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MPLS TE Application on an IP MAN
Service Overview
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)
Table 4-26 lists
the requirements of these services.
Table 4-26 Services on an IP MAN
Service |
QoS Requirements |
Reliability Requirements | Security Requirements |
|---|---|---|---|
HSI |
|
|
|
VoD |
|
||
VoIP |
|
||
Business VPN |
|
Networking Description
Currently, an IP MAN consists of a MAN backbone and a MAN access
network, which deliver services to users. Figure 4-40 and Figure 4-41 show end-to-end
service models for individual and enterprise subscribers.
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, see Table 4-27.
Table 4-27 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 |
|
|
QoS |
End-to-end QoS must be configured between a user-end provider edge (UPE) and a terminal access gateway or service router (SR) to ensure service quality. |
|
Security |
RSVP MD5 or keychain is used for authentication. |
|
Explicit paths are configured to establish primary and bypass CR-LSPs. The two paths do not overlap in important areas.