Are you sure the duplex settings are correct on all nics? If they are on
coax or a hub, it should be set to half duplex. If you are connected to a
switch or a crossover cable, you may use full duplex on the nic only if
the other end is set to full. I wouldn't trust any "Auto" settings until
it can be assured that it doesn't hurt.
On Fri, 12 May 2000, Yann Ramin wrote:
>-----BEGIN PGP SIGNED MESSAGE-----
>
>Hi there. I have an interesting problem (figured it out myself) but I'm
>wondering why it is occuring.
>
>I have a setup with Two FreeBSD machines (3.2 and 4.0 RELEASE), a Windows
>machine, and a NetBSD machine. The NetBSD machine has three 3Com 3C509/B NICs
>(ISA) and acts as a router to three subnets, one per machine. When I FTP
>something from the 4.0 to the 3.2 box, performance sucks. And not that the
>NetBSD machine is too slow, it seems neither the 4.0 or 3.2 is using the
>network like it should. Looking at the hub, I'm getting a pattern like this:
>
>Activity(3 secs) -- Pause (4 secs) -- Activity (2 secs) -- Pause (1 sec) --
>Activity (7 secs) -- Pause (7 secs)
>
>and on for a total throughput of 80KB/s. The same occurs from Windows to the
>4.0 box with Samba. I tried installing FreeBSD on the router, with no luck.
>The only solution I could come up with was to:
>
>sysctl -w net.inet.tcp.sendspace=2900
>sysctl -w net.inet.tcp.recvspace=2900
>
>This brings performance up to about 400KB/s, which is "ok" because of the extra
>latency of the router. I have another similar situation with two 4.0 boxes and
>iMacs running on two Cisco Catalyst 2924XL switches. If I use a plain
>vanilla 10Base hub I get a cool 620KB/s. Does anyone have any idea what is
>causing this?
>
>Yann
>
>--
>
>--------------------------------------------------------------------
>Yann Ramin [EMAIL PROTECTED]
>Atrus Trivalie Productions www.atrustrivalie.eu.org
> irm.it.montereyhigh.com
>Monterey High IT www.montereyhigh.com
>ICQ 46805627
>AIM oddatrus
>Marina, CA
>
>"All cats die. Socrates is dead. Therefore Socrates is a cat."
> - The Logician
>
> # fortune
>"To be responsive at this time, though I will simply say, and therefore
>this is a repeat of what I said previously, that which I am unable to
>offer in response is based on information available to make no such
>statement."
>--------------------------------------------------------------------
>
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>=/RT8
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