Date: Wed, 17 Apr 1996 11:03:35 -0700 (PDT) From: Doug White <dwhite@riley-net170-164.uoregon.edu> To: John McNamee <jpm@microwiz.com> Cc: questions@freebsd.org Subject: Re: User vs. Kernel PPP Message-ID: <Pine.BSF.3.91.960417110143.5027I-100000@riley-net170-164.uoregon.edu> In-Reply-To: <199604171236.FAA12917@smoke.microwiz.com>
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On Wed, 17 Apr 1996, John McNamee wrote: > I've Read The Fine Manual and searched the mail archives for this, but I can't > find an explanation of the tradeoffs between user and kernel mode PPP in 2.1R. > > I'm running kernel PPP now, because I had to blindly pick one and I assumed > that a kernel implementation would be more efficient. I'd like to get some > real information to either confirm that choice or give me a reason to switch. I believe you're correct. User Mode PPP (aka ijppp) is easier to get going since it works like a shell and has nice script debugging features. 'set debug chat' makes it really easy to find that stupid mistake in your login script :-) Plus, you can get stats and even log in manually. But kernel mode is more efficient. > > My primary use of PPP is supporting async dialup users. I connect to the > Internet with an Ascend Pipeline router, so "outbound" PPP features like dial > on demand don't matter in my environment. Having said that, I'm sure that > future users who search the mail archives would appreciate replies that cover > both sides. I think the concensus here is that kernel mode would be better, but there has been some discussions on setting up ijppp for serving. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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