Cisco 7206VXR - VPN Bundle Router Configuration Manual page 31

Chapter 1 Cisco 7200 VXR Product Overview
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
•
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
lists memory configurations.
OL-5013-09
– 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.)
Figure 1-5. Table 1-2 lists NPE-G2 memory specifications, and
Cisco 7200 VXR Installation and Configuration Guide
Field-Replaceable Units
Table 1-3
1-13