Our business is connected to various outside facilities across town via fiber. We lease the fiber, and have Cisco ASA (or PIX) firewalls on each end with a VPN tunnel connecting our private networks.

We noticed a peculiarity on our Comcast EDI 50M link which uses a Ciena LE-311v for hand off. This device provided by Comcast is something like a decade old, so maybe that's the cause: Start high ...