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Alcatel-Lucent 7450 Ethernet Service Switch | Data Sheet 3
Uncompromising interoperability
All 7450 ESS IOM generations can be
intermixed in the same chassis, with
no adverse performance or service
impact. In addition, IOMs support any
generation of MDA and automatically
detect which MDA has been inserted
to deliver the expected performance
levels. As a result of FP technology
design con sistency, each IOM and
paired MDA will operate at their
intended, performance and service
levels, with complete predictability.
Provisioning, features and services are
consistently implemented across IOMs
to ensure operational continuity.
Advanced traffic management
with per-subscriber, per-service
granularity
Each 7450 ESS IOM provides granular
and scalable traffic management
services on a fully distributed basis.
There are no pre-defined parameters,
queue blocks or hard-coding of H-QoS
capabilities in the IOM FP2 archi tecture.
As a result, queues for gran ular traffic
management are shared across all
ports and subscribers serviced by any
given IOM.
Massive queue capacity
The 7450 ESS IOM-1 provides 32,000
pooled queues, with half of the total
pool available to each inserted MDA.
The 7450 ESS IOM3-XP has a single FP2
packet processing complex, doubling
the total number of available queues
to 64,000. The IOM3-XP further extends
queue flexibility by making its total
queue pool available to both inserted
MDAs. Consequently, each traffic
management queue may be dynami-
cally assigned, in real time, to any port,
any subscriber and any service. As a
result, subscribers only consume the
precise number of queues needed,
leaving the remaining queue resources
available for assignment to other
subscribers and services.
Granular queue-based
traffic shaping
The 7450 ESS IOM provides granular
traffic shaping at the individual queue
level, overcoming the limitations and
inflexibility associated with per-
subscriber aggregated shaping.
Consequently, by shaping subscriber
traffic on a per-service basis, the total
allocated per-subscriber bandwidth
can be dynamically shared across all
applications or services while strict
control of aggregate per-subscriber
bandwidth allotments is maintained.
The 7450 ESS IOM3-XP enables even
deeper and more granular control over
distinct flow types, allowing each
queue to be shaped to four different
user-definable states, with up to eight
distinct priority levels. Traffic is then
forwarded based on the combination
of queue shaping, state and priority.
The IOM3-XP also adds up to one million
two-tier policers to provide even
deeper levels of granular per-subscriber
and per-service traffic control.
Table 1. 7450 ESS IOM3-XP and IOM-1 compared
7450 ESS IOM3-XP 7450 ESS IOM-1
Network processor technology FP2 technology FP technology
Chassis backplane throughput Up to 50 Gb/s (full duplex) Up to 20 Gb/s (full duplex)
Per-MDA slot throughput Up to 25 Gb/s (full duplex) Up to 10 Gb/s (full duplex)
Supported MDAs MDA and MDA-XP MDA and MDA-XP
H-QoS queues Up to 64,000 Up to 32,000
Queue grouping Dynamically assignable across IOM Dynamically assignable per MDA
Queues available to all ports Yes - all 64,000 assignable to any port on IOM Yes – 16,000 assignable to any port per MDA
Hardware policers 1 million 16,000
Aggregate chassis capacity 1 Tb/s (half duplex) 400 Gb/s (half duplex)