Switching and VLANs
Calculated locally
STP Root Bridge Calculator
Compare switch bridge IDs to determine root bridge selection and tie-break outcomes.
Learn before you deploy
Reference PacketToolbox learning content related to this workflow.
Tool input
Use the fields below and run the calculation or generation locally.
Results
Review output and validation notes before production use.
How it works
Enter switch priority and MAC per row; the lowest bridge ID wins root election.
All processing runs in-browser with no external API dependency.
Practical example
Example: Priority 4096 beats 8192; ties are resolved by lower MAC.
Related tools
Use these together for complete design and troubleshooting workflows.
- IPv4 Subnet Calculator for subnet boundary and wildcard checks.
- VLSM Planner for hierarchical IPv4 allocation.
- Route Summarization Calculator for clean route advertisement planning.
- Cisco ACL Builder for policy-generation workflows.