Default Ethernet Interface Configuration - Cisco Catalyst 3120 Software Manual

Configuring Ethernet Interfaces

Default Ethernet Interface Configuration

Table 10-2
to 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. 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 10-2
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
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
10-16
shows the Ethernet interface default configuration, including some features that apply only
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).
VLAN 1 (Layer 2 interfaces only).
Switchport mode dynamic auto (supports DTP) (Layer 2 interfaces
only).
All ports are enabled.
None defined.
1000 Mb/s for the internal ports (nonconfigurable)
Autonegotiate for the external 10/100/1000-Mb/s and SFP module
ports. (Not supported on the 10-Gigabit interfaces.)
Full duplex for the internal ports (nonconfigurable)
Autonegotiate for the external 10/100/1000-Mb/s and SFP module
ports. (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
EtherChannels and Link-State Tracking."
Disabled (not blocked) (Layer 2 interfaces only). See the
"Configuring Port Blocking" section on page
Disabled. See the
on page
Disabled (Layer 2 interfaces only). See the
Ports" section on page
Disabled (Layer 2 interfaces only). See the
Configuration" section on page
Chapter 10
"Default Storm Control Configuration" section
25-3.
25-5.
25-10.
Configuring Interface Characteristics
Chapter 12,
Chapter 25, "Configuring
Chapter 37, "Configuring
25-6.
"Configuring Protected
"Default Port Security
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