Service providers are able to
offer a range of different bandwidth and QoS options and to converge voice, video, and
data services onto a common IP/MPLS core.
Scalability By layering multiple services onto each MPLS LSP, the EoMPLS model
supports an immense number of services in each network because the network core
maintains no state on a per-service basis. Services may be provisioned across an arbitrary
geographic distance since IP/MPLS networks may be global in reach and since one
service may be provisioned over multiple service providers??™ networks. Each service may
be provisioned with the bandwidth required by the customer??”whether a few megabits
per second or several gigabits per second (though, as discussed in the solution fit discussion
below, EoMPLS may not be ideal for point-to-point services where the speed of
each service approaches that of a single wavelength in the provider??™s network).
Reliability By layering EoMPLS services over MPLS LSPs, the EoMPLS model protects
against network failures at the network layer and propagates fault notification
to the service layer only when the fault is unrecoverable. MPLS LSPs protect against
any link or node failure between the PEs providing the service, and they offer a range
of protection mechanisms with fast reroute able to restore service within a few milliseconds
of a fault occurring.
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