Date: Tue, 17 Feb 1998 10:02:57 -0600 (CST) From: Jim Bryant <jbryant@unix.tfs.net> To: dennis@etinc.com (dennis) Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Networking Oddity, 16k/sec over 10B2, long pauses. Message-ID: <199802171602.KAA03982@unix.tfs.net> In-Reply-To: <3.0.32.19980217103616.00fc3490@etinc.com> from dennis at "Feb 17, 98 10:36:17 am"
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In reply: > At 04:51 PM 2/16/98 -0700, Brandon Gillespie wrote: > >We have a 10B2 network. It was getting a little large, so we installed an > >Asante 10B2 hub. Before the hub installed I could get great transfer > >rates. Now, I get 16k/sec transfer rates (via ftp). When I turn on > >hashing in ftp I see it download a chunk, then wait, then download a > >chunk, then wait. The waits are usually a second long. I am also seeing > >a collision light on the hub. I'm wondering if this pause is FreeBSD > >collecting its marbles after a collision; and what could possibly be > >causing the collision in the first place. *Nothing* was changed on the > >network (or nodes on the network) other than installing the hub and > >splitting into segments. Also, this problem only appears with FreeBSD > >boxes--ftping from a powermac over the hub to a Digial Unix box gets > >decent transfer rates. > > Its more likely your hub dropping a packet. The collision light could also indicate SWR. Check for PROPER termination. Terminating at the tee can cause reflections. Attach a stub [a foot or two of RG-58], and terminate the stub. In 10B2, we are talking about transmission lines, treat them as such. jim -- All opinions expressed are mine, if you | "I will not be pushed, stamped, think otherwise, then go jump into turbid | briefed, debriefed, indexed, or radioactive waters and yell WAHOO !!! | numbered!" - #1, "The Prisoner" ------------------------------------------------------------------------------ Inet: jbryant@tfs.net AX.25: kc5vdj@wv0t.#neks.ks.usa.noam grid: EM28pw voice: KC5VDJ - 6 & 2 Meters AM/FM/SSB, 70cm FM. http://www.tfs.net/~jbryant ------------------------------------------------------------------------------ HF/6M/2M: IC-706-MkII, 2M: HTX-212, 2M: HTX-202, 70cm: HTX-404, Packet: KPC-3+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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