H3C Technologies H3C SecPath F1000-E - Manual (Page 43)

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Step Command Remarks
4. Set the multicast
suppression threshold ratio. multicast-suppression ratio
Optional.
By default, multicast traffic is not
suppressed.
5. Set the unknown unicast
suppression threshold ratio. unicast-suppression ratio
Optional.
By default, unknown unicast
traffic is not suppressed.
Configuring jumbo frame support
An Ethernet interface may receive some frames larger than the standard Ethernet frame size (called
"jumbo frames") during high-throughput data exchanges such as file transfers. Usually, an Ethernet
interface discards jumbo frames. With jumbo frame support enabled, the interface can process frames
larger than the standard Ethernet frame size yet within the specified range.
In global configuration mode (system view) or interface configuration mode (Ethernet interface view), you
can set the length of jumbo frames that are allowed to pass through the Ethernet interface. If you execute
the command in Ethernet interface view, the configuration takes effect only on the interface.
To configure jumbo frame support in system view:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view.
interface interface-type
interface-number
N/A
3. Configure jumbo frame
support.
jumboframe enable [ value ]
Optional.
By default, the device allows jumbo frames
within the specified length to pass through all
Layer 2 Ethernet interfaces.
If you set the value argument multiple times,
the latest configuration takes effect.
Setting the MDI mode of an Ethernet interface
NOTE:
Optical interfaces do not support the MDI mode setting.
You can use both crossover and straight-through Ethernet cables to connect copper Ethernet interfaces.
To accommodate these two types of cables, a copper Ethernet interface can operate in one of the
following Medium Dependent Interface (MDI) modes:
• Across mode
• Normal mode
• Auto mode
A copper Ethernet interface uses an RJ-45 connector, which comprises eight pins, each playing a
dedicated role. For example, pins 1 and 2 transmit signals, and pins 3 and 6 receive signals. The pin
role varies by the following MDI modes:
• In normal mode, pins 1 and 2 are transmit pins, and pins 3 and 6 are receive pins.