In order to meet the ever-growing need for dense 10 and 40 Gigabit Ethernet switching, Arista launches the 7250X Series switches to support a flexible combination of 10G and 40G in a compact form factor to accommodate both east-west traffic patterns and support the requirement for low latency and power efficiency in dense servers farms. Among the 7250X Series, the Arista 7250QX-64 switch has been highly favored by many Ethernet users due to its low latency, high power efficiency and high performance. The detailed information about the Arista 7250QX-64 switch and its compatible optics will be mainly covered in the following passage.
The Arista 7250QX-64 combines low latency, and a shared packet buffer pool of 12MB per group of ports that is allocated dynamically to ports that are congested. With 64 QSFP+ ports the 7250QX-64 is a dense 40GbE or 256 × 10GbE of wire speed performance in a 2RU system. Here are some highlights of this switch:
- Built-in storage.
- Resilient control plane.
- Cloud networking ready.
- Data center optimized design.
The above figure shows Arista 7250QX-64 switch’s 64 QSFP+ ports supporting 64 × 40GbE or 256 × 10GbE.
The Arista 7250QX-64 supports a full rang of 10 and 40 Gigabit Ethernet connectivity options. Those 10G/40G ports support installation of SFP+ and QSFP+ modules.
From the above statement, we are clear that the Arista 7250QX-64 switch has 64 QSFP+ ports, so you can directly connect “transceivers” on the two ends of the DAC cables to the corresponding port on the switch. For transmission distance over short distance, you can choose 40G QSFP+ DAC cables to make network connectivity. By using 40G breakout cable, you can just plug the one end of 40G QSFP+ copper direct attach cable into the 40G QSFP+ ports and plug the other ends of the DAC cable into four 10G SFP+ ports. Besides, you can also connect the two ends of 40G QSFP+ DAC cable with the 40G QSFP+ ports directly to make connectivity on the Arista 7250QX-64 switch. When the transmission distance is longer, 40G QSFP+ AOC cable is a good option to transfer data. Like the 40G QSFP+ DAC cable, you can plug the two ends of 40G QSFP+ AOC cable into the QSFP+ ports on the Arista 7250QX-64 switch. Those 40G QSFP+ DAC and AOC cables are suitable for short distance and ideal for high cost-effective connectivity to your Arista 7250QX-64 switch.
As we can see from the above figure, there are many 40G QSFP+ modules available to the Arista 7250QX-64 switch. By using 40GBASE-SR4 QSFP+ transceiver, the maximum distance can be up to 40 km via single-mode fiber on the switch. Through 40GBASE-XSR4 QSFP+ module, link lengths on 7250QX-64 switch can arrive 300 m and 400 m, respectively, on laser-optimized OM3 and OM4 multimode fibers.
The Arista 7250QX-64 is designed for high availability, low latency and high power efficiency, which provides a better solution for 10G/40G Ethernet network connectivity.