General Knoppix support for those who've read the FAQ at the Wiki
Cisco Catalyst C9300-24UX-A 24 Port 10G/mGig UPOE Network Switch + NM-8X Module
$579.97
Dell PowerConnect 6224 Rackmount 24-Port Gigabit Managed Ethernet Network Switch
$42.50
HP ProCurve 2810-24G 24-Port Gigabit Ethernet Network Managed Switch J9021A
$39.99
TP-Link 24-Port Gigabit Ethernet Unmanaged Switch Desktop/Rackmount TL-SG1024D
$59.49
Cisco SG300-52-Port Gigabit Managed Rack Mountable Network Switch
$44.95
NETGEAR GS108 ProSafe 8-Port GbE Unmanaged Switch w/ Power Adapter
$14.99
TP-Link TL-SG108 8-Port 10/100/1000 Mbps Gigabit Ethernet Desktop Switch FREE SH
$14.99
HP JG937A Flexnetwork 5130-48G PoE+ 48-Port Gigabit Network Switch
$56.99
Cisco SG300-52 52-Port Gigabit PoE+ Switch *Tested For Power & Factory Reset*
$69.99
Loocam Gigabit PoE Switch 8 Port 96W 2 Uplink Port Unmanaged Ethernet Switch
$49.99