Dell Force10 S55T FTOS Command Line Reference Guide for the S55 System FTOS 8. - Page 796
description, extend system-id
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www.dell.com | support.dell.com Defaults PVST+ is disabled Command Modes CONFIGURATION (conf-pvst) Command History Version 8.3.5.0 Version 7.6.1.0 Version 7.5.1.0 pre-Version 6.2.1.1 Introduced on S55 Support added for S-Series Support added for C-Series Introduced on E-Series Related Commands protocol spanning-tree pvst Enter PVST+ mode. description c e s Enter a description of the PVST+ Syntax Parameters description {description} To remove the description, use the no description {description} command. description Enter a description to identify the Spanning Tree (80 characters maximum). Defaults Command Modes Command History No default behavior or values SPANNING TREE PVST+ (The prompt is "config-pvst".) Version 8.3.5.0 pre-7.7.1.0 Introduced on S55 Introduced Related Commands protocol spanning-tree pvst Enter SPANNING TREE mode on the switch. extend system-id c e s 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. Syntax extend system-id Defaults Disabled Command Modes PROTOCOL PVST Command History Version 8.3.5.0 Version 8.3.1.0 Introduced on S55 Introduced 796 | Per-VLAN Spanning Tree plus (PVST+)