Terminology - Cisco ASR 5500 System Administration Manual

System Operation and Configuration
The ASR 5500 is designed to provide subscriber management services for Mobile Packet Core networks.
Before you connect to the command line interface (CLI) and begin system configuration, you must understand
how the system supports these services. This chapter provides terminology and background information to
consider before you configure the system.
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Terminology

This section defines important terms used throughout this guide.
Contexts
A context is a logical grouping or mapping of configuration parameters that pertain to various physical ports,
logical IP interfaces, and services. A context can be thought of as a virtual private network (VPN).
The system supports the configuration of multiple contexts. Each context is configured and operates
independently of the others. Once a context has been created, administrative users can configure services,
logical IP interfaces, and subscribers for that context and then bind the logical interfaces to physical ports.
You can also assign a domain alias to a context; if a subscriber's domain name matches one of the configured
alias names for a context, that context is used.
Terminology, page 1
Trusted Builds, page 4
How the System Selects Contexts, page 4
Understanding Configuration Files, page 8
IP Address Notation, page 9
Alphanumeric Strings, page 10
C H A P T E R
ASR 5500 System Administration Guide, StarOS Release 21.5
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