Should You Buy 3rd Party SFP+?
What does third party optical module mean in reality? It is optical module not supplied and branded by Your network equipment vendor. However, thing is that even You decide to order “original” optical transceivers, You still will get third party. Why so? – Simply, equipment vendors are subcontracting production of these modules to OEM manufacturers, and selling these models with 10 times and more markup. Are they any different from 3rd party optical modules – answer is No. All optical modules are produced according strict standards of MSA (Multisource Agreement) and only difference is that the vendor ID in the EEPROM is reset to the system vendor’s own.

Why Vendors Doing So?
Most common arguments from vendors would be that 3rd party is gray market counterfeit, then will come quality assurance, meaning that vendors qualified OEM, and in the end will come “Trust us”. This is what vendors will tell You, but real reasons most probably are that 3rd party optical transceivers threaten profits ( In 2006 25% of Cisco’s operating income were from reselling optical modules – more in details here) and that it’s easier to support, if there are limited different variations of optical modules You may use.

What is Legal Policy and Risks?
Here is Link to Cisco’s Guideline: Third Party Components Support. What it says, is that if network fault will be caused by third party optics, then it is your problem, but if these products are not cause of problems, then they still will provide warranty and support services. We have delivered tens of thousands optical modules to our customers and we have to admit that optical modules (we of course can’t guarantee this for other vendors) are very stable piece of equipment. In all experience, we had just few cases module stopping normal functioning during network operating phase. All potential problems with optical modules we discover during network installation phase, and root always is either programming error or production fault.

So, Should You Buy 3rd Party SFP+?
I think that You should decide for yourself, but main arguments we suggest to take in account are:

Price – Our / 3rd party optical equipment is much cheaper then so called “original” ones – sometimes even 10 times. It allows You to save huge capital expenses, buy better quality of equipment, make Your network safer.

Flexibility – In many cases, “original” optical modules offered from vendors are very limited selection – just some basic ones. Often no BiDi / single fiber support, no CWDM or DWDM wavelength support, but actually You can use such modules with any equipment You have perfectly fine.

Contribution for Better Industry – Vendors try to lock in their customers simply because they can. This is nothing new since the beginning of the IT / Computer Industry. We have seen this with cables, connectors, floppy drives, hard drives and many others. In all cases vendors lost their battle in long term just because more and more customers started to use generic items, not vendor OEM’s and vendors just started to ignore trend or reconsidered position and started to support it.
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