Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 325)

Interface Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 12.5
mru
Use this command to set the Maximum Receive Unit (MRU) size for switch ports, where
MRU is the maximum frame size (excluding headers) that switch ports can receive. For
more information, see
“Support for Jumbo Frames” on page 14.16 .
Use the no variant of this command to remove a previously specified Maximum Receive
Unit (MRU) size for switch ports, and restore the default MRU size (1500 bytes) for switch
ports.
Syntax mru <mru-size>
no mru
Default The default MRU size is 1500 bytes for switch ports.
Mode Interface Configuration for switch ports.
Usage Note that show interface output will only show MRU size for switch ports.
Examples To configure an MRU of 16357 bytes on port1.0.2, use the commands:
To configure an MRU of 1500 bytes on port1.0.2 to port1.0.4 use the commands:
To restore the MRU size of 1500 bytes on port1.0.2, use the commands:
Related Commands show interface
Note The figure of 1500 bytes specifies the payload only. For an IEEE 802.1q frame,
provision is made (internally) for the following additional components:
■ Source and Destination addresses
■ EtherType field
■
Priority and VLAN tag fields
■
FCS
These additional components increase the frame size internally to 1522 bytes.
Parameter Description
<mru-size> <68-16357>
Specifies the Maximum Receive Unit (MRU) size in bytes, where:
■
1500 bytes is the default Ethernet MRU size for an interface.
awplus# configure terminal
awplus(config)# interface port1.0.2
awplus(config-if)# mru 16357
awplus# configure terminal
awplus(config)# interface port1.0.2-port1.0.4
awplus(config-if)# mru 1500
awplus# configure terminal
awplus(config)# interface port1.0.2
awplus(config-if)# no mru