Packet Path — Free Network Engineering Tools & Guides

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Home Tools Guides Tracks Labs Gear About Contact

Packet Path

Free network engineering tools and deep, practical guides — from your first subnet to low-latency production networks.

Tools

Subnet calculator
Bandwidth-delay calculator
Subnet quiz
SLA & downtime
DC capacity planner
Data Center Fabric Designer
RoCEv2 lossless planner
DWDM / 400ZR reach planner
Multicast design studio
BGP route reflector planner
CGNAT Port-Block Planner
Microburst Buffer Planner
400G/800G Port Breakout Planner
Optical link budget
Tick-to-trade latency
PTP timing budget
PTP Holdover Planner
PTP/SyncE timing simulator
ECMP hash visualizer
ACL rule analyzer
Network config verifier
iPerf3 command builder
MTU/MSS tunnel overhead calculator
BGP toolkit
Wireshark filter builder
Wi-Fi channel planner
QoS token-bucket simulator

Learn

All guides
Career tracks
Lab gear
About
Contact

Popular

BGP explained
Subnetting cheatsheet
Build a home lab
CCNA vs Network+

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