Configuring Jumbo Frame Support; Configuring Physical State Change Suppression On An Ethernet Interface - H3C S6850 Series Configuration Manual

2. Enter Ethernet interface view.
interface interface-type interface-number
3. Configure the link mode of the Ethernet interface.
port link-mode { bridge | route }
By default, all Ethernet interfaces on the device operate in bridge mode.

Configuring jumbo frame support

About jumbo frame
Jumbo frames are frames larger than 1536 bytes and are typically received by an Ethernet interface
during high-throughput data exchanges, such as file transfers.
The Ethernet interface processes jumbo frames in the following ways:
•
When the Ethernet interface is configured to deny jumbo frames (by using the undo
jumboframe enable command), the Ethernet interface discards jumbo frames.
•
When the Ethernet interface is configured with jumbo frame support, the Ethernet interface
performs the following operations:
Processes jumbo frames within the specified length.
Discards jumbo frames that exceed the specified length.
Procedure
1. Enter system view.
system-view
2. Enter Ethernet interface view.
interface interface-type interface-number
3. Configure jumbo frame support.
jumboframe enable [ size ]
By default, the device allows jumbo frames within 9416 bytes to pass through.
If you set the size argument multiple times, the most recent configuration takes effect.
Configuring physical state change suppression on an
Ethernet interface
About physical state change suppression
The physical link state of an Ethernet interface is either up or down. Each time the physical link of an
interface comes up or goes down, the interface immediately reports the change to the CPU. The
CPU then performs the following operations:
•
Notifies the upper-layer protocol modules (such as routing and forwarding modules) of the
change for guiding packet forwarding.
•
Automatically generates traps and logs to inform users to take the correct actions.
To prevent frequent physical link flapping from affecting system performance, configure physical
state change suppression. You can configure this feature to suppress only link-down events, only
link-up events, or both. If an event of the specified type still exists when the suppression interval
expires, the system reports the event to the CPU.
Restrictions and guidelines
Do not enable this feature on an interface that has RRPP, spanning tree protocols, or Smart Link
enabled.
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