Default Layer 2 Ethernet Interface Configuration; Configuring The Port Speed And Duplex Mode - Cisco Catalyst 2950 Software Configuration Manual

Chapter 9 Configuring Interface Characteristics

Default Layer 2 Ethernet Interface Configuration

Table 9-1
parameters listed in the table, see
to the port, see
Table 9-1
Feature
Operating mode
Allowed VLAN range
Default VLAN (for access ports)
Native VLAN (for 802.1Q trunks) VLAN 1.
VLAN trunking
Port enable state
Port description
Speed
Duplex mode
Flow control
EtherChannel (PAgP)
Broadcast, multicast, and unicast
storm control
Protected port
Port security
Port Fast

Configuring the Port Speed and Duplex Mode

These sections describe how to configure the interface speed and duplex mode:
•
•
•
Caution If you reconfigure the port through which you are managing the switch, a Spanning Tree Protocol (STP)
reconfiguration could cause a temporary loss of connectivity.
78-11380-04
shows the Layer 2 Ethernet interface default configuration. For more details on the VLAN
Chapter 17, "Configuring Port-Based Traffic Control."
Default Layer 2 Ethernet Interface Configuration
Configuration Guidelines, page 9-12
Connecting to Devices That Do Not Autonegotiate, page 9-12
Setting Speed and Duplex Parameters, page 9-12
Chapter 13, "Configuring VLANs."
Default Setting
Layer 2.
VLANs 1– 4094 when the enhanced software image is installed
and 1 to 1005 when the standard software image is installed.
VLAN 1.
Switchport mode dynamic desirable (supports DTP).
All ports are enabled.
None defined.
Autonegotiate.
Autonegotiate.
Flow control set to off for receive and desired for send for
10/100/1000 Mbps. For 10/100 Mbps ports, send is always off.
Disabled on all Ethernet ports. See
EtherChannels."
Disabled. See the "Configuring Storm Control" section on
page 17-1.
Disabled. See the "Configuring Protected Ports" section on
page 17-3.
Disabled. See the "Configuring Port Security" section on
page 17-3.
Disabled.
Catalyst 2950 Desktop Switch Software Configuration Guide
Configuring the Port Speed and Duplex Mode
For details on controlling traffic
Chapter 25, "Configuring
9-11