Hello, We have been working with a vendor to deploy new switches in our primary production datacenter. We are a Dell Force10 shop.
We have a stack of two older Force10 switches connected to a VLT group of two newer 10 Gbps switches via a fiber module that I think Dell said was 40 G. Everything has worked great with that setup.
We are replacing all of those switches with new Force10. Our consultant created a new VLT group of two switches and created a port channel from them to our older Force 10 stack and our newer 10 Gbps Force10 VLT group.
Every time the new switches reboot most of our servers seem to lose connectivity briefly. Our consultant has said there is absolutely no way rebooting our new switches would cause this but it's now happened on two separate occasions.
I am more of a systems guy than networking. I've never connected switches like this and wanted to see what any experts would think with this configuration because Dell seems confused as well.
Here is a rough diagram I made https://imgur.com/lQks9Px
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