network-layer
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... encapsulation provides for multiplexing of different
network-layer protocols simultaneously over the same link. The
PPP ...
... (NCPs), which each manage the specific needs required by their
respective network-layer protocols. These NCPs are defined in
companion documents.
...
... Protocol field values in the "0***" to "3***" range identify the
network-layer protocol of specific packets, and values in the
"8***" to "b***" range identify packets belonging to the
...
... PPP MUST send NCP packets to choose and configure one or more
network-layer protocols. Once each of the chosen network-layer
protocols has been configured, datagrams ...
... NCP packets to choose and configure one or more
network-layer protocols. Once each of the chosen network-layer
protocols has been configured, datagrams from each network-layer ...
... network-layer
protocols has been configured, datagrams from each network-layer
protocol can be sent over the link.
...
...
It is important to note that only Configuration Options which are
independent of particular network-layer protocols are configured by
LCP. Configuration of individual network-layer ...
... network-layer protocols are configured by
LCP. Configuration of individual network-layer protocols is handled
by separate Network Control Protocols (NCPs ...
... The receipt of the LCP Configure-Request causes a return to the Link
Establishment phase from the Network-Layer Protocol phase or
Authentication phase.
...
... links it may be desirable to require a peer to authenticate
itself before allowing network-layer protocol packets to be
exchanged.
...
...
Advancement from the Authentication phase to the Network-Layer
Protocol phase MUST NOT occur until authentication has completed. If
...
... Network-Layer Protocol Phase ...
... state, PPP will carry the
corresponding network-layer protocol packets. Any supported
network-layer protocol packets received when the corresponding NCP ...
... corresponding network-layer protocol packets. Any supported
network-layer protocol packets received when the corresponding NCP is
not in the Opened state ...
... packets. When the link is closing, PPP informs the network-layer
protocols so that they may take appropriate action.
...
... NCP that the link is
entering Network-Layer Protocol phase. That is, the This-Layer-Up
action from LCP ...
... NCP that the link is
leaving Network-Layer Protocol phase. That is, the This-Layer-
Down action from LCP ...
... links it may be desirable to require a peer to
authenticate itself before allowing network-layer protocol packets
to be exchanged.
...