I wouldn't use one nic each. Whether with clustering or replication I personally would advise having a dedicated link for interserver communication, preferably not hooked up to the same switch/hub (a crossover cable is in many ways the ideal). With clustering, losing the server-server link can cause split-mind, where each node thinks it's the owner (depending on the shared disk). With replication, you don't want client-server bandwidth useage to interfere with the replication needs (and vice/versa).
NIC's are cheap enough to make this a nobrainer. > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of Wesley Joyce > Sent: Thursday, March 10, 2005 7:56 AM > To: Exchange Discussions > Subject: RE: Exchange 2003 Clustering or Replication (XOSoft > WANSync Non-HA or HA) > > Nothing fancy you say, your setup makes my setup of using my > existing 100mbit backbone between nodes (with 1 nic each) > sound like a bad idea. :) > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:bounce- > > [EMAIL PROTECTED] On Behalf Of Evan Mann > > Sent: Wednesday, March 09, 2005 2:42 PM > > To: Exchange Discussions > > Subject: RE: Exchange 2003 Clustering or Replication > (XOSoft WANSync > > Non- HA or HA) > > > > Nothing fancy currently. Each server has 2 GigE NICs > teamed for ALB. > > All 4 ports plugged into the same VLAN in a Catalyst 6513 on a GigE > > blade. > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > > Kevinm [DC] > > Sent: Wednesday, March 09, 2005 12:03 PM > > To: Exchange Discussions > > Subject: RE: Exchange 2003 Clustering or Replication > (XOSoft WANSync > > Non-HA or HA) > > > > What are you using for a connection between the double take nodes?? > > > > I have a great T shirt from them. > > > > "Doubletake - when once a night is not enough" > > > > -- Kevinm WLKMMAS Exchange MVP > > HTTP://WWW.WLKMMAS.ORG > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > > Evan Mann > > Sent: Wednesday, March 09, 2005 8:52 AM > > To: Exchange Discussions > > Subject: RE: Exchange 2003 Clustering or Replication > (XOSoft WANSync > > Non-HA or HA) > > > > We opted for replication. I have 2 identical exchange servers with > > externally attached SCSI JBOD's where the stores are kept. The > > logs/OS are kept in 2 internal RAID arrays in the server. > > > > We use Double-Take software with straight replication and failover > > monitoring. With Exchange, thre is a custom app > Double-Take puts out > > that takes cares of all the failover changes. The replication is > > handled by Double-Take itself which is just constantly copying data. > > > > The failover console indicates a full failover would take 20-25 > > seconds (it's always jumping around). We've never tested > it, but read > > many whitepapers and everyone seems to love it. We also > use it for SQL. > > > > I will actually be testing the Exchange failover as I need to > > restructure my RAID arrays on my production server. It will be > > interesting to see how it goes. It's suppoesdly to be > seemless to the > > end user once the failover occurs. > > > > Replication is costly. We have a server and JBOD sitting > pretty much > > idle, just waiting for the chance that the production box > might fail. > > In addition, this type of failover only occurs if the > production box > > becomes unreachable, such as it won't respond to a ping. > I'm not sure > > exactly what Double-Take monitors when doing > replication/failover for > > Exchange. > > > > If I loose the production stores on the JBOD array, > Double-Take won't > > fail over. But since Double-Take is always copying changes, in > > theory, I can swap in the good JBOD and my production server should > > re-mount the stores properly. Again, never tested that either. > > > > Replication gives you no benefits of increased power like a cluster > > could. > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > > Wesley Joyce > > Sent: Wednesday, March 09, 2005 7:58 AM > > To: Exchange Discussions > > Subject: Exchange 2003 Clustering or Replication (XOSoft WANSync > > Non-HA or HA) > > > > I am in the planning phases of an Exchange 2003 deployment. > I would > > like opinions from the list as to what is a more cost effective and > > reliable solution for high availability for Exchange. I am > hoping for > > real world experiences. > > > > 1. Exchange Clustering > > 2. Exchange replication through software (XOSoft WANSync > Non-HA or HA > > for > > example) > > > > In each scenario I would use two nodes, but in the first I > would need > > shared disks correct? My understanding is that in the > second solution > > the nodes just need to be reachable to each other over the network. > > > > Some concerns I have in each scenario is how well those > configuration > > play with anti-virus/spam software as well as Exchange add ins like > > LCS or Sharepoint. > > > > I am hoping for feedback from people real world experiences with > > either or both solutions. Any URLs would be appreciated as well. > > > > Thank you > > > > ________________________________ > > > > Wesley Joyce, Network Administrator > > Network Operations, Information Technology Services > University of the > > Virgin Islands > > #2 John Brewers Bay, St. Thomas, USVI 00802-9990 > > (340) 693-1469 (voice) / (340) 693-1545 (fax) > http://www.uvi.edu/ "If > > you can't explain it simply, then you don't know it well enough. - > > Unknown." > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange > > To subscribe: > http://e-newsletters.internet.com/discussionlists.html/ > > To unsubscribe send a blank email to > > [EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > To unsubscribe via postal mail, please contact us at: > > Jupitermedia Corp. > > Attn: Discussion List Management > > 475 Park Avenue South > > New York, NY 10016 > > > > Please include the email address which you have been contacted with. > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange > > To subscribe: > http://e-newsletters.internet.com/discussionlists.html/ > > To unsubscribe send a blank email to > > [EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > To unsubscribe via postal mail, please contact us at: > > Jupitermedia Corp. > > Attn: Discussion List Management > > 475 Park Avenue South > > New York, NY 10016 > > > > Please include the email address which you have been contacted with. > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange > > To subscribe: > http://e-newsletters.internet.com/discussionlists.html/ > > To unsubscribe send a blank email to > > [EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > To unsubscribe via postal mail, please contact us at: > > Jupitermedia Corp. > > Attn: Discussion List Management > > 475 Park Avenue South > > New York, NY 10016 > > > > Please include the email address which you have been contacted with. > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange > > To subscribe: > http://e-newsletters.internet.com/discussionlists.html/ > > To unsubscribe send a blank email to [EMAIL PROTECTED] > > dl.sparklist.com > > Exchange List admin: [EMAIL PROTECTED] > > To unsubscribe via postal mail, please contact us at: > > Jupitermedia Corp. > > Attn: Discussion List Management > > 475 Park Avenue South > > New York, NY 10016 > > > > Please include the email address which you have been contacted with. > > > > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange > To subscribe: http://e-newsletters.internet.com/discussionlists.html/ > To unsubscribe send a blank email to > [EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > To unsubscribe via postal mail, please contact us at: > Jupitermedia Corp. > Attn: Discussion List Management > 475 Park Avenue South > New York, NY 10016 > > Please include the email address which you have been contacted with. > > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. 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