We've got Barracudas, LB440s, and had a lot of pain with them, all the way through v3.5, 4.0 and 4.1 firmware.
After playing wack-a-mole with firmware upgrades for almost a year, both boxes in an HA pair being borked by a firmware upgrade and RMA'd (fortunately not at the same time!) we've finally got some stability on 4.2.0.015 The only positive thing I can say is that the LinkLoad tech support team (in India, but very reasonable command of English) are generally responsive - like you can ring them and for P1/P2 issues they'll be wanting to log into the box within minutes. They really do try and get to the bottom of crashes (they can get into the boxes via an SSH tunnel you initiate from the device, and with a USB stick in the back of the unit for temporary storage they can get core dumps off the box) and generally most of the crashes have only meant a 1-2 min service interruption as the errant process typically realises it's fallen over and restarts itself on the same LB device - the HA failover between the devices is not seamless for users and we've never seen an automatic failover. If they get a good core dump there's usually a new code release within a week or so, they have a direct line to the software team. We would have used our existing Foundry/Brocade GTC LBs but they were not qualified for Exchange 2010 LB, and the forklift upgrade to go to the latest and greatest Brocade LBs was a significant cost outlay. We didn't review the Kemp LBs, I though if I went with a name that I had heard of from other products, and didn't got for the cheapest I would be buying into something with some track record and quality. I suspect that we've done a lot of the bug fixing for their product, and if we had the experience we had now when we bought them 18 months ago I think I would be reasonably happy with them. I'm still suspicious about the HA though. _________________________________ Tomo | Senior Infrastructure Engineer - Networks, Telecoms & Security. Direct line +44 (0)20 7000 7777 www.london.edu<http://www.london.edu/> | London experience. World impact. Connect with us: [Description: twitter.jpg] <https://twitter.com/LondonBSchool> Follow us on Twitter<https://twitter.com/LondonBSchool> [Description: facebook.jpg] <http://www.facebook.com/pages/London-United-Kingdom/London-Business-School/14027365105> Become a fan on Facebook<http://www.facebook.com/pages/London-United-Kingdom/London-Business-School/14027365105> From: Candee [mailto:[email protected]] Sent: 01 May 2013 16:50 To: MS-Exchange Admin Issues Subject: Re: CAS 2010 load balance recommentation I've heard good things about Kemp; we're actually evaluating their product now. On Wed, May 1, 2013 at 11:43 AM, Todd Lemmiksoo <[email protected]<mailto:[email protected]>> wrote: Our two Exchange 2010 CAS servers run in VMware 5.0 UCS environment. I am looking for load balance suggestions. -- T. Todd Lemmiksoo --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist --- To manage subscriptions click here: or send an email to with the body: unsubscribe exchangelist
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