Arista QSFP-40G-PLRL4-Arista | 40G QSFP+ Transceiver, Single-Mode, 1310nm, 1km, MPO

Q: What is the difference between QSFP-40G-PLRL4 and 40GBASE-LR4?
A: The QSFP-40G-PLRL4 uses parallel single-mode fiber with an MPO connector and four separate 1310nm wavelengths, making it suitable for 40G to 4x10G breakout applications. In contrast, 40GBASE-LR4 uses CWDM wavelengths over duplex LC fiber up to 10 km and cannot be easily split into 4x10G connections.

Q: Can this transceiver be used for 4x10G breakout connections?
A: Yes, the QSFP-40G-PLRL4 supports 4x10G breakout mode using appropriate MPO to LC breakout cables, similar to 40GBASE-SR4. This makes it ideal for connecting a 40G QSFP+ port to four separate 10G single-mode devices.

Q: What type of fiber cable is required?
A: This transceiver requires an MPO/MTP-12 single-mode fiber cable, typically with 8 active fibers arranged in a parallel configuration. Standard data center MPO trunk cables are compatible.

Q: Is this transceiver compatible with Arista switches?
A: Yes, compatible versions of the QSFP-40G-PLRL4 are programmed to work seamlessly with Arista 40G-capable switches and routers. Always verify compatibility with your specific platform and EOS version.

Q: What applications is this transceiver best suited for?
A: The QSFP-40G-PLRL4 is ideal for short to medium reach single-mode applications within data centers, including server-to-switch connections, inter-rack links, and intra-building campus networks where 1 km reach is sufficient.