Your network survives every failure, until one it never rehearsed
Redundancy on a diagram is not resilience in an outage. A single tandem node can quietly carry a third of your point-to-point routes, and you find out during the incident. NwTwin replaces the guesswork with a number: build a replica of the network, fail things in it on purpose, and measure what actually stays reachable.
The twin
Draw the network, or import it from your inventory: core/tandem nodes, access nodes, links and trails. It is a working replica, not a picture, so every change can be scored before anyone touches production.
The index
The Network Survivability Index (NSI) runs the topology through failure scenarios and scores connectivity network-wide, and per node and per link.
The analysis
Scores become advice in plain language: which link to add and how much survivability it buys, which link you can retire at no cost, and what to restore first in the current outage. Ask follow-up questions from any AI agent over MCP.