Paste Cisco IOS configs — one pane per device — and verify duplicate IPs, OSPF and BGP mismatches, subnet reachability and dead ACL rules. v1 Cisco IOS only.
Subnet / CIDR Calculator · Bandwidth-Delay Product Calculator · Subnet Quiz · Availability / SLA Calculator · Data-Center Capacity Planner · Tick-to-Trade Latency Calculator · Optical Link Budget Calculator · PTP Timing Budget Calculator · ECMP Hash Polarization Visualizer · Firewall ACL Rule Analyzer · PTP/SyncE Network-Wide Timing Simulator · Wireshark Display Filter Builder · Wi-Fi Channel Interference Planner · QoS Token-Bucket Policer & Shaper Simulator — all free, all run entirely in your browser.