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service provider
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...
This document describes a method by which a Service Provider may use
an IP backbone to provide IP Virtual Private Networks ...
... method uses a "peer model", in which the customers'
edge routers (CE routers) send their routes to the Service Provider's
edge routers (PE routers ...
... [BGP,BGP-MP] is then used by the Service Provider to exchange the
routes of a particular VPN among the PE routers ...
... route.
Before a customer data packet travels across the Service Provider's
backbone, it is encapsulated ...
... client obtains IP backbone services from a Service Provider or
Service Providers with which it maintains contractual relationships.
...
... services from a Service Provider or
Service Providers with which it maintains contractual relationships.
The client may be an enterprise, a group ...
... extranet, an Internet Service Provider, an application service
provider, another VPN Service Provider that uses this same method to
...
... backbone services. It is also very
scalable and flexible for the Service Provider, and allows the
Service Provider to add value.
...
... scalable and flexible for the Service Provider, and allows the
Service Provider to add value.
...
... customers". We refer to
the owners/operators of the backbone as the "Service Providers"
(SPs). The customers ...
... customer may be a single enterprise, a set of enterprises, an
Internet Service Provider, an Application Service Provider, another
SP that offers the same kind of VPN service ...
... Section 10 discusses some of the special issues that arise when the
backbone spans several Service Providers.
...
... CE device may, for robustness, attach to multiple PE routers, of
the same or of different service providers. If the CE device is a
router ...
...
The RDs are structured so that every Service Provider can administer
its own "numbering space" (i.e., can make its own assignments of
...
... RDs), without conflicting with the RD assignments made by any other
Service Provider. An RD consists of three fields: a 2-byte type
field ...
... route
reflectors.
A service provider may modify the list of preconfigured Route
Targets on a route reflector. When this is done, the route
reflector ...
...
If a CE router is being managed by the Service Provider, then the
Service Provider will likely have a network management system ...
... CE router is being managed by the Service Provider, then the
Service Provider will likely have a network management system that
needs to be able to communicate with the CE router ...
... partition
carries routes for only a subset of the VPNs supported by the Service
Provider. Thus, no single route reflector is required to maintain
routes for all VPNs ...
... VPN-IPv4
routes at all.
As a result, no single component within the Service Provider network
has to maintain all the routes for all the VPNs ...