You can partition a single physical router into multiple logical devices that perform independent routing tasks. Because logical systems perform a subset of the tasks once handled by the physical router, logical systems offer an effective way to maximize the use of a single router.
Note: Beginning with JUNOS software Release 9.3, the logical router feature has been renamed logical system. All configuration statements, operational commands, show command outputs, error messages, log messages, and SNMP MIB objects that contain the string logical-router or logical-routers have been changed to logical-system and logical-systems, respectively.
This chapter discusses the following topics related to understanding and configuring logical system properties: