all of the Cisco switches that have a GBIC or SFP ports are suitable for these implementation, the decision on which switch depends on your budget and port density you want. The GBIC or SFP you will need based on the distance between switches (600 M) will need to be at least an LX/LH with fiber type as SMF as this combo have distance capabilities of 10 km. Anything less such as SX/LX/LH with cable type MMF have a ceiling distance of 550 M.
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