17
Host-initiated network structure
As shown in
, a PPPoE session is established between each host (PPPoE client) and the
carrier device (PPPoE server). The service provider assigns an account to each host for billing and
control. The host must be installed with PPPoE client software.
Figure 3 Host-initiated network structure
Configuring a PPPoE client
Operation mode
A PPPoE session can operate in one of the following modes:
•
Permanent
mode
—A PPPoE session is established immediately when the line is physically up.
This type of session remains until the physical link comes down or until the session is
disconnected.
•
On-demand
mode
—A PPPoE session is established when there is a demand for data
transmission instead of when the line is physically up. It is terminated when idled for a specific
period of time.
•
Diagnostic
mode
—A PPPoE session is established immediately after the device
configurations finish. The device automatically terminates the PPPoE session and then tries to
re-establish a PPPoE session at a pre-configured interval. By establishing and terminating
PPPoE sessions periodically, you can monitor the operating status of the PPPoE link.
The PPPoE session operating mode is determined by your configuration on the dialer interface:
•
Permanent
mode
—Used when you set the link idle time to 0 by using the
dialer timer
idle
command and do not configure the
dialer diagnose
command.
•
On-demand
mode
—Used when you set the link idle time to a non-zero value by using the
dialer timer idle
command and do not configure the
dialer diagnose
command.
•
Diagnostic
mode
—Used when you configure the
dialer diagnose
command.
PPPoE client tasks at a glance
To configure a PPPoE client, perform the following tasks:
1.
Configuring a dialer interface
2.
3.
(Optional.)
