Tools
AI fabric calculators
The numbers that decide designs. Everything runs in your browser; nothing is sent anywhere.
ECMP collision odds
Few large flows hashed onto equal paths: how often do they collide? Read the background in One link fails, every job slows.
Incast queue growth
Many senders converge on one port. How fast does the queue grow before any sender reacts? Background: The six places an AI fabric congests.
End-to-end oversubscription
Ratios multiply along a path: 3:1 at the leaf and 2:1 at the border is 6:1 in the worst case, not 5:1.
Simplified models for reasoning about designs, not substitutes for testing. Validate with real traffic in a lab.