Configuring Jumbo Frame Support; Configuring Physical State Change Suppression On An Ethernet Interface - HPE FlexFabric 5940 Series Configuration Manual

Configuring jumbo frame support

An Ethernet interface might receive frames larger than the standard Ethernet frame size during
high-throughput data exchanges, such as file transfers. These frames are called jumbo frames.
The Ethernet interface processes jumbo frames in the following ways:
•
When the Ethernet interface is configured to deny jumbo frames, 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.
To configure jumbo frame support in interface view:
Step
Enter system view.
1.
Enter Ethernet interface
2.
view.
Configure jumbo frame
3.
support.
Configuring physical state change suppression on an
Ethernet interface
IMPORTANT:
Do not enable this feature on an interface that has RRPP, spanning tree protocols, or Smart Link
enabled.
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.
When you configure this feature, follow these guidelines:
•
To suppress only link-down events, configure the link-delay [ msec ] delay-time command.
•
To suppress only link-up events, configure the link-delay [ msec ] delay-time mode up
command.
•
To suppress both link-down and link-up events, configure the link-delay [ msec ] delay-time
mode updown command.
To configure physical state change suppression on an Ethernet interface:
Command
system-view
interface interface-type
interface-number
jumboframe enable [ size ]
5
Remarks
N/A
N/A
By default, the switch allows jumbo
frames within 10000 bytes to pass
through all Ethernet interfaces.