Cisco Cisco ONS 15454 M2 Multiservice Transport Platform (MSTP) Hoja De Datos

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GMPLS UNI also enables routers to request diverse paths based on the Label Switched Path identifier

(LSP-ID). As a result, the resiliency requirements of the network are improved while the network cost is also

reduced, because there is no need to preprovision multiple paths for each router port in the DWDM network.

Control Plane Capabilities

In networks with an ASON and GMPLS control plane, establishing a connection only considers bandwidth and

whether the link is up or down. Optical layer impairments are not considered, and the optical channel is assumed to

work by design. In this case, only preplanned channels are guaranteed to work, as shown in Figure 2. GMPLS

alone is not sufficient to decide whether a proposed path is feasible in the photonic domain.

Figure 2. 40 Gbps Service with ASON and GMPLS Path Computation

The Cisco WSON was introduced to achieve dynamic service provisioning and restoration capabilities in DWDM

networks. This solution provides extensions to GMPLS that supply path computation with optical feasibility

analysis, while providing protocol interoperability with the GMPLS suite. Optical feasibility analysis and verification

require GMPLS

to be aware of physical optical impairments. Cisco’s DWDM-aware GMPLS is aware of optical

network topology, optical component functional models, node models, node configuration, and fiber characteristics,

which are all fundamental in optical channel path verification. The following crucial impairments are considered

while performing feasibility analysis:

●

Linear impairments: Optical signal-to-noise ratio (OSNR), optical power budget, chromatic dispersion (CD),

and polarization mode dispersion (PMD)