DELL 9.7(0.0) User Manual

BPDU : sent 121, received 2

The port is not in the Edge port mode

Port 379 (TengigabitEthernet 2/3) is designated Forwarding

Port path cost 20000, Port priority 128, Port Identifier 128.379

Designated root has priority 32768, address 0001.e801.cbb4

Designated bridge has priority 32768, address 0001.e801.cbb4

Designated port id is 128.379, designated path cost 0

Number of transitions to forwarding state 1

BPDU : sent 121, received 5

The port is not in the Edge port mode

Port 380 (TengigabitEthernet 2/4) is designated Forwarding

Port path cost 20000, Port priority 128, Port Identifier 128.380

Designated root has priority 32768, address 0001.e801.cbb4

Designated bridge has priority 32768, address 0001.e801.cbb4

Designated port id is 128.380, designated path cost 0

Number of transitions to forwarding state 1

BPDU : sent 147, received 3

The port is not in the Edge port mode

To confirm that a port is participating in RSTP, use the show spanning-tree rstp brief command 
from EXEC privilege mode.

R3#show spanning-tree rstp brief

Executing IEEE compatible Spanning Tree Protocol

Root ID Priority 32768, Address 0001.e801.cbb4

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

Bridge ID Priority 32768, Address 0001.e80f.1dad

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

Interface                             Designated

Name    PortID  Prio Cost   Sts Cost  Bridge ID             PortID

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

Te 3/1  128.681 128  20000  BLK 20000 32768 0001.e80b.88bd  128.469

Te 3/2  128.682 128  20000  BLK 20000 32768 0001.e80b.88bd  128.470

Te 3/3  128.683 128  20000  FWD 20000 32768 0001.e801.cbb4  128.379

Te 3/4  128.684 128  20000  BLK 20000 32768 0001.e801.cbb4  128.380

Interface

Name    Role  PortID  Prio Cost  Sts Cost   Link-type Edge

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

Te 3/1  Altr  128.681 128 20000  BLK 20000  P2P       No

Te 3/2  Altr  128.682 128 20000  BLK 20000  P2P       No

Te 3/3  Root  128.683 128 20000  FWD 20000  P2P       No

Te 3/4  Altr  128.684 128 20000  BLK 20000  P2P       No

R3#

Adding and Removing Interfaces

To add and remove interfaces, use the following commands.

To add an interface to the Rapid Spanning Tree topology, configure it for Layer 2 and it is automatically 

added. If you previously disabled RSTP on the interface using the command no spanning-tree 0 

command, re-enable it using the spanning-tree 0 command.

• Remove an interface from the Rapid Spanning Tree topology.

no spanning-tree 0

Rapid Spanning Tree Protocol (RSTP)

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