Extreme 3802 安装指南

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Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide

Figure 164 shows the Accounting and Routing Module (ARM). 

Figure 164: Accounting and Routing Module (ARM)

The ARM is a self-contained module for the BlackDiamond 6800 series chassis-based system. Unlike 
most other BlackDiamond modules, there are no external interfaces on the ARM. Instead, the ARM 
provides advanced IP services for the other I/O modules installed in the chassis. The ARM contains a 
powerful set of packet processing resources and four full-duplex Gigabit Ethernet internal ports that 
connect to the BlackDiamond backplane switch fabric. The ARM operates in a one-armed fashion: 

Receiving frames from the switch fabric.

Processing the frames.

Transmitting the frames back into the switch fabric which then sends them to the appropriate I/O 
module. 

A maximum of four ARMs can be installed in a BlackDiamond 6800 series switch at any one time.

The ARM (Figure 165) has the following key components:

Two high-performance network processors

A GPP subsystem

The network processors are high-performance, programmable devices that enhance the Extreme “i” 
chipset to support expanded functionality, features, and flexibility.

The GPP subsystem handles system control and ARM management functions. The GPP subsystem 
resides outside the packet forwarding data path to optimize routing and billing performance.

Module status LEDs

Service port

Reset

Service port

ARM_001