06-03-2024 11:51 PM
Can someone once again explain to me the price difference between Cisco and generic SFPs? I had to quote both for a customer and it was $1100 vs. $35 in my currency
06-04-2024 02:12 AM
- Generic SFP's correct functioning can never be guaranteed ; the only guaranteed solution(s) come from
Cisco Optics-to-Device Compatibility Matrix
M.
06-04-2024 03:18 AM
We've been using 3rd party optics for >6 years now. No problems encountered. Aside from prices, here are the reasons why 3rd party optics excel:
1. "First Customer Shipment": This means that 3rd party optics will work on "day 0" when we need it. We do not have to wait for Cisco to release the optics we want 18 months away. That's because 3rd party optics will re-flash the optics to fool the OS.
2. Day 0 software support: We do not need to upgrade the firmware of our switches just to a version compatible with our optics. As long as the switch, router, FW, WLC, etc, can support, for example, GLC-SX-MM/GLC-LH-SM, any 3rd party optics will work.
3. Day 0 software compatibility: Because 3rd party optics are coded differently, they do not have share the inherit "bugs" associated to Cisco-branded optics.
06-04-2024 05:33 AM
Because they can. ; )
In theory, and likely in practice, Cisco optical transceivers are best quality, but $1,000+ better, possibly not. A decision you and your customer need to decide. Don't overlook the support issue using non Cisco components.
06-04-2024 08:39 AM
With a few exceptions (eg, Acacia), Cisco does not manufacture its own optics. Instead, it buys massive amounts of optics from OEMs and re-labels / re-sells them. Does that mean that the 3rd-party optics on the open market are the same as the Cisco optics? No, not necessarily...
Cisco will put out an optics RFP to the reputable optics OEMs (eg, Finisar/II-VI, Avago/Broadcom, Innolight, etc) that can handle Cisco purchase volumes, with RFP technical specs that can be more stringent than those required by the IEEE or the MSA. Cisco will then take samples from down-selected RFP respondents to qualify in their labs. Lab qualification trials very often reveal the need for tweaks to an OEM's product, which most are happy to make, given the potential sales volumes. These Cisco-specific tweaks can bifurcate an OEM's product line if the OEM chooses to continue to sell the untweaked product on the open market. An OEM's contract with Cisco does not prevent the OEM from selling the Cisco-tweaked product on the open market, but the OEM cannot sell it using the exact same product number purchased by Cisco (product number will be slightly modified), nor can they market the tweaked product as "Cisco".
There are also times when a Cisco technical spec can only be met by a fraction of the OEM's production run, with OEM quality-control testing dividing the production "yield" into two buckets: (1) sellable to Cisco and (2) not sellable to Cisco, but still meets IEEE and MSA specs. Note that the not-sellable-to-Cisco bucket can still be sold on the open market as functioning optics. For this reason, and for Cisco-specific product tweaks, an OEM can end up with two products supporting the same IEEE PHY, but they are not functionally identical: one product OEM'ed to Cisco and one product sold on the open market that is not Cisco-qualified. Again, the OEM can sell the Cisco-specific products on the open market, but for economic reasons they may choose not to. The only way to be certain that you are buying Cisco-qualified optics is to purchase Cisco-branded optics through a Cisco-authorized channel.
So what about the enormous price difference between Cisco-branded and 3rd-party optics? A few thoughts on that:
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