RE: IMC fault tolerant method
- From: Rich Tibbets <rtibbets@xxxxxxxxxxxxxxxx>
- To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
- Date: Thu, 21 Aug 2003 10:17:15 -0400
Neil,
Thanks for the suggestions.
Regards
Rich
-----Original Message-----
From: Neil Hobson [mailto:Neil.Hobson@xxxxxxxxxxxxxxxxx]
Sent: Thursday, August 21, 2003 4:37 AM
To: [ExchangeList]
Subject: [exchangelist] RE: IMC fault tolerant method
http://www.MSExchange.org/
The IMC is rubbish for this. It's an EDK gateway and not a true connector;
as a result, the MTA always sees the IMC as 'up' or 'available', and will
continue to route messages to it even if the service is down. Worse still,
once the MTA has put the messages into the queue, no re-routing will take
place - the MTA considers its job done.
The options I can think of:
1. Implement a cluster for the IMC on a dedicated bridgehead server. We've
done this for some customers, and it does work well. But it does add cost,
complexity, etc, to the environment.
2. Implement a warm standby server for your IMC server, which covers for the
failure of the system backplane, etc.
3. Upgrade to Exchange 2000, and use the SMTP service there, which includes
superior link state checking, etc.
HTH,
Neil
_____
From: Rich Tibbets [mailto:rtibbets@xxxxxxxxxxxxxxxx]
Sent: 19 August 2003 18:14
To: [ExchangeList]
http://www.MSExchange.org/
Hi all,
I have a single site organization consisting of five exchange 5.5 SP4
servers. Two of the server has IMC Connectors. What I am trying to do is
have fail over in the event that one of the IMC circuits goes dead. The
setup on the address space currently is server1 cost:1, server two cost:10.
I have a couple questions:
1. Is their anyway to automate this so traffic can be routed automatically
when there is a circuit failure?
2. Is their any procedure to re-route email already sitting in the queue.
I have read that even with a circuit going dead the IMC is still accepting
traffic and will be queued until it can deliver the messages or reach its
time out value.
I did search for an answer and found references to how the IMC functions but
no clear answers on clearing the queue or for a better way of setting up the
site.
Thanks for any help on this.
Rich Tibbets, MCSE
Network Administrator
National Corporate Research
Phone:302.734.1450
Mobil: 302.670.5688
Fax: 212.564.6083
<mailto:rtibbets@xxxxxxxxxxxxxxxx> rtibbets@xxxxxxxxxxxxxxxx
National <http://www.nationalcorp.com/> Corporate Research, LTD
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