Extreme Networks e” series Hardware Installation Manual page 284

BlackDiamond 6800 Series I/O Modules
ARM
Figure 166 shows the Accounting and Routing Module (ARM).
Figure 166: Accounting and Routing Module (ARM)
Module status LEDs
Service port
Reset
Service port
ARM_001
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.
Physical Description
The ARM (Figure 167) 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.
284 Extreme Networks Consolidated "e" and "i" Series Hardware Installation Guide