The solution scales as the number of VPNs offered by the customer carriers increases.

The solution scales as the number of end-customer routes increases.

There is no need to manage end-customer services.

The solution scales as the number of serviced customer carriers increases.

CSC does not allow a customer carrier to offer Layer 2 services to its end customers.

A CSC VPRN is configured on the network provider ' s CSC-PE routers.

CSC eliminates the need for customer carriers to build and maintain their own MPLS backbone.

The network provider provides an MPLS VPN backbone to the customer carrier.

This is the base routing table from CE-1

This is the base routing table from PE-1

This is the customer vrf from CE-1

This is the customer vrf from PE-1D.This is the customer vrf from PE-1

This is the customer vrf from PE-2E.This is the customer vrf from PE-2E.This is the customer vrf from PE-2

This is the base routing table from PE-2F.This is the base routing table from PE-2F.This is the base routing table from PE-2

This is the base routing table from CE-2G.This is the base routing table from CE-2G.This is the base routing table from CE-2

A single routing protocol for exchanging routes with both the internal customer routers and with the PE

MP-BGP to exchange routes with the PE.

MPLS and a routing protocol for the exchange of labels and routes with the PE

MPLS for exchanging labels with other CE devices

A routing protocol for exchanging routes with the internal customer routers and a routing protocol for exchanging routes with the PE

Router R1

Router R2

Routers R1 and R2

Router R3

Router R4

MP-BGP for exchanging customer routes with other PEs

A routing protocol for exchanging customer routes with the CE

MPLS for exchanging labels with other provider core devices

MPLS for exchanging labels with the CE devices

Targeted LDP for exchanging VPRN labels with other PE devices

A label signaling protocol for defining transport tunnels between PE and CE devices

Family vpn-ipv4

Family vprn-ipv4

Family vprn

Address-family vpn-ipv4

Address-family vprn-ipv4

Address-family vprn

An MP-BGP update carries an MPLS label that is used as the service label for a VPRN.

There can be multiple Route Targets per route in an MP-BGP update.

There can only be one Route Distinguisher per route in an MP-BGP update.

On a specific PE, the MP-BGP updates for prefixes from a single VPRN carry different labels.

Traditional BGP attributes and MP-BGP attributes are present in an MP-BGP update.

The Nokia 7750 SR allows the setting of the maximum number of routes that can be accepted in a VRF for a VPRN service.

The " maximum-routes " command is used to specify the maximum number of remote routes that can be held within a VRF for a VPRN service.

When the " maximum-routes " command is used with the " log-only " parameter, new routes are still learned.

Once the " threshold " value is reached, no new routes are added to the VRF.

The routes to be shared are identified by common route targets

The routes to be shared are identified by common route distinguishers

The routes to be shared are identified by common AS numbers

The routes to be shared are identified by common VPN labels