I've read through the datasheets of each and I cannot find anything on support for "inter-class stacking". To be specific I am building a core stack and I am planning on using 2x 9300-24UX and 2x C9500-24Y4C. Ideally I would want the core to be a single stack.
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Yeah I see now they use different stack technologies. The thing is I need copper interfaces and I cannot seem to find anything in 9500 series. Ideally 2x24 port switches.
If you need copper and fiber, then why not look at Catalyst 9400 and use StackWise Virtual to create a single core entity?
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I actually consume 24 copper and 27 optics.
So I planned for 2x 24 copper ports. Preferrably MGig for "investment protection". And 2x24 optical ports preferably with 10/25G support again for future proofing.
Currently the most homogeneous build is to use 3850 stack
2x 3850-24XU-L - 24x MGig with Network Module 8x 10G SFP+
2x 3850-12XS-S - 12x 10G SFP+
I am also considering 9300/9500 build
2x 9300-24UX 24x Multigigabit Cisco UPOE (100M, 1G, 2.5G, 5G, or 10 Gbps) no uplink module
2x C9500-24Y4C 24x 1/10/25G Gigabit Ethernet + 4x 40/100G Uplink (fixed uplink)
Total GPL is basically the same. The only thing that "bothers" me with 9000 series is that they are not stackable. On the other hand 9000 series build offers very high throughput optics uplink, higher speed optics (25G) and more optic ports.
9400 is not an option since price is so much bigger.
I picked 2x C9500-24Y4C (24x 1/10/25G Gigabit Ethernet + 4x 40/100G Uplink). The switches will be in the same rack. Looking at the StackWise Virtual guide it says "The stack can be formed over a redundant 40-G or 10-G fiber links...". I was thinking of using 100G (QSFP-100G-CU1M) for SVL. I assume SVL can be configured on any interface including 100G. Can someone confirm this?
I finally found some info on this here: https://www.cisco.com/c/dam/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.pdf
I see that 100G are supported for my 9500-24Y4C on fixed uplinks.