Extend System-Id; Disable - Dell Force10 Z9000 Reference Manual

disable

Disable PVST+ globally.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax disable
To enable PVST+, use the no disable command.
Defaults Disabled.
Command Modes CONFIGURATION (conf-pvst)
Command History
Version 8.3.11.1
Version 8.3.7.0
Version 7.6.1.0
Version 7.5.1.0
pre-Version
6.2.1.1
Related
protocol spanning-tree pvst
Commands

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.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax extend system-id
Defaults Disabled
Command Modes PROTOCOL PVST
Command History
Version 8.3.11.1
Version 8.3.7.0
Version 8.3.1.0
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
1168
Introduced on the Z9000.
Introduced on the S4810.
Introduced on the S-Series.
Introduced on the C-Series.
Introduced on the E-Series.
– enter PVST+ mode.
Introduced on the Z9000.
Introduced on the S4810.
Introduced.