Cisco 3750G - Catalyst Integrated Wireless LAN Controller, Руководство по настройке

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11-16
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 11 Configuring Interface Characteristics
Configuring Ethernet Interfaces
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 11-2 Default Layer 2 Ethernet Interface Configuration
Feature Default Setting
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. (Not supported on the 10-Gigabit interfaces.)
Duplex mode Autonegotiate. (Not supported on the 10-Gigabit interfaces.)
Flow control Flow control is set to receive : off . It is always off for sent packets.
EtherChannel (PAgP) Disabled on all Ethernet ports. See Chapter 34, “Configuring
EtherChannels and Link-State Tracking.”
Port blocking (unknown multicast
and unknown unicast traffic) Disabled (not blocked) (Layer 2 interfaces only). See the
“Configuring Port Blocking” section on page 25-7 .
Broadcast, multicast, and unicast
storm control Disabled. See the “Default Storm Control Configuration” section
on page 25-3 .
Protected port Disabled (Layer 2 interfaces only). See the “Configuring Protected
Ports” section on page 25-5 .
Port security Disabled (Layer 2 interfaces only). See the “Default Port Security
Configuration” section on page 25-10 .
Port Fast Disabled. See the “Default Optional Spanning-Tree
Configuration” section on page 20-12 .
Auto-MDIX Enabled.
Note The switch might not support a pre-standard powered
device—such as Cisco IP phones and access points that do
not fully support IEEE 802.3af—if that powered device is
connected to the switch through a crossover cable. This is
regardless of whether auto-MIDX is enabled on the switch
port.
Power over Ethernet (PoE) Enabled (auto).
Keepalive messages Disabled on SFP module ports; enabled on all other ports.