ToR & EoR Data Center Designs

This post is my snippet of Brad Hedlund article about ToR and EoR design which is accessible via the following link:

Top of Rack Design

ToR is sometimes called In-Rack design.

  • All copper cabling for servers stays within the rack as relatively
  • there is no need to for a large copper cabling infrastructure
  • Any network upgrades or issues with the rack switches will generally only affect the servers within that rack
  • any future support of 40 or 100 Gigabit on twisted pair will likely have very short distance limitations (in-rack distances). This too is another key factor why Top of Rack would be selected over End of Row.

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