I'm having an issue with transfer speeds on my local network and I'm
looking for some pointers on what I might do to fix it up.
My network is pretty simple.
Internet -- DSL -- Medusa -- Local Net -- Leviathan
Medusa is (PII-400):
FreeBSD medusa.pbegames.com 4.4-STABLE FreeBSD 4.4-STABLE #2: Tue Apr 16
09:45:14 EDT 2002
Leviathan is (AMD TBird-900):
Win98 with the latest service packs, patches, etc.
The DSL connection is running user ppp with nat.
The local net is a D-Link hub (10baseT/UTP).
The problem:
Transfers from Leviathan to Medusa run at ~900 kB/s
Transfers from Medusa to Leviathan run at ~55 kB/s
Interestingly, transfers from the Internet to Leviathan run at the expected
rate (~75 kB/s -- about normal for my local DSL provider).
I've been testing transfer rates using a 9 MB file.
I first noticed this with Samba, but I can reproduce it with scp and ftp as
well. I've done some looking around at various sysctl and registry
settings, but I haven't seen anything that jumps out.
The local interface on Medusa (LinkSys LNE100 I believe) looks like this:
dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::204:5aff:fe57:5cc2%dc0 prefixlen 64 scopeid 0x1
inet 192.168.99.1 netmask 0xffff0000 broadcast 192.168.255.255
ether 00:04:5a:57:5c:c2
media: Ethernet autoselect (10baseT/UTP)
status: active
I've swapped out all cables, and transfers between Leviathan and a test
machine internally work fine over all ports on the hub. I'm leaning towards
a problem with the tcp settings between the two machines, but have about
reached the limits of my knowledge in this area. Any pointers to where to
look would be great. I can pass on more information if needed (sysctls,
tcpdump, etc.).
TIA,
Mark Thomas
---
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