Congestion problems at both the London Internet Exchange (LINX) and from within BT's 21CN and 20CN networks are causing speed and latency problems for customers of broadband ISPs in the UK. The situation with LINX in particular is known to have impacted a number of ISPs during Sunday and Monday after a congestion issue between Telehouse East and Telehouse North cropped up.

It's understood from LINX that "two 10Gb ports on switch16 (Telehouse East) are not forwarding traffic but are receiving traffic" and needed to be replaced, which should have occurred late last night. There was some disruption earlier this morning but it is hopefully now improving.

Elsewhere broadband provider AAISP reports that there continue to be "serious issues within BT and are definitely affecting many ISPs", especially with the operators newest 21CN platform. We heard many gripes about this last year from ISPs and it seems not to be going away. If the BT service to ISPs runs into trouble then it is the providers that typically take all the blame.


This is not isolated to a single ISP and many that make use of the related BT platforms are being affected. Some of the problems have been going on for awhile now.