Nortel Networks 207344-B manual Physical Description of the Switch Modules

Using the Centillion EtherSpeedII Switch Modules

MPOA is the ATM Forum standard that specifies a method to efficiently transport intersubnet unicast data in a LAN emulation (LANE) environment. MPOA uses LANE and Next Hop Resolution Protocol (NHRP) processes to allow direct shortcut virtual channel connections (VCCs) to be established for intersubnet communication without requiring passage through a router. The intrasubnet communication continues to be supported over LANE. For IP, Nortel Networks has adopted MPOA as the standard to implement layer 3 switching in an ATM network.

•Improved performance in segmentation and reassembly (SAR) performance to 3.2 gigabits per second (Gb/s).

•MultiLink Trunking (MLT)

Physical Description of the Switch Modules

The EtherSpeedII 10/100BASE-T switch module (Figure 1-2) consists of a printed circuit board with a metal module faceplate. The switch module includes captive retaining screws and inserter/extractor levers on the top and bottom of the front panel.

Captive retaining

screws LEDs

Inserter/extractor levers

20 10/100BASE-T ports (RJ-45)

Backplane connector

Printed circuit board

9454FA

Figure 1-2. EtherSpeedII 10/100BASE-T 20-Port Switch Module

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