3com 3031 Instruccion De Instalación
Asynchronous Serial Interface
135
Perform the following configuration in asynchronous serial interface view.
The link layer protocol defaults to PPP.
Setting baud rate
Perform the following configuration in asynchronous serial interface view.
The baud rate of asynchronous serial interface defaults to 9600 bps.
When an asynchronous serial interface is working for setting up a dial-up
connection, its baud rate is only the communication rate between it and the
connected modem. As the rate between two modems at the two ends of the link
must be the one that they have negotiated depending on the line quality, the
asynchronous serial interfaces on the routers at the two ends are allowed of
difference in baud rate setting.
connection, its baud rate is only the communication rate between it and the
connected modem. As the rate between two modems at the two ends of the link
must be the one that they have negotiated depending on the line quality, the
asynchronous serial interfaces on the routers at the two ends are allowed of
difference in baud rate setting.
When the asynchronous serial interface is working as a leased line, however, its
baud rate must be the same one set on the remote device.
baud rate must be the same one set on the remote device.
After the synchronous/asynchronous serial interface is set to work in asynchronous
mode, the router will automatically change the baud rate to 9600 bps.
mode, the router will automatically change the baud rate to 9600 bps.
Setting link setup method
There are two link setup approaches available for asynchronous serial interfaces.
They are:
They are:
■
Protocol mode, with which the local end directly adopts the configured link
layer protocol parameters to set up a link with the remote end after setting up
a physical link. This approach is normally adopted in the event that two
asynchronous serial interfaces are directly connected.
layer protocol parameters to set up a link with the remote end after setting up
a physical link. This approach is normally adopted in the event that two
asynchronous serial interfaces are directly connected.
■
Flow mode, which is also known as interactive mode. With this approach, the
two ends set up a link by interacting with each other upon the setup a physical
link. Specifically, the calling party sends the configuration commands to the
called party (it is equal to the operation of manually inputting configuration
commands at the remote end), sets the link layer protocol operating
parameters of the called party, and then sets up the link. This approach is
normally adopted in the event of man-machine interaction.
two ends set up a link by interacting with each other upon the setup a physical
link. Specifically, the calling party sends the configuration commands to the
called party (it is equal to the operation of manually inputting configuration
commands at the remote end), sets the link layer protocol operating
parameters of the called party, and then sets up the link. This approach is
normally adopted in the event of man-machine interaction.
Perform the following configuration in asynchronous serial interface view.
Table 144 Setting the link layer protocol of an asynchronous serial interface
Operation
Command
Set the link layer protocol of an asynchronous serial
interface
interface
link-protocol { slip | ppp }
Table 145 Setting baud rate of an asynchronous serial interface
Operation
Command
Set baud rate of an asynchronous serial interface
baudrate baudrate
Table 146 Setting the link setup approach applied to an asynchronous serial interface
Operation
Command