Dell 9.7(0.0) manual Extend system-id, Dellconf-pvst#do show spanning-tree pvst vlan 5 brief, Vlan

extend system-id

To augment the Bridge ID with a VLAN ID so that PVST+ differentiate between BPDUs for each VLAN, use extend system ID. If the VLAN receives a BPDU meant for another VLAN, PVST+ does not detect a loop, and both ports can remain in Forwarding state.

S6000

Syntax	extend system-id
Defaults	Disabled
Command	PROTOCOL PVST
Modes
Command	This guide is platform-specific. For command information about other platforms,
History	refer to the relevant Dell Networking OS Command Line Reference Guide.
	The following is a list of the Dell Networking OS version history for this command.

VersionDescription

9.7(0.0) Introduced on the S6000-ON.

9.0.2.0Introduced on the S6000.

8.3.19.0Introduced on the S4820T.

8.3.11.1Introduced on the Z9000.

8.3.7.0Introduced on the S4810.

8.3.1.0Introduced.

Example	Dell(conf-pvst)#do show spanning-tree pvst vlan 5 brief
	VLAN 5
	Executing IEEE compatible Spanning Tree Protocol
	Root ID	Priority 32773, Address 0001.e832.73f7
	Root Bridge hello time 2, max age 20, forward delay 15
	Bridge ID Priority 32773 (priority 32768 sys-id-ext 5),
	Address	0001.e832.73f7
	We are the root of Vlan 5
	Configured hello time 2, max age 20, forward delay 15
	Interface Designated			Cost	Sts Cost Bridge ID			PortID
	Name	PortID	Prio
	-------------------------------------------------------------
	Te 0/10	128.140 128		200000 FWD 0		32773 0001.e832.73f7
	128.140	128.142 128		200000 DIS 0		32773 0001.e832.73f7
	Te 0/12
	128.142
	Interface			Prio	Cost	Sts Cost Link-type Edge
	Name	Role PortID
	--------------------------------------------------------
	Te 1/10	Desg 128.140 128			200000 FWD 0		P2P	No
	Te 1/12	Dis	128.142 128		200000 DIS 0		P2P	No

1230 Per-VLAN Spanning Tree Plus (PVST+)