jumboframe enable

Function

The jumboframe enable command sets the maximum frame length allowed by an interface.

The undo jumboframe enable command restores the default maximum frame length allowed by an interface.

By default, the maximum frame length allowed by the S5735-S, S5735S-S, S5735-S-I, S5735-L, S5735S-L, or S5735S-L-M is 10240 bytes, and the maximum frame length allowed by other switches is 9216 bytes.

The following switch models do not support this command:

S5735-S, S5735S-S, S5735-S-I, S5735-L, S5735S-L, and S5735S-L-M

Format

jumboframe enable [ value ]

undo jumboframe enable

Parameters

Parameter	Description	Value
value	Specifies the maximum frame length allowed by an Ethernet interface.	On the S2720-EI, S5720I-SI, S5720-LI, S5720S-LI, S5720S-SI, S5720-SI, S5730S-EI, S5730-SI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI, the value is an integer that ranges from 1536 to 10240. On the S5720-EI, S5720-HI, S5732-H24S6Q, S5732-H48S6Q, , S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S, the value is an integer that ranges from 1536 to 12288. On the S5732-H24UM2CC, S5732-H48UM2CC, S5730-HI, S5731-H, S5731S-H, S5731-S, S5731S-H, and S5731S-S, the value is an integer that ranges from 1536 to 9600. NOTE: On the S2720-EI, S5720I-SI, S5720-LI, S5720S-LI, S5720S-SI, S5720-SI, S5730S-EI, S5730-SI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI, value cannot be set to an odd number. For GE electrical interfaces on the S5730-SI, S5730S-EI and S6720-SI, value can only be set to 10232. If value is set to an odd number in a version earlier than V200R008, the value of value increases by one automatically after the system software is upgraded to V200R008 or later versions. For example, value is set to 8879 in V200R007. After the system software is upgraded to V200R008, the value of value is 8880. For the S6720-50L-HI-48S, the value of the value parameter can only be configured as a multiple of 8 on the first 12 interfaces.

Views

Ethernet interface view, GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, port group view, Eth-Trunk interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When transmitting a large amount of data (such as files and videos), an Ethernet interface may receive jumbo frames. If the jumbo frame length exceeds the default data frame length that can be processed, the device directly discards the jumbo frames. You can set the jumbo frame length allowed on an interface.

After you configure the device to allow jumbo frames, packet forwarding becomes more flexible. If multiple common Ethernet frames are used to transmit a data packet, many redundant contents such as interframe gaps (IFGs) and preambles are also transmitted. If jumbo frames are used to transmit the data packet, fewer frames, as well as fewer IFGs and preambles, are transmitted, improving bandwidth efficiency.

Precautions

If you run the jumboframe enable command multiple times in the same interface view to set the maximum frame length allowed by the interface, only the latest configuration takes effect.

If you run the jumboframe enable command on an interface without specifying the value parameter, the interface allows the default jumbo frame length. By default, the jumbo frame length allowed by Ethernet interfaces of other models is 9216 bytes.

IF the length of an outgoing packet exceeds the maximum frame length allowed on an interface, the interface can directly forward the packet.

Example

# Set the maximum frame length allowed by GE0/0/1 to 5000 bytes.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] jumboframe enable 5000