Default Ethernet Interface Configuration; Configuring Ethernet Interfaces - Cisco Catalyst 3750 Software Configuration Manual

Chapter 9 Configuring Interface Characteristics
This example shows how to delete the interface-range macro enet_list and to verify that it was deleted.
Switch# configure terminal
Switch(config)# no define interface-range enet_list
Switch(config)# end
Switch# show run | include define
Switch#

Configuring Ethernet Interfaces

These sections describe the default interface configuration and the optional features that you can
configure on most physical interfaces:
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Default Ethernet Interface Configuration

Table 9-1
Layer 2 interfaces. For more details on the VLAN parameters listed in the table, see
"Configuring VLANs."
Port-Based Traffic Control."
Note To configure Layer 2 parameters, if the interface is in Layer 3 mode, you must enter the switchport
interface configuration command without any parameters to put the interface into Layer 2 mode. This
shuts down the interface and then re-enables it, which might generate messages on the device to which
the interface is connected. Furthermore, when you use this command to put the interface into Layer 2
mode, you are deleting any Layer 3 characteristics configured on the interface.
Table 9-1
Feature
Operating mode
Allowed VLAN range
Default VLAN (for access ports)
Native VLAN (for 802.1Q trunks) VLAN 1 (Layer 2 interfaces only).
VLAN trunking
Port enable state
Port description
Speed
Duplex mode
78-15870-01
Default Ethernet Interface Configuration, page 9-11
Configuring Interface Speed and Duplex Mode, page 9-12
Configuring IEEE 802.3z Flow Control, page 9-15
Configuring Auto-MDIX on a Port, page 9-16
Adding a Description for an Interface, page 9-17
shows the Ethernet interface default configuration, including some features that apply only to
For details on controlling traffic to the port, see
Default Layer 2 Ethernet Interface Configuration
Default Setting
Layer 2 or switching mode (switchport command).
VLANs 1 – 4094.
VLAN 1 (Layer 2 interfaces only).
Switchport mode dynamic auto (supports DTP)
(Layer 2 interfaces only).
All ports are enabled.
None defined.
Autonegotiate.
Autonegotiate.
Catalyst 3750 Metro Switch Software Configuration Guide
Configuring Ethernet Interfaces
Chapter 10,
Chapter 18, "Configuring
9-11