Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1058
OpenFlow use cases
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Table 111. Supported error types (continued) Error types OFPQOFC_EPERM = 2 Supported/Not supported Not supported Switch configuration failed code OFPSCFC_BAD_FLAGS = 0 OFPSCFC_BAD_LEN = 1 OFPSCFC_EPERM = 2 Not supported Not supported Not supported Role request failed code OFPRRFC_STALE = 0 OFPRRFC_UNSUP = 1 OFPRRFC_BAD_ROLE = 2 Not supported Not supported Not supported Table features failed code OFPTFFC_BAD_TABLE = 0 OFPTFFC_BAD_METADATA = 1 OFPTFFC_BAD_TYPE = 2 OFPTFFC_BAD_LEN = 3 OFPTFFC_BAD_ARGUMENT = 4 OFPTFFC_EPERM = 5 Supported Not supported Not supported Not supported Not supported Not supported OpenFlow use cases OS10 OpenFlow protocol support allows the flexibility of using vendor-neutral applications and to use applications that you create. For example, the OS10 OpenFlow implementation supports L2 applications similar to the ones found in the following websites: • https://github.com/osrg/ryu/tree/master/ryu/app (only L2 applications are supported) • https://github.com/osrg/ryu/tree/master/ryu/app NOTE: OS10 supports applications based on OpenFlow versions 1.0 and 1.3. • Switching loop removal Consider the case of a single broadcast domain where switching loops are common. This issue occurs because of redundant paths in an L2 network. Switching loops create broadcast storms with broadcasts and multicasts being forwarded out of every switch port. Every switch in the network repeatedly re-broadcasts the messages and floods the entire network. To solve broadcast storms in an OpenFlow network, a centralized controller makes all the control plane decisions and manages the switches. The controller has the complete view of the topology. MAC address learning is centralized. OpenFlow identifies the correct path and forwards the packets to the relevant switch thereby avoiding switching loops. • Reactive flow installation Consider the case of dynamic learning of flows for bidirectional traffic. Flows are learnt as and when a packet arrives. 1058 OpenFlow
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1,190
-
1,191
-
1,192
-
1,193
-
1,194
-
1,195
-
1,196
-
1,197
-
1,198
-
1,199
-
1,200
-
1,201
-
1,202
-
1,203
-
1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234
-
1,235
-
1,236
-
1,237
-
1,238
-
1,239
-
1,240
-
1,241
-
1,242
-
1,243
-
1,244
-
1,245
-
1,246
-
1,247
-
1,248
-
1,249
-
1,250
-
1,251
-
1,252
-
1,253
-
1,254
-
1,255
-
1,256
-
1,257
-
1,258
-
1,259
-
1,260
-
1,261
-
1,262
-
1,263
-
1,264
-
1,265
-
1,266
-
1,267
-
1,268
-
1,269
-
1,270
-
1,271
-
1,272
-
1,273
-
1,274
-
1,275
-
1,276
-
1,277
-
1,278
-
1,279
-
1,280
-
1,281
-
1,282
-
1,283
-
1,284
-
1,285
-
1,286
-
1,287
-
1,288
-
1,289
-
1,290
-
1,291
-
1,292
-
1,293
-
1,294
-
1,295
-
1,296
-
1,297
-
1,298
-
1,299
-
1,300
-
1,301
-
1,302
-
1,303
-
1,304
-
1,305
-
1,306
-
1,307
-
1,308
-
1,309
-
1,310
-
1,311
-
1,312
-
1,313
-
1,314
-
1,315
-
1,316
-
1,317
-
1,318
-
1,319
-
1,320
-
1,321
-
1,322
-
1,323
-
1,324
-
1,325
-
1,326
-
1,327
-
1,328
-
1,329
-
1,330
-
1,331
-
1,332
-
1,333
-
1,334
-
1,335
-
1,336
-
1,337
-
1,338
-
1,339
-
1,340
-
1,341
-
1,342
-
1,343
-
1,344
-
1,345
-
1,346
-
1,347
-
1,348
-
1,349
-
1,350
-
1,351
-
1,352
-
1,353
-
1,354
-
1,355
-
1,356
-
1,357
-
1,358
-
1,359
-
1,360
-
1,361
-
1,362
-
1,363
-
1,364
-
1,365
-
1,366
-
1,367
-
1,368
-
1,369
-
1,370
-
1,371
-
1,372
-
1,373
-
1,374
-
1,375
-
1,376
-
1,377
-
1,378
-
1,379
-
1,380
-
1,381
-
1,382
-
1,383
-
1,384
-
1,385
-
1,386
-
1,387
-
1,388
-
1,389
-
1,390
-
1,391
-
1,392
-
1,393
-
1,394
-
1,395
-
1,396
-
1,397
-
1,398
-
1,399
-
1,400
-
1,401
-
1,402
-
1,403
-
1,404
-
1,405
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![](/manual_guide/products/dell-mx5108n-emc-smartfabric-os10-user-guide-release-1050-89c4d24/1058.png)