Tag Archives: Arista 7250QX-64

How to Connect Optics for Arista 7250QX-64 Switch

In the previous post “Compatible Optics for Arista-7250QX-64“, we are clear that the features and compatible direct attach cables and optical modules of the Arista 7250QX-64 switch. But how to make the right connection? Is there anything to notice before and in the process of installation? This article would provide a satisfying solution for you.

Connecting a QSFP+ DAC Cable to Arista 7250QX-64

The proper connectivity procedures and some installation notes are very essential for connection between DAC cable and the switch. The detailed information are just below.

The connectivity steps:

1. If the QSFP+ DAC cable connector is covered with a rubber safety cap, remove the cap. Save the cap.
2. Check the port on the switch and make sure the right connectivity. If you choose 40G QSFP+ to QSFP+ DAC cable for connectivity, please make sure that is a 40G port.
3. Insert the cable connector into the switch port.

DAC cable to switch-connection

Figure1: Connecting a DAC cable to a switch

4. Secure the cables so that they do not support their own weight. Place excess cable out of the way in a neatly coiled loop. Placing fasteners on a loop helps cables maintain their shape.

Warnings and Cautions

1. Before you begin connecting the QSFP+ DAC cables to the switch, ensure that you have taken the necessary precautions for safe handling of lasers.
2. Do not bend the QSFP+ DAC cables beyond their minimum bend radius. An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose.
3. Do not let the DAC cables hang free from the connector.
4. Do not allow fastened loops of cables to dangle, which stress the cables at the fastening point.

Installing a QSFP+ transceiver in Arista 7250QX-64

There are many QSFP+ transceiver types supporting Arista 7250QX-64, including QSFP-40G-SR4, QSFP-40G-XSR4, QSFP-40G-PLRL4, QSFP-40G-LRL4, QSFP-40G-PLR4, QSFP-40G-LR4, and QSFP-40G-ER4. Before you begin installing one QSFP+ transceiver in an Arista 7250QX-64 switch, ensure that you have a rubber safety cap available to cover the transceiver. And to prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the ends the transceiver. Figure 2 shows how to install a QSFP+ transceiver.

Optical transceiver-switch connection

Figure 2: installing a QSFP+ transceiver in a switch

Installation steps:

1. Remove the transceiver from its bag.
2. Check to see whether the transceiver is covered with a rubber safety cap. If it is not, cover the transceiver with a rubber safety cap.
Warning: Do not leave a QSFP+ transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light.
3. If the port in which you want to install the transceiver is covered with a dust cover, remove the dust cover and save it in case you need to cover the port later. If you are hot-swapping a transceiver, wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver.
4. Using both hands, carefully place the transceiver in the empty port. The connectors must face the switch chassis.
Caution: Before you slide the transceiver into the port, ensure that the transceiver us aligned correctly. Misalignment might cause the pins to bend, making the transceiver unusable.
5. Slide the transceiver in gently until it is fully seated.
6. Remove the rubber safety cap when you are ready to connect the cable to the transceiver.

Summary

From the above passage, we may observe that it is not difficult to connect QSFP+ DAC cables or QSFP+ transceiver to the Arista 7250QX-64 switch. Whether you are using DAC cables or QSFP+ transceivers to make connectivity, please remember that do not look directly into a optical transceiver or into the ends of the DAC cables, the laser light may damage your eyes. FS.COM offers large and in-stock Arista 40G QSFP+ DAC cables as well as 40G QSFP+ optical transceivers. If you need any of our products, please feel free to contact us.

Compatible Optics for Arista 7250QX-64

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.

Features of Arista 7250QX-64

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.

Arista 7250QX-64

The above figure shows Arista 7250QX-64 switch’s 64 QSFP+ ports supporting 64 × 40GbE or 256 × 10GbE.

Compatible Optics for Arista 7250QX-64 at FS.COM

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. FS.COM provides many high-quality compatible 40G QSFP+ DAC cables and 40G QSFP+ modules for Arista 7250QX-64. You can see it clearly in the following tables.

40G QSFP+ Direct Attach Cables
Description of 40G QSFP+ DAC

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.

40G QSFP+ Optical Transceivers

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. FS.COM offers the above 40G QSFP+ optical transceivers, which is of compatibility and performance. In addition, all of FS.COM’s optical transceiver are tested for 100% functionality and guaranteed compatible for outstanding network performance.

Summary

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. FS.COM offers large and in-stock Arista 40G QSFP+ DAC cables as well as 40G QSFP+ optical transceivers with low cost but high quality. Besides, our products are free shopping right now in USA, Canada and Mexico. If you need any of our products, please feel free to contact us.