Testing The Cable On An Ethernet Interface; Configuring Layer 3 Ethernet Interfaces; Configuration Task List; Setting The Mtu For An Ethernet Interface - 3Com MSR 50 Series Configuration Manual

96 C 3: E
HAPTER THERNET
Testing the Cable on an
Ethernet Interface
Configuring Layer 3
Ethernet Interfaces

Configuration Task List

Setting the MTU for an
Ethernet Interface
I C
NTERFACE ONFIGURATION
Across mode, where the Ethernet interface only accepts crossover cables.
■
Normal mode, where the Ethernet interface only accepts straight-through
■
cables.
Auto mode, where the Ethernet interface accepts both straight-through cables
■
and crossover cables.
Normally, the auto mode is recommended. The other two modes are useful only
when the device cannot determine the cable type.
Follow these steps to configure the cable type for an Ethernet Interface:
To do...
Enter system view
Enter Ethernet interface
view
Configure the cable
type for an Ethernet
interface
n
The optical interface of a Combo port does not support this feature.
Complete the following configurations to test the current working state of the
cable on an Ethernet interface. The system will return the testing result within five
seconds, indicating the receiving direction (RX), transmit direction (TX), any
short-circuit or open circuit, and the length of the faulty cable.
To do...
Enter system view
Enter Ethernet interface view
Test the current working state of
Ethernet interface cables
Ethernet interface configuration in bridge mode involves the following tasks:
"Setting the MTU for an Ethernet Interface" on page 96
■
"Configuring the Suppression Time of Link-Layer-State Changes on an
■
Ethernet Interface" on page 97
The value of Maximum Transmission Unit (MTU for short) affects the
fragmentation and grouping of IP packets.
Use the command...
system-view
interface interface-type
interface-number
mdi { across | auto | normal }
Use the command...
system-view
interface interface-type
interface-number
virtual-cable-test
Remarks
-
-
Optional
Defaults to auto, that is, system
automatically detects the type of
cable in use.
Remarks
-
-
Required