At approximately 03:10 this morning we experienced what appears to be the culmination of a memory leak on one of our core routers which caused the Cisco Express Forwarding (CEF) table to crash on said router.
The problem was cleared by 06:10 this morning however there would have been up to a 3 hour window where traffic routed through London-3 (THN) would have been affected and customers connecting through this PoP may have experienced problems connecting to the internet as a result of this CEF pollution.
We are continuing to investigate this problem and will post a follow up as / when we have any more information.
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