Port trunking & stacking

Hi,

I have 2 front switches which are both Dell 6024 and support port trunking and stacking. I stacked them, so they can be viewed now as a single switch.

------------- stack ------------- ! DELL 6024 !-----------------! DELL 6024 !

------------- ------------- | | | | | | | 1 Gb/s | | | 1 Gb/s (trunking: link=2Gb/s between

I want to realize a broadband port trunking between my dell 5324 and the 2 dell 6024. Question are : if one of the link is broken, does the system still work with one aggregate link ? Do I need the spanning tree ? (I think no, because the redundancy is not a ring, but two ports which are aggregated, but I'd like a sure answer).

Thanks in advance for replies.

Best regards,

Julien