Cisco Systems NPE-225, NPE-175 manual Interfaces

Chapter 6 NPE-G2 Overview

NPE-G2 Description and Overview

•Cache memory

The NPE-G2 has two levels of cache: primary and secondary cache that are internal to the microprocessor with secondary unified cache for data and instruction.

•The NPE-G2 uses DDR SDRAM for providing code, data, and packet storage.

•Two environmental sensors for monitoring the cooling air as it enters and leaves the chassis.

•Full-feature I/O controller functionality

–Three Gigabit Ethernet interfaces (six ports: three SFP [optical] and three RJ-45s [copper]). Any three ports are available at the same time and are linked directly to the processor; therefore the interfaces are not charged bandwidth points.

–CompactFlash Disk for storing the default Cisco IOS software image. The CompactFlash Disk slot can be used whether or not an I/O controller is in the router.

–Auxiliary port with full data terminal equipment (DTE) functionality. (Functional when an I/O controller is not present. If an I/O controller is present, its auxiliary port is the default port.)

–Console port with full data communications equipment (DCE) functionality. (Functional when an I/O controller is not present. If an I/O controller is present, its console port is the default port.)

–Dedicated 10/100 Fast Ethernet Management port—Not to be used for any other purpose.

–Two USB ports for data storage using Cisco USB flash memory modules or security eToken for VPN applications.

–Boot ROM for storing the ROMmon images.

–Internal flash memory for storing the boot helper (boot loader) image and the Cisco IOS image. (The boot helper image comes installed on the NPE-G2.) If an I/O controller is present, its internal flash memory is no longer available.

–NVRAM for storing the system configuration and environmental monitoring logs. NVRAM uses lithium batteries to maintain its contents when disconnected from power. If an I/O controller is present, its NVRAM memory is no longer available.

–Upgradable memory module

Note An I/O controller can be used with the NPE-G2, but an I/O controller is not necessary for system functionality. Installing an I/O controller in a chassis with the NPE-G2 activates the console and auxiliary ports on the I/O controller and automatically disables the console and auxiliary ports on the NPE-G2. However, you can still use the Compact Flash Disk slots and Ethernet ports on both the NPE-G2 and I/O controller when both cards are installed.

Interfaces

The three interfaces on the NPE-G2 consist of three small form-factor (SFP) Gigabit Ethernet ports and three 10/100/1000 Fast Ethernet/Gigabit Ethernet ports. The rules for using these ports are:

•Only one port per interface can be used at any one time. For example, for interface Gigabit Ethernet 0/1, either the RJ-45 port can be used or the SFP port, but not both.

•A total of three ports on any of the three interfaces (0/1, 0/2, or 0/3) can be used at any one time; for example, 0/1 SFP, 0/2 SFP, and 0/3 RJ-45.

Network Processing Engine and Network Services Engine Installation and Configuration

6-4 OL-4448-12