10 Gigabit networking in SOV & HEX

Over the weekend of January the 7th and January the 8th we upgraded our core routers in Sovereign House and Harbour Exchange. Previously Sovereign House had a 2x1GE bonded uplink into each router, with each router having 1G of transit and 1G of peering (different peering exchange and transit provider on each router). Now we have a 10GE ring around the two routers and the core switches and lots of spare 1G and 10GE ports on the routers so we can bring additional transit and peers online easily in the future.

The router upgrade was completed almost without issue, there was a brief period in the early hours of Sunday morning with incorrect configuration for one /24 in Sovereign House and our IPv6 gateway in Sovereign House was offline for an extended period because we hadn’t configured it to advertise correctly. Aside from those issues we were able to replace each router in succession relying on the redundancy provided by the other router to seamlessly fail over between them as they were replaced.

We’re happy to report that Cambridge customers didn’t observe a 12 hour outage with our Cambridge to Sovereign House connection on Friday 6th, everything correct rerouted via Harbour Exchange resulting only in a momentary blip when the connection failed catastrophically mid afternoon. Normal redundancy was restored in the early hours of Saturday morning after a large section of fibre had been replaced.