Specifications

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2.10.9 POS Interfaces Specifications
As demand for more bandwidth increases, service providers need to build
out new, state-of-the-art, optical infrastructures to achieve greater backbone
throughput and faster network response times. Juniper Networks, Inc. is at
the forefront of routing infrastructure build-out, offering a complete range of
SONET/SDH Physical Interface Cards (PICs) and supporting speeds from
OC-3c/STM-1 through OC-192c/STM-64. All M-series SONET/SDH PICs
support wire-rate forwarding with advanced services enabled, ensuring
reliable network performance and service delivery under all conditions.
Additionally, all PICs support unparalleled port densities, optimizing valuable
POP rack space.
SONET/SDH Physical Interface Cards (PICs) for M-series Internet backbone
routers enable you to build state-of-the-art optical infrastructures to achieve
greater backbone throughput and faster network response times.
M-series SONET/SDH PICs support rich packet processing with predictable
performance, while offering market-leading port density. They also provide
IP-over-SONET optical connectivity to backbone or access circuits.
Features
§ Wire-rate throughput on all ports with advanced services and features
enabled
§ High-density interface concentration
§ SONET Manager II ASIC performs HDLC encapsulation and
SONET/SDH framing of packets at wire-rate speed on all ports
§ No input buffering delay on PIC
§ Rate limiting on input and output
§ Packet buffering, Layer 2 parsing
§ SONET/SDH framing
§ Alarm and event counting and detection
§ Per-port status LED
§ Dual-router Automatic Protection Switching (APS) and Multiprotocol
Label Switching (MPLS) Fast Reroute protection mechanisms
§ Encapsulations
o Cisco High-level Data Link Control (HDLC)
o Frame Relay
o MPLS Circuit Cross-connect
o Point-to-Point Protocol (PPP)
Additionally, the SONET/SDH PICs work with the Internet Processor II™
ASIC to support filtering, sampling, load balancing, class of service, and rate
limiting.
Dual-router Automatic Protection Switching
The SONET/SDH PICs support dual-router APS 1:1, which enables two
routers and a SONET ADM to communicate. This functionality ensures a
secondary path in the case of a router-to-ADM circuit failure, interface failure,
or router failure. This functionality is interoperable with any ADM that uses
GR253-style signaling (K1/K2). In addition to the automatic switchover, you
can manually initiate the switchover.
MPLS Fast Reroute
MPLS Fast Reroute provides fast recovery if any circuit or router along a
predetermined MPLS path, known as the label switched path (LSP), fails.
Each router along the LSP computes a standby detour path that avoids its
downstream hop. If a circuit fails, the nearest upstream router automatically
activates the detour paths.