Command Line Reference Guide

Defaults Disabled.
Command Modes CONFIGURATION (conf-pvst)
Command History
Version 9.0(1.3) Introduced on the S5000.
Related
Commands
protocol spanning-tree pvst – enter PVST+ mode.
extend system-id
Use extend system ID to augment the Bridge ID with a VLAN ID so that PVST+ differentiate between BPDUs for each
VLAN. If for some reason on VLAN receives a BPDU meant for another VLAN, PVST+ will then not detect a loop, and
both ports can remain in forwarding state.
S5000
Syntax
extend system-id
Defaults Disabled
Command Modes PROTOCOL PVST
Command History
Version 9.0(1.3) Introduced on the S5000.
Example
FTOS(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 0/10 Desg 128.140 128 200000 FWD 0 P2P No
Te 0/12 Dis 128.142 128 200000 DIS 0 P2P No
Related
Commands
protocol spanning-tree pvst – enter SPANNING TREE mode on the switch.
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