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To: Tom Samplonius <tom@haven.uniserve.com>
cc: questions@FreeBSD.org
Subject: Re: SLIP MTU in 1.1.5.1 
In-reply-to: Your message of "Wed, 08 Feb 95 15:53:56 PST."
             <199502082353.PAA13674@corbin.Root.COM> 
From: David Greenman <davidg@Root.COM>
Reply-To: davidg@Root.COM
Date: Wed, 08 Feb 1995 16:02:22 -0800
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>>
>>  How do you change the SLIP MTU on 1.1.5.1?  I have tried putting the 
>>line:
>>
>>options  "SLMTU=1500"
>>
>>in my kernel config file.
>
>   You can't reliably use an MTU this large without changing other things in
>the kernel. I'd recommend using an MTU of 552 - this usually acheives the best
>performance (several reasons why...but I won't go into this now). The above
>'options' line is correct except for the value being too large.

   Oh, one more thing...you *can* use a large MTU in 2.x if you like - 2.x
doesn't have the same problems (no fixed size tty ring buffer for one thing).

-DG