Dell Command Line Reference Guide for the S4048–ON System 9.14.2.8

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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.

S4048

Syntax
extend system-id
Defaults
Disabled
Command Modes
PROTOCOL PVST
Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100-ON.
9.8(2.0)
Introduced on the S3100 series.
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
DellEMC(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
-------------------------------------------------------------
Te 0/10 128.140 128  200000 FWD 0   32773 0001.e832.73f7 128.140
Te 0/12 128.142 128  200000 DIS 0   32773 0001.e832.73f7 128.142

Interface
Name     Role PortID  Prio  Cost  Sts Cost Link-type Edge
--------------------------------------------------------
Te 1/10  Desg 128.140 128  200000 FWD 0    P2P       No
Te 1/12  Dis  128.142 128  200000 DIS 0    P2P       No
DellEMC(conf-pvst)#
Related Commands

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