Reference Guide

592 | Interfaces
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mtu
c e s
Z
Set the maximum Link MTU (frame size) for an Ethernet interface.
Syntax
mtu value
To return to the default MTU value, enter
no mtu.
Parameters
Defaults
1554
Command Modes
INTERFACE
Command
History
Usage
Information
If the packet includes a Layer 2 header, the difference between the link MTU and IP MTU (ip
mtu
command) must be enough bytes to include the Layer 2 header:
• On C-Series, the IP MTU will get adjusted automatically when the Layer 2 MTU
is configured with the
mtu command.
• On the E-Series, you must compensate for a Layer 2 header when configuring IP
MTU and link MTU on an Ethernet interface. Use the
ip mtu command.
When you enter the
no mtu command, FTOS reduces the IP MTU value to 1536 bytes. On the
E-Series, to return the IP MTU value to the default, enter
no ip mtu.
l Change the view to next interface on the line card, or if in the line card mode, the
next line card in the chassis.
a Change the view to the previous interface on the line card, or if the line card mode,
the previous line card in the chassis.
T Increase the screen refresh rate.
t Decrease the screen refresh rate.
q Return to the CLI prompt.
Table 22-2. monitor Command Menu Options
Key Description
value
Enter a maximum frame size in bytes.
C-Series, E-Series, and S-Series range: 594 to 9252
S4810 and Z9000 range: 594 to 12000
Default: 1554
Version 8.3.11.1 Introduced on Z9000
Version 8.3.7.0 Introduced on S4810
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.5.1.0 Introduced on C-Series
pre-Version 6.2.1.0 Introduced for E-Series