connection
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... packets in order. It is intended that PPP provide a common solution
for easy connection of a wide variety of hosts, bridges and routers ...
... The Link Control Protocol (LCP) is used to establish the connection
through an exchange of Configure packets. This exchange is complete,
and the LCP ...
... In the Closing state, an attempt is made to terminate the
connection. A Terminate-Request has been sent and the Restart
timer ...
... In the Request-Sent state an attempt is made to configure the
connection. A Configure-Request has been sent and the Restart
timer ...
... link is not in the Closed state, the
automaton attempts to terminate the connection. Futher attempts
to re-configure the link are denied until a new Open event occurs.
...
... link. The automaton waits in the Stopped or Starting states
for the next connection attempt.
Timeout (TO+,TO-)
...
... This event occurs when a Configure-Request packet is received from
the peer. The Configure-Request packet indicates the desire to
open a connection and may specify Configuration Options. The
Configure-Request packet is more fully described in a later
section.
...
... Implementation Note:
These events may occur on a connection which is already in the
Opened state. The implementation MUST be prepared to
...
...
However, it is not impossible that a correctly formed packet
will arrive through a coincidentally-timed cross-connection.
It is more likely to be the result of an implementation error.
At the very least, this occurance SHOULD be logged.
...
... The Terminate-Request packet indicates the desire of the peer to
close the connection.
Implementation Note:
...
... of LCP! This event communicates an unrecoverable error that
terminates the connection.
Receive-Echo ...
...
A Configure-Request packet is transmitted. This indicates the
desire to open a connection with a specified set of Configuration
Options. The Restart timer ...
...
A Terminate-Request packet is transmitted. This indicates the
desire to close a connection. The Restart timer is started when
...
... Description
An implementation wishing to open a connection MUST transmit a
Configure-Request. The Options field is filled with any desired
...
... LCP includes Terminate-Request and Terminate-Ack Codes in order to
provide a mechanism for closing a connection.
An implementation wishing to close a connection ...
... connection.
An implementation wishing to close a connection SHOULD transmit a
Terminate-Request. Terminate-Request packets SHOULD continue to
be sent until Terminate-Ack is received, the lower layer ...
... to this version of the protocol, the implementation SHOULD report
the problem and drop the connection, since it is unlikely that the
situation can be rectified automatically.
...