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Network Processing Engine and Network Services Engine Installation and Configuration
OL-4448-12
Chapter 5 NPE-G1 Overview
NPE-G1 Description and Overview
• The NPE-G1 uses no bandwidth points, and when used with any I/O controller, the I/O controller
also uses no bandwidth points. None of the Gigabit Ethernet interfaces on the NPE-G1 use
bandwidth points.
• The CompactFlash Disk on the NPE-G1 is available at all times, with or without an I/O controller
installed. The CompactFlash Disk is always addressed as the disk2 device, to avoid conflicts with
the disk0 and disk1 devices on the I/O controller, if the I/O controller is also installed.
Note The Gigabit Ethernet interfaces on the NPE-G1 do not support the Inter-Switch Link (ISL) VLAN
encapsulation protocol. We recommend that customers use the IEEE 802.1Q VLAN encapsulation
protocol as an alternative. Where an application requires the use of ISL, this can be provided by the Fast
Ethernet or Gigabit Ethernet port adapters or I/O controllers.
System Management Functions
The NPE-G1 performs 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 (including recognition and initialization during online insertion and
removal)
Terms and Acronyms
• Boot ROM—Read-only memory that stores the boot image for bringing up the Cisco IOS image
• Cache—Memory with fast access and small capacity used to temporarily store recently accessed
data; found either incorporated into the processor or near it
• DDR SDRAM—double data rate synchronous dynamic random-access memory
• CWDM GBIC—Coarse Wavelength-Division Multiplexing Gigabit Interface Converter
• Flash memory—Location where the basic boot image is stored
• Instruction and data cache—Instructions to the processor, and data on which the instructions work
• Integrated cache—Cache that is built into the processor; sometimes referred to as internal cache.
Cache memory physically located outside the processor is not integrated, and is sometimes referred
to as external cache.
• LDT bus—lightning data transport bus
• NVRAM—nonvolatile random-access memory
• OTP—one time programmable