Cisco Cisco 7600 2-Port OC-12c STM-4c ATM Optical Services Module 데이터 시트
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Figure 3
Application 2: Inter-POP Connectivity
In addition to the two OC12 ATM ports, each card comes with four switched Gigabit Ethernet interfaces that enable Ethernet connectivity
in service provider networks. These line cards facilitate network growth with a variety of high-performance IP services.
TWO PORT OC12 ATM OSM FEATURE SUMMARY
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Parallel Express Forwarding (PXF) IP Services Processor on the line card. The PXF IP Services Processor consists of a 4 x 4 array of
microprocessing units, each equipped with local memory, to deliver a pipelined, parallelized processing array. Each PXF IP Services
Processor can apply IP services to 16 different packets simultaneously—all with high levels of performance. The OC12 ATM line cards
are populated with one PXF IP Services processor.
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High-Performance forwarding of distributed IP service.
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Programmable software feature sets for "evergreen" IP service delivery. Unlike traditional ASICs, which have feature sets hardcoded in
silicon, each PXF engine can be enhanced in the field via an easy software upgrade.
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Deep packet buffering to maximize TCP throughput, with advanced traffic management and prioritization schemes to ensure
deterministic packet delivery.
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Four additional ports of Gigabit Ethernet provides connectivity to other routers or servers without burning up "customer-facing" line
card slots.
ATM Features
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Unspecified Bit Rate (UBR)
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Variable Bit Rate-non real-time (VBR-nRT)
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Max VCs (1000 per card, 500 per port
1
)
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Max simultaneous segmentation and reassembly: 1000 (1000 Max active VCs)
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VPI Range 0-255 (up to 16 configured simultaneously)
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VCI Range (1-1023)
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RFC-1577 classical IP over ATM
Limit of 4000 VCs per Cisco 7600