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Hi Mak,You can find the difference here.http://www.cisco.com/en/US/products/hw/ ... Rgds,Vijay V
The main difference is that WS-X6548-GE-TX is a fabric enabled card while WS-X6148-GE-TX is not. The WS-X6148-GE-TX supports the "classic" 32 Gbps backplane. The higher-performance WS-X6548-GE-TX supports the 256 Gbps (CEF256) switch fabric module (SFM/SFM-2) for premier wiring closet configurations