Terminology - Cisco ASR 5000 Series Administration Manual

System Operation and Configuration
Important

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.
Ports
Ports are the physical connectors on line cards that support remote access and subscriber traffic. Port
configuration includes traffic profiles, data encapsulation methods, media type, and other information for
physical connectivity between the system and the rest of the network.
Ports are identified by the chassis slot number for the Management Input/Output (MIO/UMIO/MIO2) card,
followed by the physical connector number. For example, Port 5/10 identifies connector number 10 on the
MIO/UMIO/MIO2 card in slot 5.
Associate ports with contexts through bindings. For additional information on bindings, refer to the Bindings
section below. You can configure each physical port to support multiple logical IP interfaces, each with up
to 17 IP addresses (one primary and up to 16 secondaries).
For complete information on line cards and port assignments, refer to the ASR 5500 Installation Guide.
Important
Important
By default StarOS supports local Console access to the CLI via the RS-232 Console port for initial system
configuration.
UMIO cards and UDPC/UDPC2s are direct replacements for MIO cards and DPC/DPC2s. However, a
special Universal PID license must be purchased and installed on the chassis for each installed UMIO and
UDPC/UDPC2. Contact your Cisco account representative for additional licensing information.
Throughout this guide, any reference to an MIO card or DPC is assumed to also refer to the UMIO and
UDPC/UDPC2 respectively.
ASR 5500 System Administration Guide, StarOS Release 21.4
Terminology
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