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Windows Server Forum / Exchange Server / Design / February 2007Multiple CAS, HUB, UM servers
In a single site, if we have multiple CAS, HUB & UM servers, if/how is the traffic load balanced between them? >In a single site, if we have multiple CAS, HUB & UM servers, if/how is the >traffic load balanced between them? UM traffic isn't going to be load balanced by Exchange because the SIP gateway will point traffic to the box that manages the extensions. http://markarnold.blogspot.com/2007/01/exchange-2007-when-to-nlb-and-when-not.ht ml#links and Neil's comment adds a little extra to the debate. In short, it all depends on what you implemented. Sometimes you will want to implement NLB, other times you won't need to because Exchange does it for you. Neil explains about CAS and ISA, which is pretty cute. I should have clarified that the ISA portion is only for HTTP access. If someone is looking to load balance POP, IMAP, etc, that's a different story. ;)  SignatureNeil Hobson Exchange MVP http://www.msexchange.org/Neil_Hobson/ >>In a single site, if we have multiple CAS, HUB & UM servers, if/how is the >>traffic load balanced between them? [quoted text clipped - 8 lines] > does it for you. Neil explains about CAS and ISA, which is pretty > cute. Thanks for the link. However, it stated that you should remove SMTP from NLB. If you have multiple HUB's receiving email from a single gateway, then what is the preferred method to get mail to both? >>In a single site, if we have multiple CAS, HUB & UM servers, if/how is the >>traffic load balanced between them? [quoted text clipped - 8 lines] > does it for you. Neil explains about CAS and ISA, which is pretty > cute. this should work, configure that gateway to deliver to both HT's and configure Receive Connectors on both HT's. > Thanks for the link. However, it stated that you should remove SMTP from > NLB. If you have multiple HUB's receiving email from a single gateway, [quoted text clipped - 13 lines] >> does it for you. Neil explains about CAS and ISA, which is pretty >> cute. Responded to your private mails. Cheers. |
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