13-17
Cisco IE 3000 Switch Software Configuration Guide
OL-13018-03
Chapter 13 Configuring Interface Characteristics
Configuring the System MTU
Adding a Description for an Interface
You can add a description about an interface to help you remember its function. The description appears
in the output of these privileged EXEC commands:
show configuration
,
show running-config
,
and
show interfaces
.
Beginning in privileged EXEC mode, follow these steps to add a description for an interface:
Use the
no description
interface configuration command to delete the description.
This example shows how to add a description on a port and how to verify the description:
Switch#
config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#
interface gigabitethernet1/2
Switch(config-if)#
description Connects to Marketing
Switch(config-if)#
end
Switch#
show interfaces gigabitethernet1/2 description
Interface Status Protocol Description
Gi1/2 admin down down Connects to Marketing
Configuring the System MTU
The default maximum transmission unit (MTU) size for frames received and transmitted on all interfaces
on the switch is 1500 bytes. You can increase the MTU size for all interfaces operating at 10 or 100 Mb/s
by using the
system mtu
global configuration command. You can increase the MTU size to support
jumbo frames on all Gigabit Ethernet interfaces by using the
system mtu jumbo
global configuration
command.
Gigabit Ethernet ports are not affected by the
system mtu
command; 10/100 ports are not affected by
the
system mtu jumbo
command. If you do not configure the
system mtu jumbo
command, the setting
of the
system mtu
command applies to all Gigabit Ethernet interfaces.
You cannot set the MTU size for an individual interface; you set it for all 10/100 or all Gigabit Ethernet
interfaces on the switch. When you change the system or jumbo MTU size, you must reset the switch
before the new configuration takes effect.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface
interface-id
Specify the interface for which you are adding a description, and enter
interface configuration mode.
Step 3
description
string
Add a description (up to 240 characters) for an interface.
Step 4
end
Return to privileged EXEC mode.
Step 5
show interfaces
interface-id
description
or
show running-config
Verify your entry.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Содержание IE 3000
Страница 36: ...xxxiv Cisco IE 3000 Switch Software Configuration Guide OL 13018 03 Preface ...
Страница 784: ...39 20 Cisco IE 3000 Switch Software Configuration Guide OL 13018 03 Chapter 39 Troubleshooting Troubleshooting Tables ...
Страница 874: ...Index IN 42 Cisco IE 3000 Switch Software Configuration Guide OL 13018 03 ...