is it possible for sg1100 to be in a HA setup?
Yes, I even mention this here
The configurations will be the same as the sg3100?
Yes. You will just need to remember the vlan quirk that the sg-1100 has, but he talks about that in this video as well I think.
Just follow my video about how VLAN’s work on the SG-1100 and then my HA video
What if we have a switch in stack how can we make the HA work?
I covered the switch config in the first video that was posted.
thank you so much we did it on sg1100