Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

To verify that RSTP is enabled, use the show config command from PROTOCOL SPANNING TREE RSTP mode. The bold line indicates that RSTP is enabled.

Example of Verifying that RSTP is Enabled

Dell(conf-rstp)#show config
                                 !
                                 
                                 protocol spanning-tree rstp
                                 no disable
                                 Dell(conf-rstp)#
                              

Figure 1. Rapid Spanning Tree Enabled Globally

To view the interfaces participating in RSTP, use the show spanning-tree rstp command from EXEC privilege mode. If a physical interface is part of a port channel, only the port channel is listed in the command output.

Example of the show spanning-tree rstp Command

Dell#show spanning-tree rstp
                                 Root Identifier has priority 32768, Address 0001.e801.cbb4
                                 Root Bridge hello time 2, max age 20, forward delay 15, max hops 0
                                 Bridge Identifier has priority 32768, Address 0001.e801.cbb4
                                 Configured hello time 2, max age 20, forward delay 15, max hops 0
                                 We are the root
                                 Current root has priority 32768, Address 0001.e801.cbb4
                                 Number of topology changes 4, last change occurred 00:02:17 ago on TenGig 1/26
                                 
                                 Port 377 (TenGigabitethernet 2/1) is designated Forwarding
                                 Port path cost 20000, Port priority 128, Port Identifier 128.377
                                 Designated root has priority 32768, address 0001.e801.cbb4
                                 Designated bridge has priority 32768, address 0001.e801.cbb4
                                 Designated port id is 128.377, designated path cost 0
                                 Number of transitions to forwarding state 1
                                 BPDU : sent 121, received 9
                                 The port is not in the Edge port mode, bpdu filter is disabled
                                 
                                 Port 378 (TenGigabitethernet 2/2) is designated Forwarding
                                 Port path cost 20000, Port priority 128, Port Identifier 128.378
                                 Designated root has priority 32768, address 0001.e801.cbb4
                                 Designated bridge has priority 32768, address 0001.e801.cbb4
                                 Designated port id is 128.378, designated path cost 0
                                 Number of transitions to forwarding state 1
                                 BPDU : sent 121, received 2
                                 The port is not in the Edge port mode, bpdu filter is disabled
                                 
                                 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, bpdu filter is disabled
                                 
                                 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, bpdu filter is disabled
                                 
                                 Dell#
                              

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

Example of the show spanning-tree rstp brief Command

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
                                 ---------- -------- ----   ------- --- ------- ------------- --------
                                 TenGig 3/1  128.681 128  20000  BLK 20000 32768 0001.e80b.88bd  128.469
                                 TenGig 3/2  128.682 128  20000  BLK 20000 32768 0001.e80b.88bd  128.470
                                 TenGig 3/3  128.683 128  20000  FWD 20000 32768 0001.e801.cbb4  128.379
                                 TenGig 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 Bpdu
                                 Filter
                                 ------- --- ------ -------- ---- ------- --- ----------- ----- ----
                                 TenGig 3/1  Altr  128.681 128 20000  BLK 20000  P2P       No   No
                                 TenGig 3/2  Altr  128.682 128 20000  BLK 20000  P2P       No   No
                                 TenGig 3/3  Root  128.683 128 20000  FWD 20000  P2P       No   No
                                 TenGig 3/4  Altr  128.684 128 20000  BLK 20000  P2P       No   No
                                 R3#