Mtu - Allied Telesis AT-IX5-28GPX Manual

I C
NTERFACE OMMANDS

MTU

mtu
Overview Use this command to set the Maximum Transmission Unit (MTU) size for VLANs,
where MTU is the maximum packet size that VLANs can transmit. The MTU size
setting is applied to both IPv4 and IPv6 packet transmission.
Use the no variant of this command to remove a previously specified Maximum
Transmission Unit (MTU) size for VLANs, and restore the default MTU size (1500
bytes) for VLANs.
Syntax
mtu <mtu-size>
no mtu
Default The default MTU size is 1500 bytes for VLAN interfaces.
Mode Interface Configuration for VLAN interfaces.
Usage If a device receives an IPv4 packet for Layer 3 switching to another VLAN with an
MTU size smaller than the packet size, and if the packet has the ' don't fragment'
bit set, then the device will send an ICMP ' destination unreachable' (3) packet
type and a ' fragmentation needed and DF set' (4) code back to the source. For
IPv6 packets bigger than the MTU size of the transmitting VLAN interface, an ICMP
' packet too big' (ICMP type 2 code 0) message is sent to the source.
Note that
Examples To configure an MTU size of 1500 bytes on interface vlan2, use the commands:
awplus#
awplus(config)#
awplus(config-if)#
To configure an MTU size of 1500 bytes on interfaces vlan2 to vlan4, use the
commands:
awplus#
awplus(config)#
awplus(config-if)#
To restore the MTU size to the default MTU size of 1500 bytes on vlan2, use the
commands
awplus#
awplus(config)#
awplus(config-if)#
332 Command Reference for AT-IX5-28GPX High Availability, High Power Video Surveillance PoE Switch
Parameter Description
<68-1582>
<mtu-size>
Specifies the Maximum Transmission Unit (MTU) size in bytes, where
1500 bytes is the default Ethernet MTU size for an interface.
show interface
configure terminal
interface vlan2
configure terminal
interface vlan2-vlan4
configure terminal
interface vlan2
AlliedWare Plus™ Operating System - Version 5.4.5-0.x
output will only show MTU size for VLAN interfaces.
mtu 1500
mtu 1500
no mtu
C613-50057-01 REV A