Data Center Cabling Solutions
Cabling the Arista 7500E Series

Cabling the Arista 7500E Series

  • Jan 18, 2017

By: Rick Dallmann | Senior Data Center Infrastructure Architect


It’s a month into the New Year, and you are just unwrapping your new Arista 7500E Series switch you spent that year-end budget on. You already know that the Arista 7500E Series offers more than 30Tbps of total capacity for 1,152 ports of 10GbE, or 288 ports of 40GbE and/or 96 ports of 100GbE.

You think, “Wow, all of that capacity in an 11U rack space!” But once the initial excitement wears off, you’ll have to ask yourself how you’re going to cable up, manage and connect 1,152 duplex LC ports in that amount of space?

Think about the cabling nightmares we’ve all experienced even with far fewer connectivity requirements. How would you proceed?

An Innovative Design

The data center architects here at CABLExpress have developed a design that we’ve nicknamed the “split trunk design.” This trunk design allows the end user to route one trunk in from the left side and one in from the right side on the Arista 7500 platform.

The 144-fiber/72-port trunk is specifically designed for the Arista 7500 and its 36-port QSFP+ line card for 10G/40G. The trunk’s specific length and port numbered staggers allow for perfect cable routing and cable management.

The trunk’s fiber path is based on parallel 40G counts of 8 lanes, based on the IEEE802.3bm standards. The 144 fiber count yields 18 QSFP+ MPOs. Based on these specifications, you only need two of these trunks per line card. This really helps simplify your cabling.

Arista 7500E/7500R/7300X Connectivity Guide

Want to learn more about cabling Arista switches? The purpose of this connectivity guide is to offer clear options in cabling the Arista 7500E, 7500R, 7300X and 7320X Series modular switches. Ensuring these switches are cabled to run optimally in your enterprise network requires specific light paths and performance levels for connectivity. Download the pdf below.

Arista 7500E/7500R/7300X Connectivity Guide - Download PDF