API Guide
VLAN 1
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 4097, Address 90b1.1cf4.a523
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 4097, Address 90b1.1cf4.a523
We are the root of VLAN 1
Configured hello time 2, max age 20, forward delay 15
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
---------------------------------------------------------------------------------
ethernet1/1/1 128.260 128 200000000 FWD 0 32769 0000.0000.0000 128.260
ethernet1/1/2 128.264 128 200000000 FWD 0 32769 0000.0000.0000 128.264
ethernet1/1/3 128.268 128 200000000 FWD 0 32769 0000.0000.0000 128.268
ethernet1/1/4 128.272 128 200000000 FWD 0 32769 0000.0000.0000 128.272
ethernet1/1/5 128.276 128 500 FWD 0 4097 90b1.1cf4.a523 128.276
ethernet1/1/6 128.280 128 500 FWD 0 4097 90b1.1cf4.a523 128.280
ethernet1/1/7 128.284 128 200000000 FWD 0 32769 0000.0000.0000 128.284
ethernet1/1/8 128.288 128 200000000 FWD 0 32769 0000.0000.0000 128.288
ethernet1/1/9 128.292 128 200000000 FWD 0 32769 0000.0000.0000 128.292
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
Rapid-PVST assigns the root bridge according to the lowest bridge ID. Primary configuration assigns 24576 as the bridge
priority whereas secondary configuration assigns 28672 as the bridge priority.
spanning-tree vlan vlan-id root primary command ensures that the switch has the lowest bridge priority value by
setting the predefined value of 24,576. If an alternate root bridge is required, use the spanning-tree vlan vlan-id
root secondary command. The command sets the priority for the switch to the predefined value of 28,672. If the primary
root bridge fails, the command ensures that the alternate switch becomes the root bridge. It also assumes that the other
switches in the network have a defined default priority value of 32,768.
482
Layer 2