He called it "Cisco_Filter."

The NOC was drowning in noise. Alarms chirped, phones buzzed, and across six monitors, Simon watched a waterfall of green-on-black console text scroll past. He was troubleshooting a BGP route flap that had taken down a remote office in Jakarta. The problem was simple: find the neighbor flapping. The reality was hell: 10,000 lines of Cisco debug output.

Simon used Xshell. Most of his colleagues stuck with PuTTY or SecureCRT, but Simon had spent a weekend three years ago building the perfect .