# Class CIM_AutonomousSystem
extends CIM_AdminDomain

An Autonomous System (AS) is a fundamental concept in networking. An AS provides a structured view of routing by segregating the system that is using routing (e.g., the Internet, or an extranet) into a set of separately administered domains that each have their own independent routing policies. These domains are called autonomous systems. The classic definition of an AS, from RFC1771, is '...a set of routers under a single technical administration, using an interior gateway protocol and common metrics to route packets within the AS, and using an exterior gateway protocol to route packets to other ASs'. The RFC continues: 'Since this classic definition was developed, it has become common for a single AS to use several interior gateway protocols and sometimes several sets of metrics within an AS. The use of the term Autonomous System here stresses the fact that, even when multiple IGPs and metrics are used, the administration of an AS appears to other ASs to have a single coherent interior routing plan and presents a consistent picture of what destinations are reachable through it.'

### Table of Contents
Hierarchy
Direct Known Subclasses
Class Qualifiers
Class Properties
Class Methods

## Class Hierarchy

CIM_ManagedElement
|
+--CIM_ManagedSystemElement
|
+--CIM_LogicalElement
|
+--CIM_EnabledLogicalElement
|
+--CIM_System
|
+--CIM_AdminDomain
|
+--CIM_AutonomousSystem

## Direct Known Subclasses

## Class Qualifiers

Name | Data Type | Value
--- | --- | ---
Description | string | An Autonomous System (AS) is a fundamental concept in networking. An AS provides a structured view of routing by segregating the system that is using routing (e.g., the Internet, or an extranet) into a set of separately administered domains that each have their own independent routing policies. These domains are called autonomous systems. The classic definition of an AS, from RFC1771, is '...a set of routers under a single technical administration, using an interior gateway protocol and common metrics to route packets within the AS, and using an exterior gateway protocol to route packets to other ASs'. The RFC continues: 'Since this classic definition was developed, it has become common for a single AS to use several interior gateway protocols and sometimes several sets of metrics within an AS. The use of the term Autonomous System here stresses the fact that, even when multiple IGPs and metrics are used, the administration of an AS appears to other ASs to have a single coherent interior routing plan and presents a consistent picture of what destinations are reachable through it.'
UMLPackagePath | string | CIM::Network::Systems
Version | string | 2.6.0

## Class Properties

### Local Class Properties

Name | Data Type | Default Value | Qualifiers
--- | --- | --- | ---
Name | Data Type | Value
AggregationType | uint16 |
Description | string | Route aggregation refers to summarizing ranges of routes into one or more aggregate routes. This is done to minimize the number of routes in the global routing table. A potential drawback is that specific path information (e.g., the Path attribute value) is lost, which may lead to potential routing loops. There are a variety of ways to ensure that this does not happen. Note that BGP4 is required to do this. There are many ways to form aggregate routes. The following are the most popular: 'Aggregate only', where only the aggregate is advertised, and all of its more specific routes are suppressed; 'Aggregate Plus Specific Routes', where both the aggregate as well as its more specific routes are advertised (e.g., send the aggregate to the NAP, but send the more specific routes to providers); 'Aggregate Based on a Subset of Specific Routes', where the aggregate route is formed by looking at certain more specific routes and forming an aggregate on them, suppressing all others.
ValueMap | string | 0, 1, 2, 3, 4
Values | string | Unknown, None, Aggregate Only, Aggregate And All Specific Routes, Aggregate Based on Subset of Specific Routes
ASNumber | uint16 |
Description | string | An ASNumber is an integer between 1 and 65535, with the range 64512 through 65535 reserved for private use. Every AS has a unique AS number, which is assigned to it by an Internet Registry or a provider. IANA assigns and administers AS numbers.
IsSingleHomed | boolean |
Description | string | IsSingleHomed is a boolean that, when its value is TRUE, indicates that this AS reaches networks outside of its domain through a single exit point.
IsTransit | boolean |
Description | string | IsTransit is a boolean that, when its value is TRUE, indicates that this AS will advertise routes that it learns from other ASs. A non-transit AS will only advertise its own routes.
RequireIGPSync | boolean |
Description | string | RequireIGPSync is a boolean that, when its value is TRUE, indicates that this AS must obey the following rule: a router should not advertise destinations learned from internal neighbors to external destinations unless those destinations are also known via some internal gateway protocol. Otherwise, a router may receive traffic that cannot yet be routed. However, since this is a costly choice, it is common practice to allow this rule to be broken under certain carefully controlled circumstances.
RoutingUpdateSource | uint16 |
Description | string | RoutingUpdateSource defines how routing information is to be injected. Statically injected routes are maintained by the routing table and are independent of the status of the networks to which they refer. This is done simply by defining static routes in the routing table. Dynamically injected routes are of two types. Dynamic routes refer to distributing all of the IGP routes. Semi-dynamic routes define a set of specific IGP routes that will be injected.
ValueMap | string | 0, 1, 2, 3
Values | string | Unknown, Static, Dynamic, Semi-Dynamic

### Inherited Properties

Name | Data Type | Class Origin
--- | --- | ---
Caption | string | CIM_ManagedElement
CommunicationStatus | uint16 | CIM_ManagedSystemElement
CreationClassName | string | CIM_System
Description | string | CIM_ManagedElement
DetailedStatus | uint16 | CIM_ManagedSystemElement
ElementName | string | CIM_ManagedElement
EnabledDefault | uint16 | CIM_EnabledLogicalElement
EnabledState | uint16 | CIM_EnabledLogicalElement
HealthState | uint16 | CIM_ManagedSystemElement
InstallDate | datetime | CIM_ManagedSystemElement
InstanceID | string | CIM_ManagedElement
Name | string | CIM_System
NameFormat | string | CIM_AdminDomain
OperatingStatus | uint16 | CIM_ManagedSystemElement
OtherEnabledState | string | CIM_EnabledLogicalElement
PrimaryOwnerContact | string | CIM_System
PrimaryOwnerName | string | CIM_System
PrimaryStatus | uint16 | CIM_ManagedSystemElement
RequestedState | uint16 | CIM_EnabledLogicalElement
Status | string | CIM_ManagedSystemElement
TimeOfLastStateChange | datetime | CIM_EnabledLogicalElement
TransitioningToState | uint16 | CIM_EnabledLogicalElement
AvailableRequestedStates | uint16[] | CIM_EnabledLogicalElement
IdentifyingDescriptions | string[] | CIM_System
OperationalStatus | uint16[] | CIM_ManagedSystemElement
OtherIdentifyingInfo | string[] | CIM_System
Roles | string[] | CIM_System
StatusDescriptions | string[] | CIM_ManagedSystemElement

## Class Methods

### Inherited Class Methods

Name | Return Type | Class Origin
--- | --- | ---
RequestStateChange | uint32 | CIM_EnabledLogicalElement