PythonQ 248-8XX Guia de Instalação descarregar pdf (Página 162)

162 Chapter 12. Network Scripts

• yes — This interface will allow pppd to initiate a connection when someone attempts to use it.

• no — A connection must be manually established for this interface.

• IDLETIMEOUT= value , where value is the number of seconds of idle activity before the

interface will disconnect itself.

• INITSTRING=

string , where string is the initilization string passed to the modem de-

vice. This option is primarily used with SLIP interfaces.

• LINESPEED=

value , where value is the baud rate of the device. Possible standard values

here include 57600, 38400, 19200, and 9600.

• MODEMPORT=

device , where device is the name of the serial device that is used to estab-

lish the connection for the interface.

• MTU=

value , where value is the Maximum Transfer Unit (MTU) setting for the interface.

The MTU refers to the largest number of bytes of data a frame can carry, not counting its header

information. In some dialup situations, setting this to a value of 576 will result in fewer dropped

packets and slightly improve the throughput for a connection.

• NAME=

name , where name is the reference to the title given to a collection of dialup connec-

tion conﬁgurations.

• PAPNAME=

name , where name is the username given during the Password Authentication

Protocol (PAP) exchange that occurs to allow you to connect to a remote system.

• PEERDNS=

answer , where answer is one of the following:

• yes — Modify thedd system’s /etc/resolv.conf ﬁle entries to use the DNS servers provided

by the remote system when a connection is established.

• no — The /etc/resolv.conf ﬁle will not be modiﬁed.

• PERSIST=

answer , where answer is one of the following:

• yes — This interface should be kept active at all times, even if deactivated after a modem hang

up.

• no — This interface should not be kept active at all times.

• REMIP=

address , where address is the remote system’s IP address. This is usually left

unspeciﬁed.

• WVDIALSECT=

name , where name associates this interface with a dialer conﬁguration in

/etc/wvdial.conf, which contains the phone number to be dialed and other important informa-

tion for the interface.

12.2.3. Other Interfaces

Other common interface conﬁguration ﬁles that use these options include ifcfg-lo, which controls

the IP protocol’s local loopback device, ifcfg-irlan0, which arranges settings for the ﬁrst infrared

device, ifcfg-plip0, which controls the ﬁrst PLIP device, and ifcfg-tr0, used with the ﬁrst

Token Ring device.

A local loopback interface is often used in testing, as well as a variety of applications that require an

IP address pointing back to the same system. Any data sent to the loopback device is immediately

returned to the host’s network layer.

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