Alcatel-Lucent 7750 - Manual (Page 2)

Alcatel-Lucent 7750 Service Router | data Sheet 2
• Supports byte fairness to ensure
bandwidth is scheduled equally
between flows of same-priority traffic
with wide variations in packet size
• Delivers an expanded set of counters
for each subscriber context, totaling
16 sets with each counter set, tracking
stats such as:
¬ Discarded low-priority packets
and octets
¬ Discarded high-priority packets
and octets
¬ Forwarded low-priority packets
and octets
¬ Forwarded high-priority packets
and octets
• Provides additional capabilities for
managing congestion through egress
802.1p bit re-marking, based on the
committed information rate (CIR) state
• Supports ingress queue (color-aware)
policing where a CIR leaky-bucket is
configured with a threshold:
¬ Discards all packets that exceed
this CIR threshold
¬ Offers an alternative to using PIR
shaping with maximum burst size
(MBS) where eliminating jitter is
important
• Supports a CIR bypass-mode when
using ingress queue policing, allowing
packets with trusted markings to
ignore the CIR processing. PIR
processing will still be enforced:
¬ Forwards packets with un-trusted
markings with the usual CIR and
PIR processing enforcements
¬ Ensures that trusted packets enjoy
preferential treatment when CIR is
a factor
Benefits
The HS-MDA is ideal for large-scale
service deployments requiring high
scale, high density and fine granularity
of queues. The benefits of enhancing
the 7750 SR with the HS-MDA include:
• Delivers high queuing densities, the
equivalent of 19.2 million queues per
rack, reducing demand on scarce and
costly facility space within central
offices (COs)
• Allows multiple HS-MDAs to be flexibly
deployed as and where required,
creating an on-demand and service-
rich operating environment fully
interoperable with other MDA-types
• Ensures end users enjoy the highest
quality of experience (QoE) by being
fully integrated with the depth and
breadth of all service-rich 7750 SR
capabilities
• Offers service providers a Broadband
Remote Access Server (BRAS) replace-
ment plan that, combined with other
7750 SR features and functions,
leverages investment in a strategic
next-generation IP/MPLS and Carrier
Ethernet service edge to consolidate
legacy high-speed Internet (HSI)
services and subscriber authentication
• Provides service providers with the
scale, density and queuing granularity
to embrace emerging service require-
ments for mass-market residential,
business and mobile offerings,
including those delivered in conjunc-
tion with the Alcatel-Lucent Applica-
tion Assurance Integrated Service
Adapter (AA-ISA) for application-
based policy
Table 1. SFPs available for the HS-MDA
PArT nuMber InTerFAce TyPe SubTyPe connecTor FIber TyPe WAvelengTH PoWer rAnge
3He00028AA gige SFp LX SFp-LC Single mode 1310 nm 11 dB 10 km
3He00027AA gige SFp SX SFp-LC Multimode 850 nm 7.5 dB 550 m
3He00867AA gige SFp eX SFp-LC Single mode 1310 nm 18 dB 40 km
3He00029AA gige SFp ZX SFp-LC Single mode 1550 nm 24 dB 70 km