Related: Minisforum MS-01
2.5G ethernet
for 3 nodes with 2x2.5G network you need 6 ports
Mikrotik CRS3108G+2S+IN with 8x2.5G for ~862 PLN should be enough
https://allegro.pl/oferta/switch-mikrotik-net-router-switch-8pport-2-5g-2sfp-crs3108g-2s-in-mikrotik-15684694032
Should leave one pair for 4th node or 2 APs
Overkill, 8/12x10G, ~2800 PLN active cooling
https://mikrotik.com/product/crs312_4c_8xg_rm
https://allegro.pl/oferta/mikrotik-crs312-4c-8xg-rm-switch-12x-rj45-10-gi-16711641564
Overkill, 20x2.5G, ~3900 PLN active cooling
https://mikrotik.com/product/crs326_4c_20g_2q_rm
https://allegro.pl/oferta/przelacznik-routera-chmurowego-mikrotik-crs326-4c-20g-2q-rm-crs326-4c-20g-2q-rm-16773557306
SFP+
Cables
DACs for all ports
https://mikrotik.com/product/xs_da0001
or something cheap
https://allegro.pl/oferta/kabel-dac-10g-sfp-1m-twinax-15331481677 60 PLN
https://www.amazon.pl/Fiber-com-10GBase-CU-bezpo%C5%9Bredni-SFP-H10GB-CU1M-przel%C4%85cznik%C3%B3w/dp/B09P3SC922/257-0226663-7173256 46 PLN
Switch
4x SFP+
https://mikrotik.com/product/crs305_1g_4s_in
I already got one switch of that model so I can use it for 3 ports and 3 ports from mine CCR2116-12G-4S+
8x SFP+ ~1000 PLN, passive cooling
https://mikrotik.com/product/crs309_1g_8s_in
https://allegro.pl/oferta/switch-zarzadzalny-mikrotik-crs309-1g-8s-in-1x1gbe-8x10gbe-sfp-rs232-poe-16062474629
Overkill
16xSFP+ ~2000 PLN, active cooling 1U
https://mikrotik.com/product/crs317_1g_16s_rm
https://allegro.pl/oferta/mikrotik-cloud-router-switch-crs317-1g-16s-rm-13785858868
Thunderbolt
Cables
I bought these two for tests:
https://allegro.pl/oferta/kabel-belkin-usb-typ-c-usb-typ-c-0-8-m-czarny-59d244-16717852066
https://allegro.pl/oferta/kabel-usb-c-szybkie-ladowanie-usb-typ-c-do-apple-thunderbolt-usb-4-0-1m-15524858512
I was also looking at
https://www.x-kom.pl/p/1128794-kabel-thunderbolt-edimax-thunderbolt-3-usb-40-240w.html
https://www.x-kom.pl/p/1128797-kabel-thunderbolt-edimax-thunderbolt-3-usb-40-240w.html
Config
https://old.reddit.com/r/homelab/comments/1ci6wpf/looking_into_setting_up_thunderbolt_ring_network/
https://gist.github.com/scyto/76e94832927a89d977ea989da157e9dc
https://github.com/linucksrox/proxmox-cluster/blob/main/thunderbolt-net.md
https://forum.level1techs.com/t/3-node-65w-proxmox-thunderbolt-network-cluser/200207
https://gist.github.com/thaynes43/6135cdde0b228900d70ab49dfe386f91
https://gist.github.com/scyto/67fdc9a517faefa68f730f82d7fa3570
https://gist.github.com/scyto/4c664734535da122f4ab2951b22b2085
https://gist.github.com/scyto/4c664734535da122f4ab2951b22b2085?permalink_comment_id=5052702
Mesh?
Ceph
https://pve.proxmox.com/wiki/Full_Mesh_Network_for_Ceph_Server
Overkill 25G
https://forum.proxmox.com/threads/ms-01-hci-ha-ceph-sanity-check.142691/
This would need PCIe card like
https://mikrotik.com/product/ccr2004_1g_2xs_pcie