Alcatel AST570, User Manual

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The 'Active PPTP
Connections' table
'Active PPTP
Connections' table
components
10 Configuration and Use - Relayed PPPoA
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The following figure shows the 'Active PPTP Connections' table:
In the example one active Relayed PPPoA connection is up.
Field Description
Dialstring In your DialUp application you are able to specify which PPPoA
entry (and PPTP profile) is to be used by adding the appropriate
dialstring. This dialstring is indicated here, if applied.
Destination Indicates the PPPoA phonebook entry name in use.
Qos Indicates the Quality of Service (QoS) applicable for the Relayed
PPPoA connection. In most cases the Qos column will indicate
default
. Via the CLI you can configure a specific QoS profile(*).
Encap Indicates the applied encapsulation method for PPP frames in the
VC.
The
AST570 supports both the VCMUX method (default) and
the LLC/NLPID method.
The encapsulation method for a Relayed PPPoA connection can
be configured via the CLI.
HDLC
Framing The PPP frames arriving via a PPTP tunnel, and the PPP frames
encapsulated on ATM connections, differ in format.
The PPP format on AAL5 follows RFC 1661 PointtoPoint
Protocol (PPP)":
P_ID Information Padding
PPP Frame
Address Control P_ID Information Padding
(FF) (03)
PPP Frame
The latter format has two additional bytes in front of the frame
(FF03) inherited from another encapsulation i.e. RFC 1662 PPP
in HDLClike framing".
Whereas the PPP format within a tunnel follows PointtoPoint
Tunneling Protocol (PPTP)":