Can't form SVL over Cat9500(24Y4c) QSFP ports

[WiLL-I-Am]

Hello,

I can't form SVL over QSFP ports, why?

and they are not QSFP modules, it's part of the chassis.

however, I can form the SVL over SFP+ 10G.

P.S. my command are not being rejected or something, after I put stackwise-virtual link 1 under the qsfp ports and restart, two switch can't see each other, I tried it even with single QSFP, I am under evaluation mode of DNA Adv and Net Adv enabled, but that doesn't mean anything.

[balaji.bandi]

Look at the release notes : (Limitations and Restrictions)

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/16-11/release_notes/ol-16-11-9500.html

[WiLL-I-Am]

I didn't find anything, the interesting thing is, I didn't try to ping over the QSFP ports to see if they're connected before I put on the config

the interface was in default config though, I just added stackwise-virtual link 1 to the interface

another thing that I don't understand is, for any reason if the SVL between two switches severe or not go up, you can't touch the config of either switches, unless you do "no stackwise" and restart the switch, is there any way to bypass this?

what if e.g. you have SVL paired over 4 SFP+ and now you decide to remove the SFP+ and add QSFP instead, you got to go back to standalone restart and form the SVL again?