Kemp will work just fine, as long as you get a unit large enough to meet your needs. You'll need AT LEAST a 2x LM-2500 and it seems more likely that you'll need a 2x LM-3500.
Still much less than an equivalent F5 solution. Do you understand the concept of SNAT and IP affinity? If so, you can see that "by default" if you have a group of users all connecting from a single SNAT address and you are using IP affinity for load-balancing (which you must for Outlook Anywhere and it's very inefficient if you DON'T for OWA and EAS), then all of those users coming from the SNAT address would be targeted to the same server behind the load balancer. Your LB solution needs a way to break those up, but to do so predictably so that source computer <-> destination computer mapping is maintained properly withOUT asynchronous routing. Enter the world of HTTP Keepalives and port masking... Kemp, F5, and Cisco provide ways to do this. Last time I checked - no one else did (although that may have changed - don't quote me). Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: helpdesk UK [mailto:uk.helpd...@gmail.com] Sent: Tuesday, January 04, 2011 1:55 PM To: MS-Exchange Admin Issues Subject: Re: Designing & Implementing Exchange 2010 in the new year. For HLB it seems to be leaning more towards Kemp Technologies from today's meeting. The discussion was around the cost factor purely. :( 2 * 5500 http://www.kemptechnologies.com/uk/server-load-balancing-appliances/product-matrix.html If for some reason as you mention the "impact" it will have on the design can you please touch on a little so I can debate this once again with the team and IT Director as some are very keen on F5. You are correct regarding the CAS/HT but overall the design is a bit woolly I completely agree. The reason being we have to have the requirements in place by end of Jan ....start sourcing the kit so it is all paid off before April so I have been told. :( Yes this will be a Fibre SAN solution with VMware due to saving rack space & power in the data center (this will be hosted externally) I read up on the DAS recommendations as well and JBOD solutions on HP website. Many MS recommendations as well on JBOD and go backup less !!! The concept is very nice. :) Thank you Jim On 4 January 2011 16:12, Michael B. Smith <mich...@smithcons.com<mailto:mich...@smithcons.com>> wrote: I had not seen those - thanks for posting them. I'm not thrilled with #3 - they gloss over the CAS/HT planning and don't really discuss the impact that your choice of HW LB has on CAS planning (all of F5, Cisco, and Kemp Technologies have solutions that deal with SNAT sources so that IP affinity can be dealt with properly). It also assumes SAN. I know that's a requirement in some environments, but in general - even for the BIG deployments - I've been deploying 2010 on DAS. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com<http://theessentialexchange.com/> -----Original Message----- From: Gary Babb [mailto:gsb...@hotmail.com<mailto:gsb...@hotmail.com>] Sent: Tuesday, January 04, 2011 10:17 AM To: MS-Exchange Admin Issues Subject: re: Designing & Implementing Exchange 2010 in the new year. Microsoft has written white papers on deploying Exchange 2010 for 500, 9,000 and 16,000 mailboxes. They are a great read, see white paper description below from Microsoft: This white paper provides an example of how to design, test, and validate an Exchange 2010 solution for customer environments with 9,000 mailboxes deployed on Dell server and storage solutions. The step-by-step methodology in this document walks through the important design decision points that help address key challenges while ensuring that core business requirements are met. Here are the links to each white paper: 1. 500 Mailboxes - http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e0e93251-fc04-4a18-8aa0-23817b6d0c97 2. 9,000 Mailboxes - http://www.microsoft.com/downloads/en/details.aspx?FamilyID=c89c9e7b-9b70-4370-8db9-593cbe518791 3. 16,000 Mailboxes - http://www.microsoft.com/downloads/en/details.aspx?FamilyID=987882fb-5286-48a6-800f-64665a278613 --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
