Powercasting will not work anymore for imaging computers.

Posted on 2006-07-21
Medium Priority
Last Modified: 2010-03-18


I work with a school district and I used to use Powerquest Deploy Center 5.5 to image labs in the school.  I liked it because you just partitioned any machine and created an image that could be powercasted to all the other machines which were booted up from floppy disk.

About a year ago we got some new network equipment and after that, the client machines booting from disk could no longer find the server pc multicasting the image.  I haven't changed anything, so the only thing I could think of is that something changed when the network equipment changed.

Does multicasting need to be enabled on network switches some how?  I'm no expert other than plugging the computers into the switches...

Thanks for any help,

Question by:diablo-26
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LVL 43

Expert Comment

by:Steve Knight
ID: 17157649
Yes multi-casting does need to be enabled.  Is the server you have the images on in the same switch / on the same VLAN or subnet as the clients?

Author Comment

ID: 17157790

I was broadcasting the images from a regular workstation, that's why I liked the software because you don't have to use an actual server.  Any machine with an image on it can function as a server.

For the library which is where I first noticed the problem, each machine is plugged into a floor jack, the floor jack goes back to a wiring closet where there are probably six switches connected via a matrix cable.

I'm betting that multicasting is disabled somewhere cause I can plug them into my own portable switch and they work just fine...  it's just a giant pain unplugging them all from the floor jacks cause the kids kick the jacks and half of them fall back inside themselves when you pull the Cat 5 end out of them.   So I'd much rather just leave them in the floor jacks and get them working that way.  

Thanks for your input dragon...

LVL 43

Accepted Solution

Steve Knight earned 500 total points
ID: 17158908
Check the IP addfresses you get now.  It could be for starters that your 'server' and workstations are now in different vlan's.  Presumably your network support people would be good place to start... lots of big companies do stop multicast or just allow specific uses.  I suppose you could put your own switch in the wiring closet with all the relevant machines on :-)

Author Comment

ID: 17159970

Unfortunately dragon, I am the network support person...hehehee  I'm not dumb, like I've setup the WAN, and I've setup VPN's before... Setup the Sonic Wall... I just have holes in my knowledge here and there.  With switches I've just plugged them in and gone from there.  I don't think we even have a VLAN setup.  We don't even have SNMP enabled... I got SolarWinds and Fluke Network testing software and the one won't even work because it uses SNMP extensively and we don't even have it turned on...

Basically the Middle School and High School pull from the same DHCP Pool. -, something like that...  Then we have two elementaries and they have their own DHCP servers. One is - and the other is -

The good thing is that we have a company coming in this summer with all new switches and a brand new router so I'm going to run this by him and make sure we can do some of these things.  Will be new CISCO router and all new 3COM Switches.

Thanks again for your help,

LVL 43

Expert Comment

by:Steve Knight
ID: 17161415
Well thanks for the points, sorry I couldn't give you a quick fix.


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