Cisco 7206 - VXR Router User Manual

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2-32
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
OL-23435-03
Chapter 2 Configuring Basic Interface Parameters
Configuring the Basic Interface Parameters
Note You can change the system jumbo MTU size, but if you change that value, you should also update the
Layer 2 interfaces that use that value so that they use the new system jumbo MTU value. If you do not
update the MTU value for Layer 2 interfaces, those interfaces will use the system default MTU (1500
bytes).
By default, Cisco NX-OS configures Layer 3 parameters. If you want to configure Layer 2 parameters,
you need to switch the port mode to Layer 2.
You can change the port mode by using the switchport command.
After changing the port mode to Layer 2, you can return to configuring Layer 3 interfaces by changing
the port mode again, by using the no switchport command.
This section includes the following topics:
• Configuring the Interface MTU Size, page 2-32
• Configuring the System Jumbo MTU Size, page 2-33
Configuring the Interface MTU Size
For Layer 3 interfaces, you can configure an MTU size that is between 576 and 9216 bytes.
For Layer 2 interfaces, you can configure all Layer 2 interfaces to use either the default MTU size (1500
bytes) or the system jumbo MTU size (default size of 9216 bytes).
If you need to use a different system jumbo MTU size for Layer 2 interfaces, see the “Configuring the
System Jumbo MTU Size” section on page 2-33.
SUMMARY STEPS
1. configure terminal
2. interface ethernet slot/port
3. {switchport | no switchport}
4. mtu size
5. show interface ethernet slot/port
6. exit
7. copy running-config startup-config
DETAILED STEPS
Command Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters configuration mode.
Step 2
interface ethernet slot/port
Example:
switch(config)# interface ethernet 3/1
switch(config-if)#
Specifies an Ethernet interface to
configure, and enters interface
configuration mode.

Cisco 7206 - VXR Router Specifications

General

Brand	Cisco
Model	7206 - VXR Router
Category	Network Router
Language	English