Техническая Спецификация для Cisco 1 Port OC3C/S PA-POS-OC3SML=
Модели
PA-POS-OC3SML=
POS/SDH Port Adapter for the Cisco 7500 and 7200
D
ATA
S
HEET
Packet over SONET/SDH Port Adapter for the Cisco 7200 and 7500
T
HE
P
ACKET OVER
S
YNCHRONOUS
O
PTICAL
N
ETWORK
(SONET)/S
YNCHRONOUS
D
IGITAL
H
IERARCHY
(SDH)
P O RT A D A P T E R
(PA)
I S A S I N G L E
-
P O RT
,
S I N G L E
-
W I D E
OC-3
C
/STM1
P O RT A D A P T E R F O R
THE
C
ISCO
7200
AND
7500.
The PA-POS-OC3MM, PA-POS-OC3SML and
PA-POS-OC3SMI are now End of Sales (EOS) as of July 31,
2006 for all supported platforms. For more details, please
see product bulletin:
http://www.cisco.com/en/US/products/hw/modules/
ps2033/prod_eol_notice0900aecd80224b94.html
Overview
The POS PA is supported on the NPE-150 and NPE-200
in the Cisco 7200, and the VIP2-50 in the Cisco 7500.
The POS PA is available in three physical interfaces: OC-3c/
STM1 Multimode (MM), OC-3c/STM1 Single-Mode
Intermediate Reach (SM-IR), or OC-3c/STM1 Single-Mode
Long Reach (SM-LR).
Using the Point-to-Point Protocol (PPP), the POS PA
maps IP packets into SONET/SDH frames in hardware
and transports them over the optical SONET/SDH network.
PPP was designed as a standard method of communicating
over point-to-point links. The POS PA supports both
RFC 1619, “PPP over SONET/SDH” and RFC 1662,
“PPP in HDLC-Like Framing.”
Superior IP Performance
As IP traffic in Service Provider and Enterprise networks
continues to grow at an incredible rate, high-performance
is essential. A major advantage of mapping IP packets
directly into SONET/SDH technology is the ability to
provide superior performance.
Specifically designed to maximize distributed switching
performance, the POS PA provides line-rate OC-3c/STM1
throughput for average size packets in the VIP2-50. In
addition, a single POS PA/VIP2-50 configuration in a
Cisco 7500 provides an aggregate throughput of up to
138,000 packets-per-second in each direction using 64 byte
packets. A POS PA in a Cisco 7200 with an NPE-200
provides an aggregate throughput of up to 94,000
packets-per-second in each direction using 64 byte packets.
Platform Flexibility and Increased Port Density
The Packet over SONET/SDH port adapter (POS PA)
provides the same level of high switching performance as
the existing Packet over SONET/SDH Interface Processor
(POSIP) in a single-wide port adapter design. This allows
more flexible high-performance networks to be designed
with greater port density. In addition, different port adapter
technologies such as serial, multichannel, Ethernet and
Fast Ethernet, can be combined with the POS port adapter
on the same platform.
The POS PA is designed to provide maximum switching
performance when a single POS PA is installed in a single
VIP2-50. For applications that require maximum port
density and/or lower system cost, the VIP2-50 also supports
any combination of port adapters including dual POS PAs.
Though a single POS PA alone can utilize the entire switching
capacity of the VIP2-50, dual port adapters in the same
VIP2-50 share the switching and bandwidth capacity.
The POS PA extends the benefits of Packet over SONET/
SDH connectivity to the Cisco 7200. Providing tremendous
network flexibility, the POS PA can be deployed on the
Cisco 7200 in SONET/SDH networks that require a large
number of distributed multi-service edge routers. Up to three
POS PAs can be installed in the same Cisco 7200.