Solved

Exchange 2003 Failover based on multiple Smarthosts.

Posted on 2009-04-15
7
809 Views
Last Modified: 2013-11-30
Hi guys,

We are planning to use multiple smarthosts for failover purpose, so if one is unavailable Exchange route the messages to other one.
Following is details our of messaging infrastructure:
a) Only one Exchange 2003 server, single bridgehead and routing group.
b) Smarthost - 1
c) Single SMTP connector on Exchange with 'cost' value 1.

What would be the best possible solution, so Exchange do  the automatic failover to smarthost?

If we use single SMTP connector with 2 smarthosts entries seperated by semicolon (;) would it do failover or load balancing?

Is there any difference in using Semicolon (;) or Comma (,) to seperate multiple smarthost on single SMTP connector?

Thanks in advance,





 

0
Comment
Question by:fsaiexpert
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 65

Expert Comment

by:Mestha
ID: 24151016
Exchange doesn't do failover on smart hosts. The most that you can is load balancing, where all servers are listed in the SMTP connector and Exchange will use them all. Obviously if one isn't available then it will use another one.

Simon.
0
 

Author Comment

by:fsaiexpert
ID: 24155611
What options are open to us then to do failover with Exchange?
We currently have a smarthost configured on the Internet Mail Connector.
We thought we could add in another smarthost with a semi-colon identifying failover:
example:
[192.11.1.1];[192.11.1.2]

should 1 not be available it will route to 2 exclusively.
your advice would be appreciated
0
 
LVL 65

Expert Comment

by:Mestha
ID: 24157041
That is the only option available to you, but it will be load balancing, not failover. Exchange will attempt to use both servers.
If the first server is not available then it should use the second, but that will not stop it from trying to use the first.

Simon.
0
Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

 

Author Comment

by:fsaiexpert
ID: 24157412
Would I be correct in suggesting that this may alternatively work and provide redundancy:

http://support.microsoft.com/kb/257426

Therefore:
[IP1],[IP2] = load balancing
[IP1],fqdn = HA

1 IP 1 fqdn in the connector [ip1],fqdn this will go to IP1 until there is a failure with it, then it will continue to send there until IP1 becomes available (and for a little while afterwards).
0
 
LVL 65

Expert Comment

by:Mestha
ID: 24158243
The article that you have posted isn't clear whether it will provide HA or not, it just states that it doesn't load balance. It may well be that Exchange will just ignore the second FQDN host when the first is referenced by IP address.

Simon.
0
 

Author Comment

by:fsaiexpert
ID: 24158661
Thanks Simon,

In your experience have you ever seen the confi guration via the SMTP Connector Smarthost

[IP1],fqdn = HA

working for redundancy with Exchange?
0
 
LVL 65

Accepted Solution

by:
Mestha earned 500 total points
ID: 24160057
I haven't done that myself.
I have done two hosts before for load balancing, but that is all.

Something else that I have done before is where the load balancing isn't done by Exchange, but by something else and Exchange is just pointed at a single location.
Another option is round robin DNS, but again that isn't HA, but load balancing.

Simon.
0

Featured Post

MIM Survival Guide for Service Desk Managers

Major incidents can send mastered service desk processes into disorder. Systems and tools produce the data needed to resolve these incidents, but your challenge is getting that information to the right people fast. Check out the Survival Guide and begin bringing order to chaos.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

When you’re making plans to join the modern business race, you should analyze various details that may affect your results. Nowadays, millions of businesses are trying to grow into established and appreciated professional enterprises.
In-place Upgrading Dirsync to Azure AD Connect
The viewer will learn how to successfully download and install the SARDU utility on Windows 7, without downloading adware.
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question