100Mbps Enet is very slow - how to debug?

  • Thread starter Thread starter Steve
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S

Steve

WinXP desktop and Vista laptop, connected via Enet ADSL modem+switch.
Backing up to the desktop takes many hours even tho it's only a 160GB disk
less than half full.

Network utilisation is at about 0.2%. Can this be right? I've tried
resetting network adapters to default, swapping cables, etc. etc. Should I
try a new switch? What else can I try? Renewing everything networkish and
going wireless at the same time seems a bit drastic..

Ideas?
 
Hi'
Do you have a combo Modem/Router, or you are backing up through the
Internet.
If the IPs of the computers are Not local (the 192.168.xxx.xxx) type, it
means that you do not have a Local Network, and the backing up is done at
Internet "Speed".
As a frame of reference, http://www.ezlan.net/net_speed.html
Jack (MS, MVP-Networking)
 
I am using the local connection - it's a Zyxel P660H with latest firmware,
integrated 4 port switch. Addrs. 192.168.1.33 & .35, everything shows it
should be running at 100Mbps.

I've seen some posts here about using "netsh" to turn off a Vista autoconfig
TCP parameter. I'll try that next, but it's not really satisfactory that
Vista autoconfigs to something well nigh useless, is it......
 
Backing up to the desktop takes many hours even tho it's only a 160GB disk
less than half full.
Click to expand...

I've seen this a couple of times and our resident network guru told me
it's sometimes due to auto-config 10/100 cards "hunting". Try forcing
the network cards on both machines to a single speed/duplex setting
and retry your transfer.

Government Health Warning: Just because I code sockets programs
doesn't mean I'm an expert on networks. I may just be smoking dope,
but it's worked for me in the past.

--
Bob Moore
http://bobmoore.mvps.org/
(this is a non-commercial site and does not accept advertising)
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