Overview of 100G QSFP28 and CFP
With the decline of the price, 100G optical transceivers are becoming more and more popular among customers. The 100G QSFP28 and CPF optical transceiver, as the main transmission medium of the 100G network, dominate the 100G hardware market. Then what are them?
100G QSFP28 Transceiver
100G QSFP28 Vs. CFP: How They Differ From Each Other?
- Power consumption: the power consumption of the QSFP28 transceiver is usually less than 3.5W, while the power consumption of the CFP module is usually 6W to 24W. Therefore, the power consumption of the former is much lower than that of the latter.
- Port density: the first generation 100G transceiver is CFP transceiver, followed by CFP2 and CFP4. As mentioned above, the size of the CFP4 is only 1/4 of the CFP transceiver. But the size of the QSFP28 transceiver is less than CFP4, which means that the latter generation transceiver has a higher port density on the switch.
- Applications: CFP, CFP2 and CFP4 transceiver modules can be used for 40G and 100G Ethernet, while QSFP28 can only be used for 100G Ethernet. However, when used in data centers, enterprise and service provider networks, CFP modules have not yet been widely adopted.
- Cost: experience shows that the price of the CFP module is higher than that of QSFP28 module under the same transmission length. Let’s take the two transceivers of FS as an example: the price of Cisco QSFP-100G-SR4-S compatible 100GBASE-SR4 QSFP28 for 100 meters is just 99 dollars, but that of Cisco CFP-100G-SR10 compatible 100GBASE-SR10 CFP for 150 meters is 1500 dollars.
QSFP28 and CFP have so many advantages, but they are just two of the many solutions of 100G Ethernet. For the specific applications of the data center and server room, specific problems need to be analyzed in detail. But we cannot deny that the two series optical modules have brought new solutions for 100G applications. They will rapidly promote 100G Ethernet development.