Example (Guard)

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

Te 1/1 128.257 128 20000 EDS 0 32768 0001.e801.6aa8 128.257 Interface

Name Role PortID

Prio Cost Sts Cost Link-type Edge

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

Te 1/1 ErrDis 128.257 128 20000 EDS 0 P2P No

Dell#show spanning-tree rstp

Root Identifier has priority 32768, Address 0001.e801.6aa8 Root Bridge hello time 2, max age 20, forward delay 15, max hops 0

Bridge Identifier has priority 32768, Address 0001.e801.6aa8 Configured hello time 2, max age 20, forward delay 15, max hops 0

We are the root

Current root has priority 32768, Address 0001.e801.6aa8 Number of topology changes 1, last change occurred 00:00:31 ago on Te 1/1

Port 257 (TenGigabitEthernet 1/1) is LBK_INC Discarding Port path cost 20000, Port priority 128, Port Identifier 128.257

Designated root has priority 32768, address 0001.e801.6aa8 Designated bridge has priority 32768, address 0001.e801.6aa8 Designated port id is 128.257, designated path cost 0 Number of transitions to forwarding state 1

BPDU : sent 27, received 9

The port is not in the Edge port mode

Dell#show spanning-tree rstp guard

Interface

 

Guard type

Name

Instance Sts

Te---------1/1

0

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

INCON(Root) Rootguard

Te 1/2

0

FWD

Loopguard

Te 1/3

0

BLK

Bpduguard

spanning-tree rstp

Configure an RSTP interface with one of these settings: port cost, edge port with optional bridge port data unit (BPDU) guard, port priority, loop guard, or root guard.

Syntaxspanning-tree rstp {cost port-cost edge-port [bpduguard [shutdown-on-violation]] priority priority {loopguard rootguard}}

Parameters

cost port-costEnter the keyword cost then the port cost value. The range is from 1 to 200000. The defaults are:

100 Mb/s Ethernet interface = 200000

1-Gigabit Ethernet interface = 20000

10-Gigabit Ethernet interface = 2000

Port Channel interface with one 100 Mb/s Ethernet = 200000

Port Channel interface with one 1 Gigabit Ethernet = 20000

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Rapid Spanning Tree Protocol (RSTP)

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Dell 9.7(0.0) manual Spanning-tree rstp, Blk