System Administrator

I have 2 switches I need to add in existing environment as replacement to old switches. One is Force10 s25 and it is going to be top level switch. Other below that is Dell PowerConnect 7048P.  Top level (force10) will be plugged into layer 3 switch.
Currently we have this setup but I am replacing old Dell 52xx switches. We have 5 vlans configured as well.
As soon as I turn vlan on 7048 traffic is not going thru. I contacted Dell and they confirmed that I need same config on my Force10. Now Force10 is configured as trunk, pass thru traffic on all ports. As I said this worked but as soon as I introduce vlan on 7048P it doesn't work.  Then I wiped the config on force10 and started from beginning. I google it and some say I need to put all prots in hybrid mode. I did that as well, but now not even regular traffic is going thru. What I am struggling with is to make every port on Force10 aware of vlans (member of multiple vlans). I read that that needs to be done in order for Force10 to pass traffic when you introduce vlan on 7048P. When I make multiple vlans, I then assign to ports, but for some reason when I try to assign a second vlan the error conmes up that says the port is already a member of a vlan. Can this be done at all or I am missing something?
I am on the right track on achieving this properly or? Please help. As needed I can upload the config from my both switches. I kind of know that all switches need to be aware of all vlan's, however, I am struggling with Force10. Not sure how to properly configure it so it will pass traffic from all 5 vlans on all ports. Also does port 23 and 24 on Force10 needs to be configured diffrenetly than other 22 ports as 24 port is uplinked to layer 3 switch and 23 to 7048P.  All documentation I found on internet, nothing works for me.
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Any trunk ports need to be set to tagged.  Access ports need to be set to untagged, and have a VLAN assigned.
MRSAuthor Commented:
But when I try to assign more than one vlan to any single port it's giving me the error that port is already a member of a vlan XXX.
The VLAN you assign to a trunk (tagged) port is only going to apply to untagged traffic on that port.
MRSAuthor Commented:
But they do have to be in hybrid mode on Force10 all of them including 23 and 24 correct?
I haven't used Force10 switches, but the other brands I've used allow the selection of either "tagged/untagged" or "trunk/access".

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