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Cisco 7200 VXR Installation and Configuration Guide
OL-5013-09
Chapter 1 Cisco 7200 VXR Product Overview
Field-Replaceable Units
The NPE-150 has 1 MB of SRAM and the NPE-200 has 4 MB of SRAM. No other network
processing engine or network services engine has SRAM.
• Cache memory
–
The NPE-G2 has two levels of cache: a primary and a secondary cache that are internal to the
microprocessor, with the secondary unified cache for data and instruction.
–
The NPE-G1 has two levels of cache: a primary and a secondary cache that are internal to the
microprocessor, with the secondary unified cache for data and instruction.
–
The NSE-1 has three levels of cache: a primary and a secondary unified cache that are internal
to the microprocessor, and a tertiary 2-MB external cache.
–
The NPE-400 has three levels of cache: a primary and a secondary cache that are internal to the
microprocessor, and a tertiary 4-MB external cache that provides additional high-speed storage
for data and instructions.
–
The NPE-300 has three levels of cache: a primary and a secondary cache that are internal to the
microprocessor, and a tertiary 2-MB external cache that provides additional high-speed storage
for data and instructions.
–
The NPE-225 has two levels of cache: a primary cache that is internal to the processor and a
secondary 2-MB external cache that provides additional high-speed storage for data and
instructions.
–
The NPE-200 has unified cache SRAM that functions as the secondary cache for the
microprocessor. (The primary cache is within the microprocessor.)
–
The NPE-175 has two levels of cache: a primary cache that is internal to the processor and a
secondary 2-MB external cache that provides additional high-speed storage for data and
instructions.
–
The NPE-150 has unified cache SRAM that functions as the secondary cache for the
microprocessor. (The primary cache is within the microprocessor.)
–
The NPE-100 has unified cache SRAM that functions as the secondary cache for the
microprocessor. (The primary cache is within the microprocessor.)
• Two environmental sensors for monitoring the cooling air as it leaves the chassis
• Boot ROM for storing sufficient code for booting the Cisco IOS software; the NPE-G2, NPE-G1,
NSE-1, NPE-400, NPE-300, NPE-225, NPE-200, and NPE-175 have boot ROM.
The network processing engines and network services engine perform the following system management
functions:
• Sending and receiving routing protocol updates
• Managing tables, caches, and buffers
• Monitoring interface and environmental status
• Providing Simple Network Management Protocol (SNMP) management through the console and
Telnet interface
• Accounting for and switching of data traffic
• Booting and reloading images
• Managing port adapters (recognition and initialization during online insertion and removal)
The following figures and memory tables provide information about your NPE or NSE:
• NPE-G2 is represented by Figure 1-5. Table 1-2 lists NPE-G2 memory specifications, and Table 1-3
lists memory configurations.
