Reading between the lines (see bellow) it seems that PPP is NOT encapsulated
in LAPD. It looks like PPP starts encapsulating network traffic on its own
as soon as LAPD has set up the ISDN call. Please correct me if I am wrong.
Thank You.
"3.3. Link Dead (physical-layer not ready)
The link necessarily begins and ends with this phase. When an
external event (such as carrier detection or network administrator
configuration) indicates that the physical-layer is ready to be used,
PPP will proceed to the Link Establishment phase.
During this phase, the LCP automaton (described later) will be in the
Initial or Starting states. The transition to the Link Establishment
phase will signal an Up event to the LCP automaton."
Pierre-Alex
-----Original Message-----
From: Jim Dixon [mailto:[EMAIL PROTECTED]]
Sent: Friday, December 29, 2000 3:42 PM
To: Pierre-Alex
Subject: RE: ISDN LAPD versus PPP
Here are some RFC's that you might read that might help.
http://www.isi.edu/in-notes/rfc1661.txt
http://www.isi.edu/in-notes/rfc2516.txt
http://www.isi.edu/in-notes/rfc2878.txt
Jim
-----Original Message-----
From: Pierre-Alex [mailto:[EMAIL PROTECTED]]
Sent: Friday, December 29, 2000 3:11 PM
To: Cisco
Subject: ISDN LAPD versus PPP
Is it a true statement to say that if your using ppp encapsulation on your
interface, the ppp packets are encapsulated in the LAPD packets. If not,
where else would ppp packets be encapsulated?
I have found no document showing the relationship of ppp and LAPD if you
have some reference I would greatly appreciate.
Pierer-Alex
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