North American Network Operators Group

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Followup British Telecom outage reason

  • From: Sean Donelan
  • Date: Fri Nov 23 18:01:50 2001

BT is telling ISPs the reason for the multi-hour outage was
a software bug in the interface cards used in BT's core network.
BT installed a new version of the software.  When that didn't fix
the problem, they fell back to a previous version of the software.

BT didn't identify the vendor, but BT is identified as a "Cisco Powered
Network(tm)."  Non-BT folks believe the problem was with GSR interface
cards.  I can't independently confirm it.