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HUB NLB for Internet Inbound Mail

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HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:00:55 AM   
madcow

 

Posts: 895
Joined: 28.May2001
From: Planet, Earth
Status: offline 		I understand we can NLB the HUBza for outbound mail with Exchange 2007 SP1.

I am planning to have 2 HUBs - How can we configure HUB NLB to work if one is down the inbound mail is relayed to the other ....how is this configuration acheived???

Do we use the HUB NLB name for this purpose or 2 receive connectors????

Advise Please.

Thank you
Post #: 1
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:07:57 AM   
mark@mvps.org

 

Posts: 3762
Joined: 9.Jun.2004
From: Philadelphia PA
Status: online 		You don't need to NLB for outbound SMTP, the Exchange servers will take care of that for you.
As for the inbound, you should simply implement NLB against SMTP 25 (not 587) in line with the instructions that stem all the way back to Windows 2000 Server. Nothing has changed really.

_____________________________

Mark Arnold (Exchange MVP)
List Moderator

(in reply to madcow)
Post #: 2
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:18:12 AM   
ismail.mohammed

 

Posts: 2333
Joined: 9.May2007
From: India
Status: offline 		hi mate,

Along with Mark Comment i would like to go through this link

http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/load-balancing-exchange-2007-sp1-hub-transport-servers-windows-network-load-balancing-technology-part1.html

http://exchangeserverinfo.com/2008/03/20/network-load-balance-for-hub--cas--exchange-2007.aspx

http://exchange-genie.blogspot.com/2007/07/nlb-and-hub-transport.html

(in reply to madcow)
Post #: 3
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:30:56 AM   
madcow

 

Posts: 895
Joined: 28.May2001
From: Planet, Earth
Status: offline 		Thank you for your response.

Hub NLB for outbound is supported with Exchange 2007 SP1.


Mohammed: If I understand,  Henriks articles Part2 focuses on HUB NLB for inbound relaying  from internal app servers .......???

Here let me try again ...

We send/receive all our mail from Postini ....

lets say if one of our HUB is down how will mail be sent to the second HUB .... ? 

I will have 2 CAS/HUB on same boxes.

I am thinking I will have to create 2 receive connectors ...from Postini ....like Mark said????

(in reply to ismail.mohammed)
Post #: 4
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:41:41 AM   
ismail.mohammed

 

Posts: 2333
Joined: 9.May2007
From: India
Status: offline 		hi mate,

if you have those role in one server
Please configure SAN Certificate for owa or autodiscovery resolution.

For receiving email that fines... all i understand is we need to have one common host entry for those servers.
if you see my article published on Exhcangeserverinfo, it is taking about how to configure NLB for hub & CAS in the same server.

(in reply to madcow)
Post #: 5
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:44:14 AM   
mark@mvps.org

 

Posts: 3762
Joined: 9.Jun.2004
From: Philadelphia PA
Status: online 		HT NLB is, yes, supported but not actually necessary as the mailbox servers load balance themselves between available HTs in-site.

if you look at the EMC properly you'll see that Send Connectors are created at the Organization level and if you add a new HT you don't need to reconfigure the existing Send Connectors. The Receive Connectors are found off the Server Configuration level and differ between servers. So you will indeed need two connectors.

One of the key things with Exchange is to look at where the various configurations are as that will answer most questions before you even have to ask them.


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Mark Arnold (Exchange MVP)
List Moderator

(in reply to madcow)
Post #: 6
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:52:56 AM   
madcow

 

Posts: 895
Joined: 28.May2001
From: Planet, Earth
Status: offline 		Thank you Mohammed for the response ..I printed your article and reading it.

mark ..you are right ....need to closly look at the new ESM2007

(in reply to mark@mvps.org)
Post #: 7
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 10:58:55 AM   
ismail.mohammed

 

Posts: 2333
Joined: 9.May2007
From: India
Status: offline 		hi mark,

you are absolutely right, and fully agree with your concerns which is really important at the time of deploying

(in reply to mark@mvps.org)
Post #: 8
RE: HUB NLB for Internet Inbound Mail - 20.Aug.2008 1:15:29 PM   
madcow

 

Posts: 895
Joined: 28.May2001
From: Planet, Earth
Status: offline 		mohammed I am looking at your article where you create/req the SAN certificate.

I will be requesting a seperate cert for each server ...so I guess I do not need to mention both the server names and -privatekeyexport????

this is how I am thinkings will request for third party CA ....

e.g:

CASHUB1.mycompany.com and CASHUB2.mycompany.com are the machine names ...

Requesting a certificate using the following 

Will request seperate certificate for each box.

"webmail" is our A record in the internent DNS

New-ExchangeCertificate -GenerateRequest -SubjectName "C=CA, O=companyname, CN=webmail.companyname.com"  -DomainName webmail.companyname.com -Path c:\certificates\webmail.companyname.com.req

Is this correct in my scenario?

Advise Please.

< Message edited by madcow -- 20.Aug.2008 2:12:50 PM >

(in reply to ismail.mohammed)
Post #: 9
RE: HUB NLB for Internet Inbound Mail - 22.Aug.2008 5:40:27 PM   
ismail.mohammed

 

Posts: 2333
Joined: 9.May2007
From: India
Status: offline 		hi mate,

my article clearly says that:
both the server are having their own certificate
created one common host name and ip address (NLB)
then i created SAN certificate, what you said earlier.


(in reply to madcow)
Post #: 10
RE: HUB NLB for Internet Inbound Mail - 25.Aug.2008 8:51:15 AM   
madcow

 

Posts: 895
Joined: 28.May2001
From: Planet, Earth
Status: offline 		Thanks mohammed for your response.

By default both servers have their own certificate.

In you example you are using only one certificate for both servers for that you seek a SAN cert.


In my case I dont want to do this ,,,,,,

I want to request one seperate cert from each server .... and send the req to my CA ...so for me to achieve this I dont need a SAN cert.

Advise Please.

Thank you



Advise Please.  Thank you

< Message edited by madcow -- 25.Aug.2008 9:10:09 AM >

(in reply to ismail.mohammed)
Post #: 11

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