Cisco 2950 - Catalyst Switch User Manual

11-9
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Chapter 11 Configuring Interface Characteristics
Configuring Ethernet Interfaces
These sections describe the default interface configuration and the optional features that you can
configure on most physical interfaces:
• Default Ethernet Interface Configuration, page 11-9
• Configuring Interface Speed and Duplex Mode, page 11-10
• Configuring Media Types for Gigabit Ethernet Interfaces on LRE Switches, page 11-13
• Configuring IEEE 802.3z Flow Control on Gigabit Ethernet Ports, page 11-13
• Adding a Description for an Interface, page 11-14
Default Ethernet Interface Configuration
Table 11-1 shows the Ethernet interface default configuration. For more details on the VLAN parameters
listed in the table, see Chapter 17, “Configuring VLANs.” For details on controlling traffic to the port,
see Chapter 22, “Configuring Port-Based Traffic Control.”
Table 11-1 Default Ethernet Interface Configuration
Feature Default Setting
Operating mode Layer 2.
Allowed VLAN range VLANs 1 to 1005 with the SI installed or 1 to 4094 with the
EI installed.
Default VLAN (for access ports) VLAN 1.
Native VLAN (for 802.1Q trunks) VLAN 1.
VLAN trunking Switchport mode dynamic desirable (supports DTP).
Port enable state All ports are enabled.
Port description None defined.
Speed Autonegotiate.
Duplex mode Autonegotiate.
Flow control Flow control is set to off for receive and desired for send for
Gigabit Ethernet ports.
EtherChannel (PAgP) and Link
Aggregation Control Protocol (LACP)
Disabled on all Ethernet ports. See Chapter 31, “Configuring
EtherChannels.”
Port blocking—unknown multicast and
unknown unicast traffic (Catalyst 2950
LRE switches only)
Disabled (not blocked). See the “Configuring Port Blocking”
section on page 22-5.
Broadcast, multicast, and unicast storm
control
Disabled. See the “Default Storm Control Configuration”
section on page 22-2.
Protected port Disabled. See the “Configuring Protected Ports” section on
page 22-4.
Port security Disabled. See the “Default Port Security Configuration”
section on page 22-9.
Port Fast Disabled.
Media Type (Catalyst 2950 LRE
switches only)
SFP module preferred.

Cisco 2950 - Catalyst Switch Specifications

General

Brand	Cisco
Model	2950 - Catalyst Switch
Category	Switch
Language	English