Cisco Systems CISCO7201 manual Configuring the Native Gigabit Ethernet Interfaces, Example, Sfp

Chapter 3 Starting and Configuring the Router

Configuring a Cisco 7201 Router

Step 11 If you choose not to save your configuration, go directly into the router command structure by choosing 0, or choose one from the menu to go back to the start of the setup menu. See the following output for options 0, 1, and 2. Choose option 2 to save your settings to NVRAM. (See the “Checking the Running Configuration Settings” section on page 3-21, and then the “Saving the Running Configuration to NVRAM” section on page 3-21.) If you do not save the configuration settings that you created in the router using configuration mode and the setup facility, your configuration will be lost the next time you reload the router.

[0]Go to the IOS command prompt without saving this config.

[1]Return back to the setup without saving this config.

[2]Save this configuration to nvram and exit.

Enter your selection [2]: 2 media-type 100BaseX Building configuration...

Use the enabled mode 'configure' command to modify this configuration.

Press RETURN to get started!

Configuring the Native Gigabit Ethernet Interfaces

The Cisco 7201 router reports the Gigabit Ethernet SFP ports as GigabitEthernet 0/0, GigabitEthernet 0/1, GigabitEthernet 0/2, and GigabitEthernet 0/3. The Cisco 7201 router reports the RJ-45 ports as GigabitEthernet 0/0 and Gigabit Ethernet 0/1. Before configuring either the GigabitEthernet 0/0 or Gigabit Ethernet 0/1 interfaces, you must first use the media-typeinterface command to select the media type, sfp or rj45.

Changing the Media Type

To be able to use a particular media type, use Cisco IOS to select the media type. This is done by using the media-typeinterface command:

media-type { sfp rj45 }

Example:

interface GigabitEthernet 0/0 media-type rj45

end

Configuring the Interface Transmission and Speed Modes

After changing the media type, configure the speed and duplex transmission modes to appropriately match the new interface characteristics. Changing the speed and duplex of a Cisco 7201 router Gigabit Ethernet interface is done using the speed and duplex interface commands.

Table 3-3	Supported Speed and Duplex Settings
Media Type		Speed	Duplex
SFP		1000, auto	full, half, auto1
RJ-45		10, 100, 1000, auto	full, half, auto

1. GE 0/3 only supports full duplex mode.

	Cisco 7201 Installation and Configuration Guide
OL-11364-04		3-15