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Configuring Ethernet Interfaces
Configuring Ethernet Interfaces
These sections contain this configuration information:
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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."
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 9-1
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)
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
9-12
Default Ethernet Interface Configuration, page 9-12
Setting the Type of a Dual-Purpose Uplink Port, page 9-13
Configuring Interface Speed and Duplex Mode, page 9-15
Configuring IEEE 802.3x Flow Control, page 9-17
Configuring Auto-MDIX on an Interface, page 9-18
Adding a Description for an Interface, page 9-19
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
Chapter 9
Default Setting
Layer 2 or switching mode (switchport command).
VLANs 1 to 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.
Autonegotiate.
Flow control is set to receive: off. It is always off for sent packets.
Disabled on all Ethernet ports. See
EtherChannels and Layer 2 Trunk Failover."
Configuring Interface Characteristics
Chapter 11,
Chapter 23, "Configuring
Chapter 33, "Configuring
OL-8915-03
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