Hi,
The = (equals) at the end of any Cisco part number indicates that the part can be ordered as a spare part i.e., it doesn't have to be part of a factory built system. From a technical perspective, the N7K-F248XT-25 and N7K-F248XT-25= are exactly the same.
The 25 at the end of the ID for this particular module indicates that it is a Fabric 2 based module, and that five Fabric Modules are required for the device to operate at full line rate. I mentioned how the I/O module names can be interpreted in the forum post Bandwidth distribution in Nexus 7009 Fabric-2 module, but included here also:
The I/O module name is essentially comprised of a number of fields in the format N7K-ABCCDE-FG, where:
- A = I/O module family e.g., M or F
- B = generation of the module e.g., either 1, 2 or 3
- CC = number of ports on the module e.g., 2, 6, 8, 24, 32 or 48
- D = port speed e.g., G=10/100/1000, X=10G, F=40G or C=100G
- E = connector type e.g., T=RJ45, S=SFP, 2=X2, P=SFP+, Q=QSFP or F=CFP
- F = the Fabric ASIC version of the I/O module e.g., either 1 or 2
- G = the number of Fabric modules required for full line rate I/O
Regards
