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- Xref: sparky comp.unix.sys5.r4:1182 comp.unix.questions:15354 biz.comp.telebit.netblazer:22 comp.protocols.tcp-ip:5885
- Path: sparky!uunet!elroy.jpl.nasa.gov!ames!biosci!joes!kumr!pozar
- From: pozar@kumr.lns.com (Tim Pozar)
- Newsgroups: comp.unix.sys5.r4,comp.unix.questions,biz.comp.telebit.netblazer,comp.protocols.tcp-ip
- Subject: Re: Netblazer
- Message-ID: <1993Jan8.163718.8994@kumr.lns.com>
- Date: 8 Jan 93 16:37:18 GMT
- References: <MLEWIS.93Jan7101356@yoyo.telebit.com>
- Organization: Late Night Software (San Francisco)
- Lines: 67
-
- mlewis@telebit.com (Mark S. Lewis) writes:
- >> I currently attach via SLIP over a leased line using v.32bis/v.42bis
- >> modems from a Dell machine (on my end) into a smartport on a Telebit Netblazer.
- >
- >> Would I see any significant increase in throughput using this same
- >> physical connection (v.32bis/v.42bis) but replacing the Dell SLIP
- >> with a Netblazer on my end -- and connecting my machines via ethernet
- >> to the Netblazer?
- >> [...]
- >> Larry Snyder internet: larry@gator.rn.com
- >
- >No I don't think you would get a significant performance increase by
- >putting a NetBlazer at both ends. You are using relatively slow
- >serial lines limited by V.32bis modulation with whatever compression
- >you get with V.42bis.
- >
- >Mark S. Lewis inet: mlewis@telebit.com
-
- I disagree. I think you will get some increase in preformance, depending
- on how loaded your box that is doing the routing is. Routing IP packets
- takes a certain amount of CPU over head as well as servicing the serial
- line interupts that happen every time you get a packet in. Using 16500
- helps.
-
- BTW there are other soultions to netblazers...
-
- We have been playing with a number of router soulutions for our coopertive
- network, "The Little Garden". Currently we are running KA9Q/NOS for our
- dial-up routers. The other day I brought up 386BSD as a router and found
- that ping times went down by about 10 to 20%. With a '386DX-16 running
- KA9Q tied via v.32bis/v.42bis Forval modems to a '386SX-25 runing KA9Q
- our 56byte ping times were about 200 to 240mS on an unloaded circuit.
- With 386BSD on just one side the ping times were about 190 to 210 mS.
- Same hardware, just one side had different router software.
-
- After experimenting with 386BSD a bit, I am going to put more of an effort
- into getting something ship shape to run off a floppy and try to replace
- a couple of our links with it.
-
- A side note. Netblazer software was based on the KA9Q software. Enough
- work has gone into it by now that I imagine that it doesn't look like KA9Q
- any more, but I wonder if it still has the same problems that KA9Q has,
- like memory leakage and high latency. Perhaps Mark could comment on the
- Netblazer software.
-
- Our cost per KA9Q box is about $600 as it is only a fast '386 mother
- board with 1Meg of memory, 1.4 meg floppy drive and controller, case/power
- supply, keyboard, ethercard(SMC), 16550 stuffed async card, monitor and
- video card.
-
- Phil Karn asks for about $50 for commercial installation of the KA9Q
- software. 386BSD is currently availible for free off of the net from
- agate.berkeley.edu. Bill Joliz does ask for a contribuition of $50 for
- the binaries and $100 for the source.
-
- At the last ONEBBS con in Denver, there was a demonstration of a device
- called "Slip-on-a-Stick". It was a box that was about 10"x6"x2" tall, and
- would do slip. I don't know if it will do the right thing with subnetting
- as I only saw it work with one device on it. The price was less than a
- grand.
-
- Tim
-
- --
- Internet: pozar@kumr.lns.com FidoNet: Tim Pozar @ 1:125/555
- Snail: Tim Pozar / KKSF / 77 Maiden Lane / San Francisco CA 94108 / USA
- Voice: +1 415 788 2022
-