Being in the market for computer hardware parts, I have been trying to compare two Cisco products, which may seem quite similar at first glance to anyone, but at the same time the newer one (how else might one think about?) has a lot of additional features.
For instance the Cisco WS-X4516-10GE Catalyst 4500 series supervisor engine V-10GE has the same layer 2-4 switching. Then the previously released 4500 series supervisor engines, but of course, in addition there's wire-speed 10-Gigabit ethernet uplinks, 136-Gbps capacity and 102-mpps throughput, to enhance resilient control of converged data. This piece enables business resiliency for enterprises and metropolitan ethernet customers. After having invested a lot of time and also done a lot research on the matter, I found out the following.
The Cisco WS-X4516-10GE is a supervisor engine with a 800 MHz speed processor and 512 SDRAM, while there is the much cheaper
WS-X4515 that has the same SDRAM amount, but it's processor is running only at 333 MHz. They both use ethernet, fast ethernet, and gigabit ethernet as data link protocols.
The WS-X4516-10GE has more network/transport protocols, routing protocols, authentication methods, compliance standards. While both devices have expansion slots for compact flash cards, the WS-X4516-10GE can also handle GBIC's, and mini-GBIC's. Altogether, the WS-X4516-10GE has much more features, and that is the reason it's used price is around 50% more than that of the WS-X4515.
And who doesn't like to save some extra money in this economy? Another concern of mine is the environment as well. If I can purchase the same product refurbished AND save money, why not? I have purchased a lot refurbished computer parts in the past and I have never encountered any problems nor have I seen a difference in performance.
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