Cisco Systems 3560 사용자 설명서

 shows the Ethernet interface default configuration, including some features that apply only 

to Layer 2 interfaces. For more details on the VLAN parameters listed in the table, see 

 For details on controlling traffic to the port, see 

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.

Operating mode

Layer 2 or switching mode (switchport command).

Allowed VLAN range

VLANs 1 to 4094. 

Default VLAN (for access ports)

VLAN 1 (Layer 2 interfaces only).

Native VLAN (for IEEE 802.1Q 
trunks)

VLAN 1 (Layer 2 interfaces only).

VLAN trunking

Switchport mode dynamic auto (supports DTP) (Layer 2 interfaces 
only).

Port enable state

All ports are enabled.

Port description

None defined.

Speed

Autonegotiate. 

Duplex mode

Autonegotiate. 

Flow control

Flow control is set to receive: off. It is always off for sent packets.

EtherChannel (PAgP)

Disabled on all Ethernet ports. See 

Port blocking (unknown multicast 
and unknown unicast traffic)

Disabled (not blocked) (Layer 2 interfaces only). See the 

. 

Broadcast, multicast, and unicast 
storm control

Disabled. See the