Carriers are converging their service bearer networks. IP/MPLS technology is essential on these converged networks because the technology allows voice, video, leased line, and data services to be transmitted on an IP/MPLS backbone network. Depending upon individual subscribers' requirements, services on a metropolitan area network (MAN) are classified into:
For individual subscribers: high-speed Internet (HSI), video on demand (VoD), and voice over IP (VoIP)
For business and enterprise subscribers: L3VPN services (business VPN) and L2VPN services (data, video, and voice services)
Services on an IP MAN:
Service | QoS Requirements | Reliability Requirements | Security Requirements |
|---|---|---|---|
HSI |
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VoD |
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VoIP |
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Business VPN |
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Networking Description
Service model of an individual subscriber
Service model of an enterprise subscriber
Feature Deployment
Enterprise or individual services are core services that have bandwidth, QoS, and reliability requirements. MPLS TE tunnels are recommended as VPN tunnels on the public network to meet service requirements. For detailed deployment
MPLS TE deployment on an IP MAN
Item | L3VPN | L2VPN |
|---|---|---|
Services | Business VPN |
|
VPN tunnel on the public network | MPLS TE tunnel | MPLS TE tunnel |
Reliability |
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QoS | End-to-end QoS must be configured between a user-end provider edge (UPE) and a broadband remote access server (BRAS) or service router (SR) to ensure service quality. | |
Security | RSVP MD5 or keychain is used for authentication. | |
