R3204P16-HP Load Balancing Module Network Management Configuration Guide-6PW101

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To do… Use the command… Remarks
Set the MDI mode of the Ethernet
interface
mdi { across | auto | normal }
Optional
By default, a copper Ethernet
interface operates in auto mode to
negotiate pin roles with its peer.
Configuring a Layer 3 Ethernet interface or subinterface
Complete these tasks to configure Layer 3 Ethernet interfaces or subinterfaces:
Task Remarks
Setting the MTU for an Ethernet interface or
subinterface
Optional
Applicable to Layer 3 Ethernet interfaces and subinterfaces
Configuring link change suppression on an
Ethernet interface
Optional
Applicable to Layer 3 Ethernet interfaces
1. Setting the MTU for an Ethernet interface or subinterface
The value of Maximum Transmission Unit (MTU) affects the fragmentation and re-assembly of IP packets.
Follow these steps to set the MTU for an Ethernet interface or subinterface:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface or
subinterface view
interface interface-type { interface-number |
interface-number.subnumber }
—
Set the MTU mtu size
Optional
1500 bytes by default.
NOTE:
Due to the QoS queue length limit (for example, the default len
g
th of an FIFO queue is 75), too small an
MTU will result in too many fragments, which will be discarded from the QoS queue. In this case, you can
increase MTU or QoS queue length properly.
2. Configuring link change suppression on an Ethernet interface
The link layer state of a Layer 3 Ethernet interface is either up or down. Each time the link layer state of
an interface changes, the link layer reports the change to the upper layers, and the upper layers handle
the change, resulting in increased overhead.
To prevent link layer flapping from affecting system performance, configure link change suppression to
delay the reporting of link layer state changes. The link layer reports the changes only when the delay
expires.
Follow these steps to configure the link change suppression interval on an Ethernet interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—