Configuring The Suppression Time Of Link-Layer-State Changes On An Ethernet Interface; Maintaining And Displaying An Ethernet Interface - 3Com MSR 50 Series Configuration Manual

Configuring the
Suppression Time of
Link-Layer-State
Changes on an Ethernet
Interface
Maintaining and
Displaying an
Ethernet Interface
Follow the following steps to set the MTU for an Ethernet interface:
To do...
Enter system view
Enter Ethernet interface view
Set the MTU
n
Limited to the QoS queue length (for example, the default length 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. In Ethernet interface view, you can use qos fifo queue-length to
change the QoS queue length. For detailed configurations, see
page 1623.
An Ethernet interface working in Layer 3 mode has two link layer states: up and
down. During the suppression time, link-layer-state changes will not be
propagated to the system. Only after the suppression time has elapsed will the
system be notified of the link-layer-state changes by the link layer. This
functionality reduces the extra overhead occurred due to frequent link-layer-state
changes within a short period of time.
Follow the following steps to configure the suppression time of link-layer-state
changes on Ethernet Interface:
To do...
Enter system view
Enter Ethernet interface view
Configure the suppression time of
link-layer-state changes on an Ethernet
Interface
n
You can increase the polling interval to reduce the negative effective caused to
network traffic due to time delay or heavy congestion.
To do...
Display the current state of a
specified interface and related
information
Display a summary of a
specified interface
Reset the statistics of a
specified interface
Display the current ports of a
specified type

Maintaining and Displaying an Ethernet Interface

Use the command...
system-view
interface interface-type
interface-number
mtu size
Use the command...
system-view
interface interface-type
interface-number
timer hold seconds
Use the command...
display interface [ interface-type
[ interface-number ] ]
display brief interface
[ interface-type [ interface-number ] ]
[ | { begin | include | exclude} text ]
reset counters interface
[ interface-type [ interface-number ] ]
display port { hybrid | trunk }
97
Remarks
-
-
Optional
1,500 bytes by default
"QoS Overview" on
Remarks
-
-
Optional
10 seconds by
default
Remarks
Available in any view
Available in any view
Available in user view
Available in any view