[ExchangeList] Re: Exchange 2007 IS Store Does not Fail over when NIC 100Full

  • From: James Chong <jchong@xxxxxxxxxxxx>
  • To: "exchangelist@xxxxxxxxxxxxx" <exchangelist@xxxxxxxxxxxxx>
  • Date: Wed, 28 Nov 2007 13:44:57 -0500

http://www.msexchange.org
-------------------------------------------------------Thanks for the tip; I'll 
check the backup rate tonight and see if it's any better.


James Chong
Sr. Systems Engineer
InPhonic, Inc.
11130 Sunrise Valley Dr.
Reston, VA 20191
O (703) 657-4612
C (703) 863-1483
________________________________________
From: exchangelist-bounce@xxxxxxxxxxxxx [exchangelist-bounce@xxxxxxxxxxxxx] On 
Behalf Of Chris Buechler [msexchange@xxxxxxxxxxxxxxxxx]
Sent: Wednesday, November 28, 2007 12:35 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Exchange 2007 IS Store Does not Fail over when NIC 
100Full

http://www.msexchange.org
-------------------------------------------------------Wright, Steve wrote:
>
> Also, if you want to have the nic at 100/Full why don’t you try
> setting the switch port to 100/full and leaving the Nic setting on Auto?
>

*Never* force one end and not the other, that's a guaranteed way to get
a duplex mismatch. If you set the switch to 100/full and the NIC to
auto, you'll end up with a switch port on full duplex and the NIC on
half duplex.

It's recommended to leave both sides on auto. No network vendor
recommends forcing speed and duplex because it leads to it being done
inconsistently and hence leads to widespread duplex mismatches which
cause severe performance problems.

James: it works on auto, leave it auto. On the switch and the server.
The fact that things stop working when you force duplex tells me you're
probably creating a duplex mismatch and the subsequent network problems
it creates are causing problems for Exchange.

Recommended reading:
http://www.sun.com/blueprints/0704/817-7526.pdf
http://en.wikipedia.org/wiki/Autonegotiation


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