present fibre into our Cole Valley and Fareham DCs and Zayo present fibre into Cole Valley. A number of other telcos provide services to our DCs using these ‘last mile’ fibre connections, including Colt, TalkTalk, Vodafone, M247, AT&T and Verizon. |
Do SCC have private inter-site capability? | The SCC Cole Valley and Fareham DCs are joined to the FluidOne backhaul network (FluidOne are SCC’s preferred telco aggregator). We currently have 2Gb of spare capacity that could be used between Cole Valley and Fareham. |
What is the resilience and diversity for the WAN capabilities? | Each DC has diverse routes (meaning that circuits from BT, Virgin and Zayo at Cole Valley, and BT, Virgin and NEOS Networks at Fareham) exit the DCs via different routes and then also terminate in different exchanges and are geographically physically separated. Both BT and Virgin offer varying levels of diversity, but the solution employed by BT that is most commonly used is RO2, which is independent circuits on separate geographical routes, terminating on separate NTEs in separate racks within each DC and also terminating in separate exchanges. Virgin’s solution, which is effectively the same type of solution is called ‘Assured Separation’. These solutions do not ‘auto failover’ as the 2 telco NTEs are not connected together. Failover would be managed at the LAN level. This provides the flexibility to be able to use circuits on both routes in an active / active state during normal operation and therefore the secondary route could be utilised day to day. If there was a failure on one of the routes then at the LAN level, all traffic would directed towards the active route. The secondary route could of course be left as passive and only utilised if the primary failed. |