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Protocol
In the Protocol drop down list, select the Protocol to be used for
authentication with the PPPoE server. Protocol options are: None, PAP and
CHAP.
In the Protocol drop down list, select the Protocol to be used for
authentication with the PPPoE server. Protocol options are: None, PAP and
CHAP.
Figure 74. PPPoE Protocol Selection
Concentrator
The Concentrator contains the name of a server and relates to the case where
there are multiple PPPoE servers available. If those servers have a valuable name
(called a Concentrator name) you can choose the proper one by type the correct
name into this field.
The Concentrator contains the name of a server and relates to the case where
there are multiple PPPoE servers available. If those servers have a valuable name
(called a Concentrator name) you can choose the proper one by type the correct
name into this field.
Keep DNS and Gateway
In most cases PPPoE authentication supplies the client with some valid DNS
addresses and makes the PPPoE interface the default system gateway. To set a
static DNS address and/or a default gateway, or leave another application to
configure them, (e.g. DHCP client), select the Keep DNS and Gateway check
box.
In most cases PPPoE authentication supplies the client with some valid DNS
addresses and makes the PPPoE interface the default system gateway. To set a
static DNS address and/or a default gateway, or leave another application to
configure them, (e.g. DHCP client), select the Keep DNS and Gateway check
box.
MTU size
The normal Ethernet MTU is 1500 bytes in length, but the PPPoE overhead, plus
two bytes of overhead for the encapsulated PPP frame, mean that the MTU of
the PPP interface is at most 1492 bytes. This causes all kinds of problems if you
are using a Linux machine as a firewall and interfaces behind the firewall have an
MTU greater than 1492. For safety MTU size must be an integer between 536
and 1412.
The normal Ethernet MTU is 1500 bytes in length, but the PPPoE overhead, plus
two bytes of overhead for the encapsulated PPP frame, mean that the MTU of
the PPP interface is at most 1492 bytes. This causes all kinds of problems if you
are using a Linux machine as a firewall and interfaces behind the firewall have an
MTU greater than 1492. For safety MTU size must be an integer between 536
and 1412.
Enable on Demand
Enable on Demand is a feature which enables the functionality of creating a
PPPoE connection only when there is IP traffic on a PPPoE interface. Some ISPs
offer connection agreements where charging depends on time. In these cases
this feature could be valuable. When the Enable on Demand check box is
selected, the following fields appear: Remote Domain, Remote IP and
Demand Time
Enable on Demand is a feature which enables the functionality of creating a
PPPoE connection only when there is IP traffic on a PPPoE interface. Some ISPs
offer connection agreements where charging depends on time. In these cases
this feature could be valuable. When the Enable on Demand check box is
selected, the following fields appear: Remote Domain, Remote IP and
Demand Time