Exchange 2007: Failover for each role of Exchange - Bharat Suneja [MVP] |
Friday, June 15, 2007 11:48 AM
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- Mailbox: Clustered Mailbox Server (CMS) - either SCC or CCR, failovers
automatically.
- Hub Transport: If you have more than one Hubs, they load-balance
automaticlly. No action required.
- Edge: If Edge servers receive inbound internet mail (are targets of MX
records) - this can be done either using multiple MX records, or using
network load balancing (MX points to A recort that maps to the virtual ipo
address), for outbound mail: Send Connectors can have multiple source
servers (like Bridgeheads on SMTP and Routing Group connectors in Exchange
2003).
- CAS: Network load balancing
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
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Exchange 2007: Failover for each role of Exchange - doudoune |
Friday, June 15, 2007 12:00 PM
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Thankk for your answer:
If i do the failover, can i combine some roles ?
Thanks, |
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Not sure what you mean - the Clustered Mailbox Server role, which is the only - Bharat Suneja [MVP] |
Friday, June 15, 2007 4:11 PM
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Not sure what you mean - the Clustered Mailbox Server role, which is the
only role that can really "failover" in terms of the CMS (aka "EVS") being
moved to the passive node, cannot co-exist with any other server role.
Besides the CMS role, the Edge Transport server role is the only one that
can't co-exist with other server roles.
The Hub Transport, CAS and UM roles can co-exist.
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
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You can NLB CAS & HUB buddy! For the best redundancy (nice English eh? - Rodney R. Fournier [MVP] |
Monday, June 18, 2007 11:43 AM
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You can NLB CAS & HUB buddy! For the best redundancy (nice English eh?) put
more than one HUB per AD site.
Cheers,
Rodney R. Fournier
MVP - Windows Server - Clustering
http://www.nw-america.com - Clustering Website
http://msmvps.com/clustering - Blog
http://www.clusterhelp.com - Cluster Training
ClusterHelp.com is a Microsoft Certified Gold Partner |
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Exchange 2007: Failover for each role of Exchange - Russ Kaufmann [MVP] |
Monday, June 18, 2007 12:36 PM
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There must be a typo there, as you can not NLB hub.
--
Russ Kaufmann
MVP - Windows Server - Clustering
ClusterHelp.com, a Microsoft Certified Gold Partner
Web http://www.clusterhelp.com
Blog http://msmvps.com/clusterhelp
The next ClusterHelp classes are:
July 10-13 in Denver
July 16-19 in New York |
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2 roles can be NLBed with Exchange Server 2007, CAS & Edge, like I said or - Rodney R. Fournier [MVP] |
Monday, June 18, 2007 12:43 PM
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2 roles can be NLBed with Exchange Server 2007, CAS & Edge, like I said or
meant to say :)
Cheers,
Rodney R. Fournier
MVP - Windows Server - Clustering
http://www.nw-america.com - Clustering Website
http://msmvps.com/clustering - Blog
http://www.clusterhelp.com - Cluster Training
ClusterHelp.com is a Microsoft Certified Gold Partner |
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You cannot NLB Edge or Hub. - Scott Schnoll [MSFT] |
Tuesday, June 19, 2007 12:52 PM
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You cannot NLB Edge or Hub. And you cannot install Edge on the same server
as CAS. |
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Wait, I know I read 2 roles can be NLBed. So its CAS & UM then? - Rodney R. Fournier [MVP] |
Tuesday, June 19, 2007 1:00 PM
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Wait, I know I read 2 roles can be NLBed. So its CAS & UM then? I hate
getting older and mis-remembering things, plus I may never touch a UM
server - ever.
Cheers,
Rodney R. Fournier
MVP - Windows Server - Clustering
http://www.nw-america.com - Clustering Website
http://msmvps.com/clustering - Blog
http://www.clusterhelp.com - Cluster Training
ClusterHelp.com is a Microsoft Certified Gold Partner |
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NLB is for CAS only. - Scott Schnoll [MSFT] |
Tuesday, June 19, 2007 1:17 PM
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NLB is for CAS only. In SP1, we'll introduce the ability to use NLB on Hub
for client connectors only.
For Mbx, you use failover clusters.
For Edge, you use multiple computers and multiple MX records.
For UM, you use multiple computers configured to route calls in a round
robin fashion.
For Hub, you use muttiple computers, and resiliency is built in. |
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Exchange 2007: Failover for each role of Exchange - Russ Kaufmann [MVP] |
Tuesday, June 19, 2007 6:03 PM
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Interesting. I have NLB'ed Edge and it works fine as the second server has
the cloned rules of the first. Neither belongs to AD, neither has any
connection to the other.
I have used NLB, but that doesn't mean it is supported (although I swear
earlier documentation did say it was).
I guess, if you think about it, the outside coming in piece using DNS round
robin will work as if one server fails, SMTP and the way it uses MX records
will get the email to the other server. However, going from the inside out,
the Hub needs to talk to the Edge. If one edge is not available per the
subscription, it should try the other.
--
Russ Kaufmann
MVP - Windows Server - Clustering
ClusterHelp.com, a Microsoft Certified Gold Partner
Web http://www.clusterhelp.com
Blog http://msmvps.com/clusterhelp
The next ClusterHelp classes are:
July 10-13 in Denver
July 16-19 in New York |
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for client connectors only.Isn't NLB at the network layer? - Bharat Suneja [MVP] |
Wednesday, June 20, 2007 10:44 AM
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for client connectors only.
Isn't NLB at the network layer? If you use NLB for Edge boxes or IIS SMTP
svc or Postfix for that matter - does NLB care? Does Exchange know or find
out it's being NLBed and stop working?
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
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Agreed, but what I think Scott is refereeing to is testing and - Rodney R. Fournier [MVP] |
Wednesday, June 20, 2007 10:51 AM
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Agreed, but what I think Scott is refereeing to is Microsoft testing and
official support. You can use NLB on an Edge server, works great, but will
Microsoft support it?
Cheers,
Rodney R. Fournier
MVP - Windows Server - Clustering
http://www.nw-america.com - Clustering Website
http://msmvps.com/clustering - Blog
http://www.clusterhelp.com - Cluster Training
ClusterHelp.com is a Microsoft Certified Gold Partner |
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Exchange 2007: Failover for each role of Exchange - Russ Kaufmann [MVP] |
Wednesday, June 20, 2007 1:01 PM
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The issue as far as I understand it as far as Hubs go is that they use self
signed certificates, and that with multiple hubs and multiple certs but yet
sharing the same MAC and IP that some pretty funky (you might need to look
up this highly technical term) things happen, especially from what I have
seen when it comes to the transport dumpster and replays of transactions.
However, Scott might be able to add more or different reasoning.
--
Russ Kaufmann
MVP - Windows Server - Clustering
ClusterHelp.com, a Microsoft Certified Gold Partner
Web http://www.clusterhelp.com
Blog http://msmvps.com/clusterhelp
The next ClusterHelp classes are:
July 10-13 in Denver
July 16-19 in New York |
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It's not about what works. It's about what is tested, and what is supported. - Scott Schnoll [MSFT] |
Wednesday, June 20, 2007 1:08 PM
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it is not about what works. it is about what is tested, and what is
supported. :-) |
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My question was more regarding Edge boxes - I know Hubs have built-in - Bharat Suneja [MVP] |
Wednesday, June 20, 2007 1:09 PM
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My question was more regarding Edge boxes - I know Hubs have built-in
load-balancing.
Also, in support of what Scott said - one should be able to virtualize the
client connector's fqdn/ip so remote POP3/IMAP clients don't need to know
about different Hubs in case of failure.
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
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