On Thu, 11 May 2000, Chris Malley wrote:
|A related question: Can someone recommend a reference that
|describes the various compression schemes (CCP, BSD,
|Van Jacobson) and how they're used by PPP? I'd like to
|expand on my rather superficial understanding of this
|aspect of PPP.
The VJ header compression is a special compression for IP headers that
takes advantage of the paticular structure of IP headers.
CCP is the protocol that PPP uses to negotiate various software data
compression algorithms.
BSD compression is a software data compression algorithm.
The RFCs that define these are
RFC 1144 - Van Jacobson IP header compression
RFC 1962 - Compresson Control Protocol, CPP
RFC 1977 - BSD compression
and are available by searching for them at
http://www.rfc-editor.org/rfcsearch.html
I don't know of any other source for detailed information about VJ header
compression or BSD compression.
There is a book that describes the basic principles of PPP and includes a
section on CCP, but only briefly describes the others and the way in which
their use in PPP is negotiated, which, I believe, was a good editorial
decision. It's a slim book and I like it, but it did require a certain
amount of perseverance on my part to understand enough to appreciate it. :)
"PPP Design and Debugging," by James Carlson, Addison-Wesley.
---
Clifford Kite Not a guru. (tm)
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