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Re: inherent packet loss with MacOS X 10.3.9 plain and server?


On Jun 15, 2005, at 3:34 PM, Noah Abrahamson wrote:

At 12:25 PM -0400 6/15/05, Frank Lowney wrote:

Initially, we got into looking at this when one of our Networking
colleagues pointed out the packet loss saying that he thought there
was something wrong with the machine.  This appears not to be the
case as all the MacOS X equipment behaves similarly.

So, does MacOS X and Apple hardware have an inherent fault or is our
testing method suspect?


Can you supply the output of ifconfig? Could it be that your duplexing
setup is incorrect? For example, I know of an Xserve-Cisco combination
where the server's NIC didn't autonegotiate the correct settings and had
to be manually configured for 100BT (full duplex). Throughput suffered
and tests like yours suggested investigation.

We experienced this type of issue. For reasons not fully clear to me, the Univ. network folks say that Macs have to be manually set and do not auto negotiate, or at least not with the routers/etc used by the university. If I leave the box on Auto, I get either faulty connect- and sometimes dropped packets or no connection- 100% packet loss. If I set to 100 full duplex, I get no packet loss.

NOTE: new email address
--
Thomas Waters
Director of Information and Communication Services
University of Pittsburgh School of Pharmacy
412-383-7471
email@hidden
http://www.pharmacy.pitt.edu

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References: 
 >inherent packet loss with MacOS X 10.3.9 plain and server? (From: Frank Lowney <email@hidden>)
 >Re: inherent packet loss with MacOS X 10.3.9 plain and server? (From: Dan Shoop <email@hidden>)
 >Re: inherent packet loss with MacOS X 10.3.9 plain and server? (From: "Noah Abrahamson" <email@hidden>)



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