Re: [Veritas-bu] Very slow client

Hi All,

This debate will continue to go on forever. I have found that hard coding works extremely well when set. In many cases setting to auto and auto still gave issues.

As far as 1GB copper is concerned, the IEEE standard should be followed to the nth degree. Use a minimum of CAT 5E or definitely CAT6 cable and don’t go beyond 90 metres.

Going outside of these specifications will cause you issue, a very expensive experience as on of my clients found? They had to switch all NICS and switch ports to 100 full duplex for DataProtector and NetBackup as their network was designed to CAT5.

Rather change to 1GB fibre which will always work.

Kind Regards,

Clem Kruger

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Paul Keating
Sent: 17 August 2007 15:30 PM
To: Kennedy, Cameron; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Very slow client

any client set to auto detect is only very slow if there is a misconfiguration in the chain.

auto neg has worked flawlessly for years assuming both sides are configured to auto.

The documented (IEEE 802.3??) behaviour if one side is auto and the other side hardcoded is for the auto neg configured side to go to 100Mb/s Half Duplex. (lowest common denominator.)

Since the "hardcoded" side is usually set to FULL, you end up with a duplex mismatch which kills performance.

If you've still got old Sun HME cards ardoun, there is some auto-meg issues with those, in combination with some older Cisco versions, but for the most part, Auto is where it's at.

Auto is actually a requirement for proper flow control in GigE.

Paul

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Kennedy, Cameron
Sent: August 15, 2007 7:49 PM
To: Deiter, Scott; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Very slow client

did you check network settings on the NIC? Is it set to 100/Full (or whatever your network standard is)? I find any Windows clients set to auto detect run very slow.

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