Setting The Mdix Mode Of An Ethernet Interface; Configuring A Layer 3 Ethernet Interface Or Subinterface; Setting The Mtu For An Ethernet Interface Or Subinterface - HP MSR Router Series Configuration Manual

Setting the MDIX mode of an Ethernet interface

NOTE:
Fiber ports do not support the MDIX mode setting.
A physical Ethernet interface comprises eight pins, each of which plays a dedicated role. For example,
pins 1 and 2 transmit signals, and pins 3 and 6 receive signals. You can use both crossover and
straight-through Ethernet cables to connect copper Ethernet interfaces. To accommodate these types of
cables, a copper Ethernet interface can operate in one of the following Medium Dependent
Interface-Crossover (MDIX) modes:
• MDIX mode—Pins 1 and 2 are receive pins and pins 3 and 6 are transmit pins.
MDI mode—Pins 1 and 2 are transmit pins and pins 3 and 6 are receive pins.
•
• AutoMDIX mode—The interface negotiates pin roles with its peer.
To enable the interface to communicate with its peer, set the MDIX mode of the interface mode by using
the following guidelines:
• Generally, set the MDIX mode of the interface to AutoMDIX. Set the MDIX mode of the interface to
MDI or MDIX only when the device cannot determine the cable type.
When a straight-through cable is used, set the interface to operate in the MDIX mode different than
•
its peer.
When a crossover cable is used, set the interface to operate in the same MDIX mode as its peer, or
•
set either end to operate in AutoMDIX mode.
To set the MDIX mode of an Ethernet interface:
Step
1. Enter system view.
2. Enter Ethernet interface view.
3. Set the MDIX mode of the
Ethernet interface.
Configuring a Layer 3 Ethernet interface or
subinterface

Setting the MTU for an Ethernet interface or subinterface

The value of maximum transmission unit (MTU) affects the fragmentation and reassembly of IP packets.
Generally, you do not need to modify the MTU of an interface.
To set the MTU for an Ethernet interface or subinterface:
Command
system-view
interface interface-type
interface-number
mdix-mode { automdix | mdi |
mdix }
11
Remarks
N/A
N/A
By default, a copper Ethernet
interface operates in auto mode to
negotiate pin roles with its peer.