Cisco Nexus 7000/7700 Line cards fall under 2 categories – M series and F Series. While Nexus starting with M1 Series Line cards which majorly performed all Layer 3 related features and operations, F1-Series Line cards were basically layer 2 cards and used for FEX, Fabric Path, and FCoE etc.
Further drilling into M-Series, we understand that M1 Series were the introductory line cards for Nexus 7k by Cisco. These cards had 10Gig links making them ideal for Distribution layer. With technology development and more demand from customer and IT industry, M1 XL, M2 and lately M3 series have been introduced.
Below table enumerates the major difference between M1, M2 and M3 cards –
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