Usage Information

Example (Brief)

Example (EDS, LBK)

VersionDescription

7.6.1.0Introduced on the S-Series.

7.5.1.0Introduced on the C-Series.

6.4.1.0Expanded to display the port error disable state (EDS) caused by loopback BPDU inconsistency.

6.2.1.1Introduced on the E-Series.

The following describes the show spanning-tree rstp guard command shown in the following example.

Field

Description

Interface Name

RSTP interface.

Instance

RSTP instance.

Sts

Port state: root-inconsistent (INCON Root), forwarding

 

(FWD), listening (LIS), blocking (BLK), disabled (DIS), or shut

 

down (EDS Shut).

Guard Type

Types of STP guard configured (Root, Loop, or BPDU guard)

Dell#show spanning-tree rstp

brief

 

 

 

Executing IEEE compatible Spanning Tree Protocol

 

Root ID Priority 8192, Address 0001.e805.e306

 

Root Bridge hello time 4, max age 20, forward delay 15

Bridge ID Priority

16384, Address 0001.e801.6aa8

 

Configured hello time 2, max

age 20, forward delay 15

Interface

Cost Sts Cost

Designated

PortID

Name

PortID Prio

Bridge ID

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

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

Te 4/2

128.418 128

20000 FWD

20000 16384 0001.e801.6aa8 128.418

Te 4/1

128.419 128

20000 FWD

20000 16384 0001.e801.6aa8 128.419

Te 4/8

128.426 128

20000 FWD

20000 8192

0001.e805.e306 128.130

Te 4/9

128.427 128

20000 BLK

20000 8192

0001.e805.e306 128.131

Interface

Prio Cost

Sts Cost

 

Link-type Edge

Name

Role PortID

 

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

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

Te 4/2 Desg 128.418 128 20000 FWD 20000

P2P

Yes

Te 4/1 Desg 128.419 128 20000 FWD 20000

P2P

Yes

Te 4/8 Root 128.426 128 20000 FWD 20000

P2P

No

Te 4/9 Altr 128.427 128 20000 BLK 20000

P2P

No

Dell#

 

 

 

 

 

 

NOTE: “LBK_INC” (bold) means Loopback BPDU Inconsistency.

Dell#show spanning-tree rstp br

Executing IEEE compatible Spanning Tree Protocol Root ID Priority 32768, Address 0001.e801.6aa8

Root Bridge hello time 2, max age 20, forward delay 15 Bridge ID Priority 32768, Address 0001.e801.6aa8

We are the root

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

Interface

Designated

Name PortID Prio Cost Sts Cost

Bridge ID PortID

Rapid Spanning Tree Protocol (RSTP)

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Dell 9.7(0.0) manual Down EDS Shut, Te 4/1 Desg 128.419 128 20000 FWD, Te 4/8 Root 128.426 128 20000 FWD