Connectivity Guide

ethernet1/1/10 128.296 128 200000000 FWD 0 32769 0000.0000.0000 128.296
ethernet1/1/11 128.300 128 200000000 FWD 0 32769 0000.0000.0000 128.300
ethernet1/1/12 128.304 128 200000000 FWD 0 32769 0000.0000.0000 128.304
ethernet1/1/13 128.308 128 200000000 FWD 0 32769 0000.0000.0000 128.308
ethernet1/1/14 128.312 128 200000000 FWD 0 32769 0000.0000.0000 128.312
ethernet1/1/15 128.316 128 200000000 FWD 0 32769 0000.0000.0000 128.316
ethernet1/1/16 128.320 128 200000000 FWD 0 32769 0000.0000.0000 128.320
ethernet1/1/17 128.324 128 200000000 FWD 0 32769 0000.0000.0000 128.324
ethernet1/1/18 128.328 128 200000000 FWD 0 32769 0000.0000.0000 128.328
ethernet1/1/19 128.332 128 200000000 FWD 0 32769 0000.0000.0000 128.332
ethernet1/1/20 128.336 128 200000000 FWD 0 32769 0000.0000.0000 128.336
ethernet1/1/21 128.340 128 200000000 FWD 0 32769 0000.0000.0000 128.340
ethernet1/1/22 128.344 128 200000000 FWD 0 32769 0000.0000.0000 128.344
ethernet1/1/23 128.348 128 200000000 FWD 0 32769 0000.0000.0000 128.348
ethernet1/1/24 128.352 128 200000000 FWD 0 32769 0000.0000.0000 128.352
ethernet1/1/25 128.356 128 200000000 FWD 0 32769 0000.0000.0000 128.356
ethernet1/1/26 128.360 128 200000000 FWD 0 32769 0000.0000.0000 128.360
ethernet1/1/27 128.364 128 200000000 FWD 0 32769 0000.0000.0000 128.364
ethernet1/1/28 128.368 128 200000000 FWD 0 32769 0000.0000.0000 128.368
ethernet1/1/29 128.372 128 200000000 FWD 0 32769 0000.0000.0000 128.372
ethernet1/1/30 128.376 128 200000000 FWD 0 32769 0000.0000.0000 128.376
ethernet1/1/31 128.380 128 200000000 FWD 0 32769 0000.0000.0000 128.380
ethernet1/1/32 128.384 128 200000000 FWD 0 32769 0000.0000.0000 128.384
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
-----------------------------------------------------------------------
ethernet1/1/1 Disb 128.260 128 200000000 FWD 0 AUTO No
ethernet1/1/2 Disb 128.264 128 200000000 FWD 0 AUTO No
ethernet1/1/3 Disb 128.268 128 200000000 FWD 0 AUTO No
ethernet1/1/4 Disb 128.272 128 200000000 FWD 0 AUTO No
ethernet1/1/5 Desg 128.276 128 500 FWD 0 AUTO No
ethernet1/1/6 Desg 128.280 128 500 FWD 0 AUTO No
ethernet1/1/7 Disb 128.284 128 200000000 FWD 0 AUTO No
ethernet1/1/8 Disb 128.288 128 200000000 FWD 0 AUTO No
ethernet1/1/9 Disb 128.292 128 200000000 FWD 0 AUTO No
ethernet1/1/10 Disb 128.296 128 200000000 FWD 0 AUTO No
ethernet1/1/11 Disb 128.300 128 200000000 FWD 0 AUTO No
Root assignment
RPVST+ assigns the root bridge according to the lowest bridge ID. Assign one bridge as the root bridge and the other as a secondary root
bridge.
• Congure the device as the root or secondary root in CONFIGURATION mode.
spanning-tree vlan vlan-id root {primary | secondary}
– vlan-id — Enter the VLAN ID number, from 1 to 4093.
– primary — Enter the bridge as primary or root bridge. The primary bridge value is 24576.
– secondary — Enter the bridge as secondary or secondary root bridge. The secondary bridge value is 28672.
Congure root bridge as primary
OS10(config)# spanning-tree vlan 1 root primary
Verify root bridge information
OS10# show spanning-tree active
Spanning tree enabled protocol rapid-pvst with force-version rstp
VLAN 1
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 24577, Address 90b1.1cf4.a523
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 24577, Address 90b1.1cf4.a523
We are the root of VLAN 1
342
Layer 2