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10 Configuration and Use - Relayed PPPoA
The 'Active PPTP
Connections' table
'Active PPTP
Connections' table
components
106 / 300
The following figure shows the 'Active PPTP Connections' table:
In the example one active Relayed PPPoA connection is up.
Field
Description
Dial string
In your Dial Up application you are able to specify which PPPoA
entry (and PPTP profile) is to be used by adding the appropriate
dial string. This dial string 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
Encap
Indicates the applied encapsulation method for PPP frames in the
VC.
The AST570 supports both the VC MUX method (default) and
the LLC/NLPID method.
The encapsulation method for a Relayed PPPoA connection can
be configured via the CLI.
HDLC
The PPP frames arriving via a PPTP tunnel, and the PPP frames
encapsulated on ATM connections, differ in format.
Framing
The PPP format on AAL5 follows RFC 1661 Point to Point
Protocol (PPP)":
Whereas the PPP format within a tunnel follows Point to Point
Tunneling Protocol (PPTP)":
Address
(FF)
The latter format has two additional bytes in front of the frame
(FF 03) inherited from another encapsulation i.e. RFC 1662 PPP
in HDLC like framing".
. Via the CLI you can configure a specific QoS profile(*).
PPP Frame
P_ID
Information
Control
P_ID
(03)
Padding
PPP Frame
Information
Padding
3EC 17766 AAAA TCZZA Ed. 04
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