Cisco F0C19471N42 enterprise networking (router/Catalyst switch/UCS families) Switch / Carrier Ethernet Line Card

The Cisco F0C19471N42 is a Cisco Catalyst 2960-S FlexStack Stack Module (the identifier is the unit’s Cisco serial number rather than its product ID, which is C2960S-STACK/C2960S-F-STACK). FlexStack is Cisco’s stacking technology for the Catalyst 2960-S family, letting up to four 2960-S switches with LAN Base software be joined into a single logical switch via a hot-swappable stack module fitted to each unit; two switches connected this way share a full-duplex 10Gbps stacking link, and each member supports two such links for up to 20Gbps of aggregate stack bandwidth. Fitting a FlexStack module to a standalone 2960-S switch is what enables stacking in the first place; without it the switch can only operate independently. The Catalyst 2960-S range was a common fixed-configuration access-layer switch for campus and branch deployments, and FlexStack modules remain a routine spare for sites expanding or maintaining an existing 2960-S stack. Tech-Star (UK-based, shipped worldwide) supplies Cisco stacking modules for ongoing switch estate maintenance.