Second CAS/HT Server

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Elvis - 25 Jul 2008 20:45 GMT

Hi,

I currently have an Exchange 07 environment where my Mailbox is CCR Cluster
and on its own Server.
My HT/CAS are on a seperate Server. What happens if I add another HT/CAS
(second) Server to the same site, forest and domain.
The idea is if the first HT/CAS Server blows up, this second HT/CAS Server
will take over.
What configurations are required to achieve this.

Thanks

Elvis

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Mark Arnold [MVP] - 25 Jul 2008 21:28 GMT

>Hi,
>
[quoted text clipped - 9 lines]
>
>Elvis

No worries there. CAS and HT can be NLB'd. See:
http://www.google.com/search?sourceid=navclient&ie=UTF-8&rlz=1T4SUNA_enUS276US27
7&q=CAS+NLB
and see the third offer:
http://www.msexchange.org/articles_tutorials/exchange-server-2007/high-availabil
ity-recovery/load-balancing-exchange-2007-client-access-servers-windows-network-
technology-part1.html
for a step by step article.

Reply to this Message

Elvis - 28 Jul 2008 19:08 GMT

Hi Mark,

Thanks for the reponse.
Is it possible to have two CAS Servers in the same forest, domain and site
without being network load balanced?
and if so what are the benefits of doing this?

Thanks

Elvis

> >Hi,
> >
[quoted text clipped - 15 lines]
> http://www.msexchange.org/articles_tutorials/exchange-server-2007/high-availabil
ity-recovery/load-balancing-exchange-2007-client-access-servers-windows-network-
technology-part1.html
> for a step by step article.

Reply to this Message

Mark Arnold [MVP] - 29 Jul 2008 00:00 GMT

>Hi Mark,
>
>Thanks for the reponse.
>Is it possible to have two CAS Servers in the same forest, domain and site
>without being network load balanced?
>and if so what are the benefits of doing this?

As many as you want. If you don't present a unified name space you
have to tell all the users that they should try cas1.domain.com or
cas2.domain.com and if one seems "slow" they should try the other.
Dunno about you but that doesn't seem terribly viable.
Of course, if you get to a point where a CAS gets busy you should be
talking thousands of users and if that's the case you should have had
an Exchange architect design the environment properly in the first
place.

Reply to this Message

Elvis - 29 Jul 2008 14:24 GMT

Hi Mark,

Thanks for the info. Yes NLB is desired technically but unfortunately other
factors dictate otherwise.

Thanks

Elvis

> >Hi Mark,
> >
[quoted text clipped - 11 lines]
> an Exchange architect design the environment properly in the first
> place.

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