// Copyright (c) 2005 DMTF. All rights reserved. // Add UmlPackagePath // qualifier values to CIM Schema. // ================================================================== // CIM_AutonomousSystem // ================================================================== [Version ( "2.6.0" ), UMLPackagePath ( "CIM::Network::Systems" ), Description ( "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. \n" "\n" "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.\'" )] class CIM_AutonomousSystem : CIM_AdminDomain { [Description ( "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." )] uint16 ASNumber; [Description ( "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." )] boolean IsSingleHomed; [Description ( "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." )] boolean IsTransit; [Description ( "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." )] boolean RequireIGPSync; [Description ( "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 { "0", "1", "2", "3" }, Values { "Unknown", "Static", "Dynamic", "Semi-Dynamic" }] uint16 RoutingUpdateSource; [Description ( "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. \n" "\n" "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 { "0", "1", "2", "3", "4" }, Values { "Unknown", "None", "Aggregate Only", "Aggregate And All Specific Routes", "Aggregate Based on Subset of Specific Routes" }] uint16 AggregationType; };