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Exchange 2010

Ok here is a question. I have installed Exchange on 2 server to use DAG..  Fine this covers failover for the Database. However this does't provide failover for CAS. I investigated it and found that you need to use NLB to provide Failover for CAS. ok Understand. So this is how i see it...

SRV1 - HUB, DAG AND CAS
SRV2 - HUB, DAG AND CAS
SRV3 - NLB FAILOVER FOR CAS And HUB for SRV1 AND SRV2

So how would I failover SRV3? I have access to SRV4 could this be used as a failover for SRV3 and if so how do you setup nlb for this... SRV3 and SRV4 are DC with DNS on

Thanks
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brookejp
Asked:
brookejp
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1 Solution
 
Jian An LimSolutions ArchitectCommented:
your solution realy looks diferent from what i have seen out there.
But i might be wrong because your case is unique.

1st, you do not mix DAG with hub and CAS.

DAG use failover clustering and CAS use network load balancing
both technology are different and cannot be in the same box.

my recommendation is to do
SVR1 DAG (failover clustering)
SVR2 DAG (failover clustering)
SVR3 CAS and HUB (NLB)
SVR4 CAS and HUB (NLB)



some reading from
http://www.windowsitpro.com/article/john-savills-windows-faqs/q-if-i-install-client-access-server-cas-on-an-exchange-2010-mailbox-server-that-s-a-member-of-a-database-availability-group-dag-can-i-still-use-software-to-load-balance-the-cas-103195.aspx

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brookejpAuthor Commented:
the reason CAS HUB AND DAG are on SRV1 and SRV2 is because SRV3 and SRV4 have AD running on them while SRV1 and SRV2 are just members....   this was done for perfomance and as i don't like running Exchange on AD machines. Also would just "NLB"ing  SRV1 and 2 provide failover for CAS as SRV 3 & 4 backup eachother anyway thanks to AD. running on those 2 machines
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Jian An LimSolutions ArchitectCommented:
also, you suppose not to run AD on any of these server
you simply cannot NLB a Domain controller.

As SVR1 and SVR2 is DAG, it used the failover clustering, so all your CAS and HUB will not work there.


have you think about virtualization to archieve what you want??
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brookejpAuthor Commented:
OK thanks.....  I do appreciate all what you say......what about this setup..... all running server 2008 and Exchange 2010

ALL SERVERS ARE PHYSICAL MACHINES NO VM

SRV 1 = (DOMAIN CONTROLLER) AD, DNS, DHCP , FILE SHARE 1- NIC
SRV 2 = (DOMAIN CONTROLLER) AD, DNS, DHCP,  FILE SHARE 1- NIC
SRV 3 = CAS, HUB, DAG (MEMBER SERVER) 3 - NIC
SRV 4 = CAS, HUB, DAG (MEMBER SERVER) 3 - NIC
SRV 5 = NLB FOR SRV 3 AND 4 (MEMBER SERVER) 2 - NIC
ROUTER = INTERNET ACCESS

At the moment SRV 3 and 4 are running CAS HUB AND DRG and users and servers are logging no errors.....  Access to all services are been granted....

also i don't like runnning 2 VM's on 1 physical machine should the physical machine have harware failure it takes the VM's with it.....

also you quote "you do not mix DAG with hub and CAS."

what about

SRV 1 = (DOMAIN CONTROLLER) AD, DNS, DHCP , FILE SHARE - 1 NIC
SRV 2 = (DOMAIN CONTROLLER) AD, DNS, DHCP,  FILE SHARE - 1 NIC
SRV 3 = DAG (MEMBER SERVER) + VM 1 server to run as CAS, HUB - 3 NIC
SRV 4 = DAG (MEMBER SERVER) + VM 1 server ro run as CAS, HUB - 3 NIC
SRV 5 = NLB FOR SRV 3 AND 4 (MEMBER SERVER) - 2 NIC
ROUTER = FOR INTERNET ACCESS

I would be greatfull for a good setup you could recomment..

Thankyou so muc

J
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Jian An LimSolutions ArchitectCommented:
thats looks fine.

it probably not necessary for svr3 and svr4 to do CAS and hub.
choose either one and make them NLB so you got SVR5 and SVR3/4 to become CAS/HUB
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brookejpAuthor Commented:
Sorry a bit confused as to which setup you a prefering. I am usuming the latter

SRV 1 = (DOMAIN CONTROLLER) AD, DNS, DHCP , FILE SHARE - 1 NIC
SRV 2 = (DOMAIN CONTROLLER) AD, DNS, DHCP,  FILE SHARE - 1 NIC
SRV 3 = DAG (MEMBER SERVER) + VM 1 server to run as CAS, HUB - 3 NIC
SRV 4 = DAG (MEMBER SERVER) + VM 1 server ro run as CAS, HUB - 3 NIC
SRV 5 = NLB FOR SRV 3 AND 4 (MEMBER SERVER) - 2 NIC
ROUTER = FOR INTERNET ACCESS

so you are saying

SRV 1 = (DOMAIN CONTROLLER) AD, DNS, DHCP , FILE SHARE - 1 NIC
SRV 2 = (DOMAIN CONTROLLER) AD, DNS, DHCP,  FILE SHARE - 1 NIC
SRV 3 = DAG (MEMBER SERVER) - NLB NOID 1
SRV 4 = DAG (MEMBER SERVER) - NLB NOID 2
SRV 5 = CAS, HUB , HOST TO NLB SRV 3&4
ROUTER = FOR INTERNET ACCESS

Please can you show me the setup you propose like the above..  thanks

sorry to be a bit thick on this answer
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Jian An LimSolutions ArchitectCommented:

SRV 1 = (DOMAIN CONTROLLER) AD, DNS, DHCP , FILE SHARE - 1 NIC
SRV 2 = (DOMAIN CONTROLLER) AD, DNS, DHCP,  FILE SHARE - 1 NIC
SRV 3 = DAG (MEMBER SERVER)  - 1NIC   +  VM 1 server to run as CAS, HUB - 2 NIC
SRV 4 = DAG (MEMBER SERVER) - 1 NIC
SRV 5 = CAS, HUB (MEMBER SERVER) - 2 NIC

SVR3 and SVR4 using Clustering
VM1 and SVR5 using NLB



ROUTER = FOR INTERNET ACCESS


this document is exchange 2007 but the concept is the same
http://www.msexchange.org/articles_tutorials/exchange-server-2007/high-availability-recovery/load-balancing-exchange-2007-client-access-servers-windows-network-technology-part2.html
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brookejpAuthor Commented:
Thank you I understand.  I believe in your previous answer I was confused about where the CAS was NLB going.

Thanks. If i could i would reward you with a 1000points much deserved.
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brookejpAuthor Commented:
Just one more question not hard..   with the NLB what ports do i need to redirect for outlook 2007 to work I Know the ones for OWA and IIS etc. but not sure about the Outlook office 2007 programme one..  ie autodiscovery of creation of new profiles to find the exchange server etc...

Thanks
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brookejpAuthor Commented:
thanks
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brookejpAuthor Commented:
Deserved more than 500 points
0

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