On Wed, 20 Oct 1999, Paul Yaskowski wrote:
> In a recent attempt to maximize my pathetic bandwidth, I noticed that
> pppd was not compressing packets. I read through pppd's man page, and
> from what I read, it should negotiate compression with my ISP
> automatically. Just for good measure, I turned on a few additional
> options, 'vj-max-slots' 16 and 'debug.'
...
> sent [IPCP ConfReq id=0x4 <addr 0.0.0.0> <compress VJ 0f 01>]
You request VJ compression.
> sent [CCP ConfReq id=0x2 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
You request packet compression.
> rcvd [IPCP ConfRej id=0x4 <compress VJ 0f 01>]
Your ISP rejects VJ compression (i.e., ISP does not support it).
...
> rcvd [LCP ProtRej id=0x4 80 fd 01 02 00 0f 1a 04 78 00 18 04 78 00 15
> 03 2f]
The ISP rejects protocol $80fd. Don't worry about it.
> If someone could inform me as to whether I forgot something, or my
> ISP does not support compression, i'd be thankful. On a side note,
> what does the last line, LCP ProtRej, mean? It seems interesting to
> me..
You never received a reply regarding your CCP (packet compression)
request, but it is rare for an ISP to support it. I personally agree with
Jamie Lokier's response; the built-in modem compression is "good enough."
Using the ppp packet compression (deflate or BSD) just increases your
system CPU and memory usage. Deflate/BSD make more sense for hardwired
connections.
Geof Goodrum
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