Cisco FlexStack-Plus provides stacking of up to eight Cisco Catalyst 2960-X or 2960-XR Series Switches with the optional FlexStack-Plus module (Figure 5).
The FlexStack-Plus module is hot swappable and can be added to any Cisco Catalyst 2960-X or 2960-XR Series Switch with a FlexStack-Plus slot. Switches connected to a stack will automatically upgrade to the stack’s Cisco IOS Software version and transparently join the stack without additional intervention.
To provide investment protection, FlexStack-Plus is backward compatible with FlexStack. Cisco Catalyst 2960-X LAN Base switches equipped with a FlexStack-Plus module can be stacked with Cisco Catalyst 2960-S and 2960-SF LAN Base switches equipped with a FlexStack module (see Table 6). Table 7 lists the scalability and performance of FlexStack with the various software images.
FlexStack and FlexStack-Plus supported combinations
| Stack member | 2960-XR IP Lite | 2960-X LAN Base | 2960-S/SF LAN Base | 
| 2960-XR IP Lite | Yes | – | – | 
| 2960-X LAN Base | – | Yes | Yes | 
| 2960-S or 2960-SF LAN Base | – | Yes | Yes | 
 
FlexStack-Plus scalability and performance
| Stack member | Stack bandwidth | Stack limit | Cisco IOS feature set | 
| 2960-XR IP Lite | 80 Gbps | 8 | IP Lite | 
| 2960-X LAN Base | 80 Gbps | 8 | LAN Base | 
| 2960-X LAN Base mixed with2960-S/SF LAN Base
 | 40 Gbps | 4 | LAN Base | 
 
Cisco FlexStack-Plus switch stack
