Configuring A Maximum Frame Size; Configuring Ip Mtu; Snmp Implementation; Displaying The Maximum Frame Size - HP Aruba JL253A Management And Configuration Manual

Configuring a maximum frame size

You can globally set a maximum frame size for jumbo frames that will support values from 1518 bytes to 9216
bytes for untagged frames.
Syntax:
jumbo max-frame-size <size>
Sets the maximum frame size for jumbo frames. The range is from 1518 bytes to 9216 bytes. (Default: 9216
bytes)
NOTE:
The jumbo max-frame-size is set on a GLOBAL level.
Default: 9216 bytes

Configuring IP MTU

NOTE:
The following feature is available on the switches covered in this guide. jumbos support is required
for this feature. On switches that do not support this command, the IP MTU value is derived from the
maximum frame size and is not configurable.
You can set the IP MTU globally by entering this command. The value of max-frame-size must be greater than
or equal to 18 bytes more than the value selected for ip-mtu. For example, if ip-mtu is set to 8964, the max-
frame-size is configured as 8982.
Syntax:
jumbo ip-mtu <size>
Globally sets the IP MTU size. Values range between 1500 and 9198 bytes. This value must be 18 bytes less
than the value of max-frame-size.
(Default: 9198 bytes)

SNMP implementation

Jumbo maximum frame size
The maximum frame size for jumbos is supported with the following proprietary MIB object:
hpSwitchMaxFrameSize OBJECT-TYPE
This is the value of the global max-frame-size supported by the switch. The default value is set to 9216 bytes.
Jumbo IP MTU
The IP MTU for jumbos is supported with the following proprietary MIB object:
hpSwitchIpMTU OBJECT-TYPE
This is the value of the global jumbos IP MTU (or L3 MTU) supported by the switch. The default value is set to
9198 bytes (a value that is 18 bytes less than the largest possible maximum frame size of 9216 bytes). This
object can be used only in switches that support max-frame-size and ip-mtu configuration.

Displaying the maximum frame size

Use the show jumbos command to display the globally configured untagged maximum frame size for the switch,
as shown in the following Example:.
Chapter 6 Port Traffic Controls 177