Which of the following pictures is correct ?
Should I setup lacp (picture 2) or connect them together like picture 1 for redundancy ?
It depends on how it is configured. Impossible to say by just looking at what is physically connected to what.
I would like to install xcp-ng as hypervisor and also have redundancy in case one of the nodes or one of the switches fails. I haven't done this before. css326 should serve mainly for making the connections with the patch panel and as failover if the crs326 switch would fail.
Is the following plausible to setup or what would you recommended ?