Cisco Catalyst 2960-XR Configuration Guide

Beginning in privileged EXEC mode, follow these steps to enable PortFast on the switch.
SUMMARY STEPS
1.
configure terminal
2.
interface interface-id
3.
spanning-tree portfast [trunk]
4.
end
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 1
Specifies an interface to configure, and enters interface configuration
mode.
interface interface-id
Example:
Switch(config)# interface
Step 2
gigabitethernet1/0/2
Enables PortFast on an access port connected to a single workstation or
server. By specifying the trunk keyword, you can enable PortFast on a
trunk port.
spanning-tree portfast [trunk]
Example:
Switch(config-if)# spanning-tree
Step 3
To enable PortFast on trunk ports, you must use the
spanning-tree portfast trunk interface configuration command.
The spanning-tree portfast command will not work on trunk
ports.
Make sure that there are no loops in the network between the
trunk port and the workstation or server before you enable
PortFast on a trunk port.
Note
By default, PortFast is disabled on all interfaces.
portfast trunk
Returns to privileged EXEC mode.end
Example:
Switch(config-if)# end
Step 4
What to Do Next
You can use the spanning-tree portfast default global configuration command to globally enable the PortFast
feature on all nontrunking ports.
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
OL-29424-01 91
Configuring Optional Spanning-Tree Features
Enabling PortFast

Cisco Catalyst 2960-XR Specifications

General

Stacking Bandwidth	80 Gbps
Layer Support	Layer 2 and Layer 3
Jumbo Frame Support	9198 bytes
RAM	512 MB
Input Voltage	100-240V AC
Model	Catalyst 2960-XR
Uplink Interfaces	4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces	24 or 48 x Gigabit Ethernet ports
Power Supply	Internal
MAC Address Table Size	16, 000 entries
PoE	Available on PoE models
Weight	4.5 kg
Features	energy efficiency
Stacking	Up to 8 switches
Operating Temperature	0 to 45°C