MPLS Guide PCEP
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307
Figure 16 NSP Functional Modules
The two main components of the NSP are:
• Network Services Director (NSD)
The NSD is a programmable and multi-vendor service provisioning tool
providing a single and simple API to the user and OSS. It implements a service
model abstraction and adapts to each vendor-specific service model. It supports
provisioning services such as E-Line, E-LAN, E-Tree, Layer 3 VPN, traffic
steering, and service chaining.
• Network Resource Controller (NRC)
The NRC implements separate modules for computing and managing optimal
paths for optical tunnels (NRC-T) and MPLS tunnels (NRC-P), and for
computing optimal routing and placement of IP flows (NRC-F). In addition, a
resource controller for inter-layer IP and optical path computation and more
complex inter-domain MPLS path computation is provided as part of the NRC-X.
26698
NRC-X
Hierarchical PCE
Optical PCE
IP/MPLS PCE
ReST/Netconf
NRC-T: Network Resource Control Transport
NRC-P: Network Resource Control Packet
NRC-X: Network Resource Control Cross Domain
Inter-layer/domain Path
Computation
Netconf/PCEP Top o Disc
NRC-T
ReST/Netconf
Optical Path
Computation
Netconf/PCEP EMS
NRC-P
ReST/Netconf
BGP-LS/IGP-TE PCEP
NRC-F
MULTI-VENDOR, MULTI-DOMAIN, MULTI-LAYER NETWORK
ReST/Netconf
Flow Placement MPLS Path Computation
PCEP/OF/BGP Top o Disc
NSD
Re
ST/Netconf
Service
Provisioning
Service Connection
Function
EMS Netconf SNMP CLI PCEP
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