December 2001
Intermediate to advanced
608 pages
25h 14m
English
Content preview from CISCO IOS in a Nutshell
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Name
ip mtu — interface
Synopsis
ip mtubytesno ip mtubytes
Configures
Maximum Transmission Unit (MTU) for the interface
Default
Depends on the interface’s media type
Description
This command sets the MTU for the interface to
bytes. The MTU is the largest packet size
that can be sent over the interface. The default MTU depends on the
media type; Table 15-10 shows default MTU values for
some common media. This command allows you to modify the MTU for any
interface. Larger MTU values are more efficient with highly reliable
networks; lower MTU values can help if an interface is unreliable, or
in situations where protocols do not support fragmentation.
Table 16-2. Default MTU values
|
Interface type |
Default MTU |
|---|---|
|
Ethernet/Serial |
1500 |
|
HSSI/ATM/FDDI |
4470 |
Example
interface ethernet 0 ip mtu 1250
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