Cisco Systems 2960 Manual De Usuario
18-12
Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 18 Configuring Optional Spanning-Tree Features
Configuring Optional Spanning-Tree Features
Configuring Optional Spanning-Tree Features
These sections contain this configuration information:
•
•
•
(optional)
•
(optional)
•
(optional)
•
(optional)
•
(optional)
•
(optional)
•
(optional)
•
(optional)
•
(optional)
Default Optional Spanning-Tree Configuration
shows the default optional spanning-tree configuration.
Optional Spanning-Tree Configuration Guidelines
You can configure PortFast, BPDU guard, BPDU filtering, EtherChannel guard, root guard, or loop
guard if your switch is running PVST+, rapid PVST+, or MSTP.
guard if your switch is running PVST+, rapid PVST+, or MSTP.
You can configure the UplinkFast, the BackboneFast, or the cross-stack UplinkFast feature for rapid
PVST+ or for the MSTP, but the feature remains disabled (inactive) until you change the spanning-tree
mode to PVST+.
PVST+ or for the MSTP, but the feature remains disabled (inactive) until you change the spanning-tree
mode to PVST+.
You can configure the UplinkFast or the BackboneFast feature for rapid PVST+ or for the MSTP, but the
feature remains disabled (inactive) until you change the spanning-tree mode to PVST+.
feature remains disabled (inactive) until you change the spanning-tree mode to PVST+.
Table 18-1
Default Optional Spanning-Tree Configuration
Feature
Default Setting
Port Fast, BPDU filtering, BPDU guard
Globally disabled (unless they are individually configured
per interface).
per interface).
UplinkFast
Globally disabled. (On Catalyst 2960-Sswitches, the
UplinkFast feature is the CSUF feature.)
UplinkFast feature is the CSUF feature.)
BackboneFast
Globally disabled.
EtherChannel guard
Globally enabled.
Root guard
Disabled on all interfaces.
Loop guard
Disabled on all interfaces.