Connectionless Network Service (CLNS) is a Layer 3 protocol similar to IPv4 for linking hosts (end systems) with routers (intermediate systems) in an Open Systems Interconnection (OSI) network. CLNS and its related OSI protocols, Intermediate System-to-Intermediate System (IS-IS) and End System-to-Intermediate System (ES-IS), are International Organization for Standardization (ISO) standards.
You can configure Services Routers as provider edge (PE) routers within a CLNS network. CLNS networks can be connected over an IP MPLS network core using BGP and MPLS Layer 3 virtual private networks (VPNs). For more information, see RFC 2547, BGP/MPLS VPNs.
You can use either the J-Web configuration editor or CLI configuration editor to configure CLNS.
This chapter contains the following topics. For more information about CLNS, IS-IS, and ES-IS, see the JUNOS Routing Protocols Configuration Guide.