We have been encountering issues with LINX which result in some routes being "Black-holed" (i.e. going nowhere). The system normally handles this without any problem, identifying an infeasible route and removing from the routing table to allow alternative routes a chance. However we have identified an edge case where this does not happen. We plan to do a router upgrade today, as this issue is causing customers problems at present. This is one router and should be pretty seamless in that routing should go via other routers whilst it happens. However, there is a small risk of some routing blips during the process.
Upgrade completed