SG350-28-K9; SG500-52-K9; SG550X-24MP-K9; CBS350-24P-4G; SG550X-48 stack. Tested on Python versions:.Cisco SG500-28 28-port Gigabit Stackable Managed Switch. Manufacturer SKU : SG500-28-K9-BR. Regional Specifc Power Cord Adapter : Brazil. Cisco SG500-28 Ethernet Switch. Features 24 networking ports to meet the requirements of the most demanding workgroups; Supports cost-efficient twisted pair Hi all, We have a new SG500-28p set to layer 3, and are having issues routing traffic between VLANs. Our network design for this switch is very simple. Here is With Layer 3 switching support, the SG500-28MPP-K9-NA 28-Port Gigabit Ethernet PoE+ Managed Switch from Cisco is designed to handle business applications