Setting The Type Of A Dual-Purpose Uplink Port - Cisco Catalyst 2975 Software Configuration Manual

Chapter 12 Configuring Interface Characteristics
Table 12-2
Feature
Port blocking (unknown multicast
and unknown unicast traffic)
Broadcast, multicast, and unicast
storm control
Protected port
Port security
Port Fast
Auto-MDIX
Power over Ethernet (PoE)
Keepalive messages

Setting the Type of a Dual-Purpose Uplink Port

Some switches support dual-purpose uplink ports. By default, the switch dynamically selects the
interface type that first links up. However, you can use the media-type interface configuration command
to manually select the RJ-45 connector or the SFP module connector. For more information, see the
"Dual-Purpose Uplink Ports" section on page
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.
Command
Step 1 configure terminal
Step 2 interface interface-id
OL-19720-02
Default Layer 2 Ethernet Interface Configuration (continued)
Default Setting
Disabled (not blocked). See the
section on page
Disabled. See the
on page
Disabled. See the
page 23-6.
Disabled. See the
on page
Disabled. See the
Configuration" section on page
Enabled.
Note
Enabled (auto).
Disabled on SFP module ports; enabled on all other ports.
Purpose
Enter global configuration mode.
Specify the dual-purpose uplink port to be configured, and enter
interface configuration mode.
"Configuring Port Blocking"
23-8.
"Default Storm Control Configuration" section
23-3.
"Configuring Protected Ports" section on
"Default Port Security Configuration" section
23-11.
"Default Optional Spanning-Tree
18-12.
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.
12-4.
Catalyst 2975 Switch Software Configuration Guide
Configuring Ethernet Interfaces
12-17