Connectivity Guide

ManualsBrandsDell ManualsAccess PlatformsPowerSwitch S4048-ON

221

222

223

224

225

226

227

228

229

230

Table Of Contents

ethernet1/1/17 128.324 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.324

ethernet1/1/18 128.328 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.328

ethernet1/1/19 128.332 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.332

ethernet1/1/20 128.336 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.336

ethernet1/1/21 128.340 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.340

ethernet1/1/22 128.344 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.344

ethernet1/1/23 128.348 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.348

ethernet1/1/24 128.352 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.352

ethernet1/1/25 128.356 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.356

ethernet1/1/26 128.360 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.360

ethernet1/1/27 128.364 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.364

ethernet1/1/28 128.368 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.368

ethernet1/1/29 128.372 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.372

ethernet1/1/30 128.376 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.376

ethernet1/1/31 128.380 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.380

ethernet1/1/32 128.384 128 200000000 BLK 0 32768 90b1.1cf4.a523 128.384

Interface

Name Role PortID Prio Cost Sts Cost Link-type Edge

--------------------------------------------------------------------------

ethernet1/1/1 Disb 128.260 128 200000000 BLK 0 AUTO No

ethernet1/1/2 Disb 128.264 128 200000000 BLK 0 AUTO No

ethernet1/1/3 Disb 128.268 128 200000000 BLK 0 AUTO No

ethernet1/1/4 Disb 128.272 128 200000000 BLK 0 AUTO No

ethernet1/1/5 Root 128.276 128 500 FWD 0 AUTO No

ethernet1/1/6 Altr 128.280 128 500 BLK 0 AUTO No

ethernet1/1/7 Disb 128.284 128 200000000 BLK 0 AUTO No

ethernet1/1/8 Disb 128.288 128 200000000 BLK 0 AUTO No

ethernet1/1/9 Disb 128.292 128 200000000 BLK 0 AUTO No

ethernet1/1/10 Disb 128.296 128 200000000 BLK

Root selection

MSTP determines the root bridge according to the lowest bridge ID. Assign a lower bridge priority to increase its likelihood of becoming the

root bridge.

• Assign a bridge priority number to a specic instance in CONFIGURATION mode, from 0 to 61440 in increments of 4096, default 32768.

Use a lower priority number to increase the likelihood of the bridge to become a root bridge.

spanning-tree mst instance-number priority priority

Assign root bridge priority

OS10(config)# spanning-tree mst 0

Verify root bridge priority

OS10# show spanning-tree active

Spanning tree enabled protocol msti with force-version mst

MSTI 0 VLANs mapped 1,31-4093

Executing IEEE compatible Spanning Tree Protocol

Root ID Priority 32768, Address 3417.4455.667f

Root Bridge hello time 2, max age 20, forward delay 15, max hops 20

Bridge ID Priority 32768, Address 90b1.1cf4.a523

Configured hello time 2, max age 20, forward delay 15, max hops 20

CIST regional root ID Priority 32768, Address 90b1.1cf4.a523

CIST external path cost 500

Interface Designated

Name PortID Prio Cost Sts Cost Bridge ID PortID

---------------------------------------------------------------------------

ethernet1/1/5 128.276 128 500 FWD 0 32768 3417.4455.667f 128.146

ethernet1/1/6 128.280 128 500 BLK 0 32768 3417.4455.667f 128.150

Interface

Name Role PortID Prio Cost Sts Cost Link-type Edge

--------------------------------------------------------------

ethernet1/1/5 Root 128.276 128 500 FWD 0 AUTO No

ethernet1/1/6 Altr 128.280 128 500 BLK 0 AUTO No

Layer 2

221