Cisco IOS Router Manuel d'utilisateur télécharger pdf (Page 5)

The Cisco IOS v1.22 – Aaron Balchunas

* * *

Aaron Balchunas (aaron@routeralley.com),

This material may be copied and used freely, but may not be altered or sold without the expressed written

consent of the owner of the above copyright. Updated material may be found at http://www.routeralley.com.

IOS Modes on Cisco Devices (continued)

As its name implies, Global Configuration mode allows parameters that

globally affect the device to be changed. Additionally, Global Configuration

mode is sectioned into several sub-modes dedicated for specific functions.

Among the most common sub-modes are the following:

• Interface Configuration mode -

Router(config-if)#

• Line Configuration mode -

Router(config-line)#

• Router Configuration mode -

Router(config-router)#

Recall the difference between interfaces and lines. Interfaces connect

routers and switches to each other. In other words, traffic is actually routed

or switched across interfaces. Examples of interfaces include Serial, ATM,

Ethernet, Fast Ethernet, and Token Ring.

To configure an interface, one must specify both the type of interface, and

the interface number (which always begins at “0”). Thus, to configure the

first Ethernet interface on a router:

Router(config)# interface ethernet 0

Router(config-if)#

Lines identify ports that allow us to connect into, and then configure, Cisco

devices. Examples would include console ports, auxiliary ports, and VTY

(or telnet) ports.

Just like interfaces, to configure a line, one must specify both the type of

line, and the line number (again, always begins at “0”). Thus, to configure

the first console line on a router:

Router(config)# line console 0

Router(config-line)#

Multiple telnet lines can be configured simultaneously. To configure the first

five telnet (or VTY) lines on a router:

Router(config)# line vty 0 4

Router(config-line)#

Remember that the numbering for both interfaces and lines begins with “0.”

Router Configuration mode is used to configure dynamic routing

protocols, such as RIP. This mode is covered in great detail in other guides.

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Cisco IOS Router Manuel d'utilisateur Page 5