10-10
Catalyst 2960 Switch Software Configuration Guide
OL-8603-04
Chapter 10 Configuring Interface Characteristics
Configuring Ethernet Interfaces
Setting the Type of a Dual-Purpose Uplink Port
Some Catalyst 2960 switches support dual-purpose uplink ports. For more information, see the
“Dual-Purpose Uplink Ports” section on page 10-4.
Beginning in privileged EXEC mode, follow these steps to select which dual-purpose uplink to activate so
that you can set the speed and duplex. This procedure is optional.
Native VLAN (for IEEE 802.1Q
trunks)
VLAN 1.
VLAN trunking Switchport mode dynamic auto (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 receive: off. It is always off for sent packets.
EtherChannel (PAgP) Disabled on all Ethernet ports. See Chapter 31, “Configuring
EtherChannels and Link-State Tracking.”
Port blocking (unknown multicast
and unknown unicast traffic)
Disabled (not blocked). See the “Configuring Port Blocking”
section on page 19-7.
Broadcast, multicast, and unicast
storm control
Disabled. See the “Default Storm Control Configuration” section
on page 19-3.
Protected port Disabled. See the “Configuring Protected Ports” section on
page 19-5.
Port security Disabled. See the “Default Port Security Configuration” section
on page 19-10.
Port Fast Disabled. See the “Default Optional Spanning-Tree
Configuration” section on page 17-9.
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.
Keepalive messages Disabled on SFP module ports; enabled on all other ports.
Table 10-1 Default Layer 2 Ethernet Interface Configuration (continued)
Feature Default Setting
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the dual-purpose uplink port to be configured, and enter
interface configuration mode.
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