Technical Reference Guide, Configuration Guide: Node Slicing on the MX960 https://www.juniper.net/documentation/en_US/release-independent/solutions/information-products/pathway-pages/node-slicing-mx960-cg.pdf written by Victor Ganjian, and edited for publication by Walter Goralski.
Abstract: Junos Node Slicing partitions a single MX chassis into multiple independent routers, each with its own control, data, and management planes. This guide uses a configuration example to show how to prepare, install, configure, and verify node slicing on an MX960.