1.9.3.3 Fan Module ......................................................................................................................................................... 181

1.9.3.4 Air Filter ............................................................................................................................................................. 183

1.9.4 Heat Dissipation System of the NE40E-X8A ........................................................................................................ 184

1.9.4.1 System Air Channel ............................................................................................................................................ 184

1.9.4.2 Fan Speed Adjustment ........................................................................................................................................ 185

1.9.4.3 Fan Module ......................................................................................................................................................... 185

1.9.4.4 Air filter .............................................................................................................................................................. 187

1.9.5 Heat Dissipation System of the NE40E-X16 ......................................................................................................... 188

1.9.5.1 System Air Channel ............................................................................................................................................ 188

1.9.5.2 Fan Speed Adjustment ........................................................................................................................................ 188

1.9.5.3 Fan Module ......................................................................................................................................................... 189

1.9.5.4 Air Filter ............................................................................................................................................................. 191

1.9.6 Heat Dissipation System of the NE40E-X16A ...................................................................................................... 192

1.9.6.1 System Air Channel ............................................................................................................................................ 192

1.9.6.2 Fan Speed Adjustment ........................................................................................................................................ 193

1.9.6.3 Fan Module ......................................................................................................................................................... 194

1.9.6.4 Air Filter ............................................................................................................................................................. 196

1.10 Boards ..................................................................................................................................................................... 197

1.10.1 Overview ............................................................................................................................................................. 198

1.10.1.1 Board Structure ................................................................................................................................................. 198

1.10.1.2 Board and Subcard Specifications .................................................................................................................... 200

1.10.1.3 Filler Panel ........................................................................................................................................................ 204

1.10.1.4 Rules for Numbering Slots and Interfaces ........................................................................................................ 205

1.10.1.5 Bar Code for Boards ......................................................................................................................................... 209

1.10.2 Control Plane ....................................................................................................................................................... 210

1.10.2.1 Introduction to the Control Plane ...................................................................................................................... 210

1.10.2.2 Main Processing Unit D2(Including 2G Memory and 2G USB) ...................................................................... 211

1.10.2.3 Main Processing Unit D3(Including 4G Memory and 2G USB) ...................................................................... 214

1.10.2.4 Main Processing Unit D4 .................................................................................................................................. 218

1.10.2.5 Main Processing Unit D4(16G Memory).......................................................................................................... 222

1.10.2.6 Switch and Route Processing Unit A5 .............................................................................................................. 226

1.10.2.7 Switch and Route Processing Unit A7 .............................................................................................................. 230

1.10.2.8 Switch and Route Processing Unit B5 .............................................................................................................. 234

1.10.2.9 Switch and Route Processing Unit A8 .............................................................................................................. 238

1.10.2.10 Switch and Route Processing Unit A8(16G Memory) .................................................................................... 242

1.10.2.11 Switch and Route Processing Unit A9 ............................................................................................................ 246

1.10.2.12 Switch and Route Processing Unit A9(16G Memory) .................................................................................... 249

1.10.2.13 Main Processing Unit B4 ................................................................................................................................ 253

1.10.2.14 Main Processing Unit B5 ................................................................................................................................ 257

1.10.2.15 Main Processing Unit B5(16G Memory) ........................................................................................................ 261

1.10.2.16 Main Processing Unit B6 ................................................................................................................................ 265

1.10.3 Switching Network .............................................................................................................................................. 270

Issue 01 (2018-05-03)

Contents

Table of Contents