Configuring Layer 2 Interfaces - Cisco WS-C3550-12G Software Configuration Manual
Multilayer switch
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- User manual (436 pages) ,
- Manual (278 pages) ,
- Datasheet (19 pages)
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Configuring Layer 2 Interfaces
This example shows how to define an interface-range macro named enet_list to select Gigabit Ethernet
ports 1 to 4 and to verify the macro configuration:
Switch# configure terminal
Switch(config)# define interface-range enet_list gigabitethernet0/1 - 4
Switch(config)# end
Switch# show running-config | include define
define interface-range enet_list GigabitEthernet0/1 - 4
Switch#
This example shows how to create a multiple-interface macro named macro1:
Switch# configure terminal
Switch(config)# define interface-range macro1 gigabitethernet0/1 - 2, fastethernet0/5 - 7
Switch(config)# end
Switch#
This example shows how to enter interface range configuration mode for the interface-range macro
enet_list:
Switch# configure terminal
Switch(config)# interface range macro enet_list
Switch(config-if-range)#
This example shows how to delete the interface-range macro enet_list and to verify that it has been
deleted.
Switch# configure terminal
Switch(config)# no define interface-range enet_list
Switch# show run | include define
Switch#
Configuring Layer 2 Interfaces
These sections describe the default interface configuration and the optional features that you can
configure on most physical interfaces:
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•
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If the interface is in Layer 3 mode, after entering interface configuration mode, you must enter the
Caution
switchport interface configuration command without any parameters to put the interface into Layer
2 mode. This shuts down the interface and then re-enables it, which might generate messages on the
device to which the interface is connected. Furthermore, when you use this command to put the
interface into Layer 2 mode, you are deleting any Layer 3 characteristics configured on the interface.
Catalyst 3550 Multilayer Switch Software Configuration Guide
8-12
Default Layer 2 Ethernet Interface Configuration, page 8-13
Configuring Interface Speed and Duplex Mode, page 8-14
Configuring IEEE 802.3X Flow Control, page 8-16
Adding a Description for an Interface, page 8-17
Chapter 8
Configuring Interface Characteristics
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