June 2005
Intermediate to advanced
312 pages
11h 13m
English
Content preview from MPLS VPN Security
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Specific Carrier’s Carrier Considerations 69
Another model involving several providers is the Carrier’s Carrier model. It allows a
hierarchical structure, where a service provider resells a service from an MPLS provider.
The next section covers this case.
Specific Carrier’s Carrier Considerations
The Carrier’s Carrier (CsC) architecture is described in RFC 2547bis, and can best be
described as hierarchical MPLS VPNs: CsC provides an MPLS VPN service that other
carriers use to resell their services.
How CsC Works
Figure 3-13 shows how the CsC architecture looks. The first-level service provider is
commonly called the backbone carrier; the second-le ...
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