Administrator Guide

Version Description
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
pre- 6.2.1.1 Introduced on the E-Series.
Related Commands
• protocol spanning-tree pvst — enter PVST+ mode.
extend system-id
To augment the Bridge ID with a VLAN ID so that PVST+ dierentiate 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.
S3048
Syntax
extend system-id
Defaults Disabled
Command Modes PROTOCOL PVST
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.3.1.0 Introduced.
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
Name PortID Prio Cost Sts Cost Bridge ID PortID
-------------------------------------------------------------
Per-VLAN Spanning Tree Plus (PVST+) 1243