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Workstation fails to boot on SAN using Vixel 2100 switch.

Posted on 2005-03-21
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I have just completed integration of a SAN using a 1Gb Vixel 2100 switch.  The system consists of  three JBOD's all directly connected to the switch via copper GBIC's.  For the last week, two workstations (one Win 2K and one Win XP PRO)  have been successfully simultaneously accessing the storage by using Rorke Data's ImageSAN software.  Sunday evening, I added the third and final workstation (Win 2K) to the network .  I brought it up by itself and it works perfectly.  PROBLEM:  If the final workstation is running, neither of the original two will boot.  Also, if either or both of the original two are running the third and final will hang on booting.  Does this sound like a "propigated lip" related problem?  (I have no idea what that is.)  In sevral different installations over recent years I have run successfully with TWO hosts.  This is the first time I have tried to add a simultaneous third host to the switch.  BTW, all hosts are connected to the switch via 1Gb OPTICAL HBA's.  Thanks for the help.
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Question by:byrneb
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by:byrneb
ID: 13598804
CORRECTION UPDATE:
Further investigation shows that the problem is a boot level conflict between only two of the workstations, lets call them #1 and #2.  If you start #1 it boots fine, sees all storage, and works fine while #3 is also running.  If you then attempt to add in #2, #2 hangs while attempting to boot.  WHILE #2 is hung, if you shut down #1, #2 finishes booting successfully.  Opposite scenario is also true: with #3 running and both #1 and #2 off, you can successfully boot and run #2 but if you attempt to add in #1, #1 hangs during boot.  While #1 is hung, if you shut down #2, #1 will finish booting.  Problem seems to be fibre switch conflict related?  There are no IP conflicts.  I examined the settings within the Vixel 2100 and found no apparent conflicts: all in Zone 1, etc.  I'm stumped.
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bcotta earned 2000 total points
ID: 13685716
I have ran into a similiar problem with a couple of SC fibre switches from EMC.  You may have to specifiy a specific ratio between server connections and trunk connections to the SAN.  Therefore, when a third server is booting, it may be trying to access the trunk line(s) but the switch is not permitting more than two hosts.  I am not as familiar with Vixel, but EMC switches are very picky about that.  Also, dependent upon how involved the Vixel 2100 is, you may need to add the third host to the particular fibre fabric setup for the original two hosts.  I hope this helps.

Brian
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