R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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Follow these steps to configure jumbo frame support on an Ethernet interface:
To do… Use the command…
Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Configure jumbo frame support jumboframe enable [ value ]
By default, the firewall allows
jumbo frames within the specified
length to pass through all Layer 2
Ethernet interfaces.
Configuring the MDI mode for an Ethernet interface
NOTE:
Fiber ports do not support this function.
You can use both crossover and straight-through Ethernet cables to connect copper Ethernet interfaces.
To accommodate these two types of cables, an Ethernet interface can operate in one of the following
three Medium Dependent Interface (MDI) modes:
• Across mode
• Normal mode
• Auto mode
An Ethernet interface is composed of eight pins. By default, each pin has its particular role. For example,
pin 1 and pin 2 are used for transmitting signals; pin 3 and pin 6 are used for receiving signals. You can
change the pin roles through setting the MDI mode. For an Ethernet interface in normal mode, the pin
roles are not changed. For an Ethernet interface in across mode, pin 1 and pin 2 are used for receiving
signals; pin 3 and pin 6 are used for transmitting signals. To enable normal communication, you should
connect the local transmit pins to the remote receive pins. Therefore, you should configure the MDI mode
depending on the cable types.
• Normally, the auto mode is recommended. The other two modes are useful only when the firewall
cannot determine the cable type.
• When straight-through cables are used, the local MDI mode must be different from the remote MDI
mode.
• When crossover cables are used, the local MDI mode must be the same as the remote MDI mode,
or the MDI mode of at least one end must be set to auto.
Follow these steps to configure the MDI mode for an Ethernet interface:
To do… Use the command…
Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Configure the MDI mode for the
Ethernet interface
mdi { across | auto | normal }
Optional
By default, an Ethernet interface
operates in auto mode to negotiate
pin roles with its peer.