Deployment Scenarios with CSC Architecture
Three deployment scenarios are possible with CSC architecture:
Customer carrier is not running MPLS inside its POP sites.
Customer carrier is running MPLS inside its POP sites.
Customer carrier is providing MPLS VPN services to user sites.
The following sections delve into each of the deployment scenarios in greater detail.
CSC Network—Customer Carrier Not Running MPLS
In this deployment model, devices in the customer carrier ISPX do not use MPLS and no IGP/LDP label exchange takes place inside the customer carrier network. MPLS is enabled only on the CE router (CSC-CE1-X-AS2 and CSC-CE2-X-AS2) interface peering with the PE router located in the backbone carrier network. The backbone carrier only has ...
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