ADTRAN AOS Version R10.1.0 Command Reference Manual page 1356

Command Reference Guide
system mtu <size>
Use the system mtu command to set the maximum transmission unit (MTU) size for all ports on the AOS
device and allow Ethernet frames larger than 1518 bytes (known as jumbo frames) to pass. Use the no
form of this command to return to the default.
Syntax Description
<size>
The MTU size specified does not include an 802.1Q virtual local area network (VLAN) tag.
For example, if the MTU size is set to allow 1518 bytes, an 802.1Q tagged packet of 1522
bytes would still be accepted.
Default Values
By default, the MTU size is 1518.
Changing the default value (1518) in a switch already installed in a network could cause
traffic disruption.
Command History
Release 17.6
Usage Examples
The following example sets the maximum transmission unit size for all ports on the device to 9216 bytes:
(config)#system mtu 9216
60000CRG0-35E
Indicates the transmission size in bytes. The valid range is 1518 to the
maximum byte size allowed for the unit being configured.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
Global Configuration Mode Command Set
1356