Default Ethernet Interface Configuration - Cisco Catalyst 3750-X Software Configuration Manual

Chapter 13 Configuring Interface Characteristics

Default Ethernet Interface Configuration

Table 13-3
to Layer 2 interfaces. For more details on the VLAN parameters listed in the table, see
"Configuring VLANs."
Port-Based Traffic Control."
To configure Layer 2 parameters, if the interface is in Layer 3 mode, you must enter the switchport
Note
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. When you put an interface that is in Layer 3 mode into Layer 2 mode, the
previous configuration information related to the affected interface might be lost, and the interface is
returned to its default configuration.
Table 13-3 Default Layer 2 Ethernet Interface Configuration
Feature
Operating mode
Allowed VLAN range
Default VLAN (for access ports)
Native VLAN (for IEEE 802.1Q trunks)
VLAN trunking
Port enable state
Port description
Speed
Duplex mode
Flow control
EtherChannel (PAgP)
Port blocking (unknown multicast and
unknown unicast traffic)
Broadcast, multicast, and unicast storm
control
Protected port
Port security
Port Fast
OL-21521-01
shows the Ethernet interface default configuration, including some features that apply only
For details on controlling traffic to the port, see
Default Setting
Layer 2 or switching mode (switchport command).
VLANs 1– 4094.
VLAN 1 (Layer 2 interfaces only).
VLAN 1 (Layer 2 interfaces only).
Switchport mode dynamic auto (supports DTP) (Layer 2 interfaces only).
All ports are enabled.
None defined.
Autonegotiate. (Not supported on the 10-Gigabit interfaces.)
Autonegotiate. (Not supported on the 10-Gigabit interfaces.)
Flow control is set to receive: off. It is always off for sent packets.
Disabled on all Ethernet ports. See
Link-State Tracking."
Disabled (not blocked) (Layer 2 interfaces only). See the
Blocking" section on page
Disabled. See the
Disabled (Layer 2 interfaces only). See the
section on page
Disabled (Layer 2 interfaces only). See the
Configuration" section on page
Disabled. See the
page 22-12.
Chapter 40, "Configuring EtherChannels and
28-7.
"Default Storm Control Configuration" section on page
28-6.
28-11.
"Default Optional Spanning-Tree Configuration" section on
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Configuring Ethernet Interfaces
Chapter 15,
Chapter 28, "Configuring
"Configuring Port
"Configuring Protected Ports"
"Default Port Security
28-3.
13-27