Default Ethernet Interface Configuration; Sfp Configuration - Cisco 2950G 24 - Catalyst Switch Software Configuration Manual

Configuring Switch Interfaces

Default Ethernet Interface Configuration

Table 9-1
listed in the table, see
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
Media Type

SFP Configuration

The Catalyst 2950 LRE switch has four physical input ports that are logically bundled as two ports. Each
logical port consists of a copper 10/100/1000 port and a fiber-optic small form-factor pluggable (SFP)
module slot. These ports display as a vertical column on the front panel and are labeled Uplink Port 1
and Uplink Port 2 on the Catalyst 2950 LRE switch.
Within each port, you can use only one of the two physical ports, either the SFP module port or the
10/100/1000 port. For example, you can connect to either the SFP module port or the 10/100/1000 port
under Uplink Port 1. The default operation is that if the SFP module is plugged in, the fiber-optic
medium has the priority over copper medium. If the SFP module is not plugged in, then the copper
medium becomes active. If the SFP module is plugged in later (even after the copper medium establishes
the link), then the link of the copper medium will be disconnected and the fiber-optic medium will
Catalyst 2950 Desktop Switch Software Configuration Guide
9-10
shows the Ethernet interface default configuration. For more details on the VLAN parameters
Chapter 14, "Configuring VLANs."
Chapter 18, "Configuring Port-Based Traffic Control."

Default Ethernet Interface Configuration

For details on controlling traffic to the port,
Default Setting
Layer 2.
VLANs 1 to 1005 with the SI installed or 1 to 4094 with the EI
installed.
VLAN 1.
Switchport mode dynamic desirable (supports DTP).
All ports are enabled.
None defined.
Autonegotiate.
Autonegotiate.
Flow control is set to off for receive and desired for send for
Gigabit Ethernet ports.
Disabled on all Ethernet ports. See
EtherChannels."
Disabled. See the "Default Storm Control Configuration" section
on page 18-2.
Disabled. See the "Configuring Protected Ports" section on
page 18-3.
Disabled. See the "Default Port Security Configuration" section
on page 18-7.
Disabled.
Media type is set to prefer-sfp by default.
Chapter 9 Configuring the Switch Interfaces
Chapter 27, "Configuring
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