Network cabling architectures for Data Centers

The selection of the network cabling architecture is driven by both the technical and financial factors of the data center design. In general, ToR architectures are better suited for data center environments requiring low latency and high-performance server connections where EoR and MoR architectures look to optimize cost and flexibility.

WHAT IS IT?

Multiple network cabling architectures are available to provide connectivity to the various spaces within the data center.

ER – ENTRANCE ROOM

The space where the carrier circuits and demarcation equipment are located. For security reasons it is typically in a separate room than data center computer room.

MDA – MAIN DISTRIBUTION AREA

The space where core layer equipment such as routers, LAN/SAN switches, PBXs and Muxes are located.

HDA – HORIZONTAL DISTRIBUTION AREA

The space where aggregation layer equipment such as LAN/SAN/KVM switches are located.

EDA – EQUIPMENT DISTRIBUTION AREA

The space where access layer equipment such as LAN/SAN/KVM switches and servers are located.

ZDA – ZONE DISTRIBUTION AREA

The space where a consolidation point or other intermediate connection point is located.


NETWORK CABLING ARCHITECTURES

Centralized

LAN/SAN switches are consolidated in a centralized MDA and HDA row.

ToR – Top of Rack

LAN/SAN switches are located within the EDA cabinet or rack. HDA is not used in this configuration.

EoR – End of Row

LAN/SAN switches are located at the end of the network row within an HDA cabinet or rack.

MoR – Middle of Row

LAN/SAN switches are located in the middle of the network row within an HDA cabinet or rack.

WHY IS IT IMPORTANT?

The selection of the network cabling architecture is driven by both the technical and financial factors of the data center design. In general, ToR architectures are better suited for data center environments requiring low latency and high-performance server connections where EoR and MoR architectures look to optimize cost and flexibility.