RE: Vista Latency Issue

Thanks Jon for the suggestion:

Have already tested Vista in Worgroup (default firewall rules) vs. Vista on
Domain (with group policy firewall settings) here is a recent ping -t output
over about 1.5 hours:

Vista worgroup:

Packets: Sent = 4631, Received = 4588, Lost = 43 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 2884ms, Average = 10ms

Vista Domain:

    Packets: Sent = 4808, Received = 4780, Lost = 28 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 2660ms, Average = 6ms

I will be testing on another subnet soon.

Alan

Alan Willcuts
Information Systems
Department of Recreational Sports
UC Berkeley

510 643-3867

-----Original Message-----
From: Jon Forrest [mailto:jlforrest_at_berkeley.edu]
Sent: Tuesday, May 29, 2007 8:51 AM
To: Alan Willcuts
Cc: micronet-list_at_listlink.berkeley.edu
Subject: Re: [Micronet] Vista Latency Issue

Alan Willcuts wrote:
> We are having a latency problem with our Vista machines with average
> ping times of 4 ms and above and 1-2 % packet loss pinging our router.
> The same machine and hardware with XP does not experience any latency.
>
> We do have a hardware firewall on our subnet between our LAN and the
> router and there is no latency within the LAN. Attempts at updating nic
> drivers, uninstalling the NIC have not improved the situation.
>
> Machines are on the Campus AD and we are using Windows Vista firewall
> with many of the predefined rules implemented, no ipsec currently.
> Symantec's Network drive scanning and some other features are off.
>
> Has anyone else seen similar behavior or have any ideas about what may
> be causing this?

This is indeed a puzzlement. I would suggest putting a
non CalAD Vista machine on your LAN to see if the issue
remains. Likewise, you could also take one of your Vista
machines with the problem and put it on another subnet
to see if the problem follows the machine. These experiments
will help you eliminate (or suspect) the NIC, NIC drivers,
and your firewall as possible causes.

For what it's worth, I've been running Vista on my main
desktop machine (not in CalAD, no firewall) since forever
and I've had no problems of any kind.

Cordially,

-- 
Jon Forrest
Unix Computing Support
College of Chemistry
173 Tan Hall
University of California Berkeley
Berkeley, CA
94720-1460
510-643-1032
jlforrest_at_berkeley.edu
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