MOR
What is MOR (Middle of Row)?
MOR (Middle of Row) refers to a network architecture where networking equipment, such as switches, is positioned in the middle of each row of server racks within a data center or server room. Servers within each rack connect to a patch panel, and the patch panel is then connected to the switch in the middle of the row.The connection mode of MOR switch is similar to the EOR mode. Access switches are deployed in one or two cabinets of a cabinet group through the centralized mode. Only the location of the network cabinet is in the middle of the cabinet group. In this case, the connection between the server cabinet and the network cabinet will be simplified.
Advantages of MOR
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1. Reduced Cabling Complexity: Placing the network cabinet in the middle of the row reduces the cable length required to connect the server cabinets to the network cabinet. This simplifies the cabling infrastructure and reduces the potential for cable clutter and tangling.
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2. Simplified Management and Maintenance: With MOR, the network equipment is centrally located in the middle of the row. This centralized placement makes it easier to manage and maintain the networking infrastructure. Technicians have better access to the switches and patch panels, simplifying troubleshooting, cable management, and equipment maintenance tasks.
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3. Improved Airflow and Cooling: By positioning the network cabinet in the middle, MOR helps in better airflow management within the row of server cabinets. This arrangement can enhance cooling efficiency and reduce the risk of hot spots, ensuring optimal operating conditions for the network and server equipment.
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4. Flexibility and Scalability: MOR allows for easier scalability and flexibility in network expansion. As new server cabinets are added to the row, the network cabinet in the middle can accommodate additional connections without significant reconfiguration. This makes it more convenient to scale up the network infrastructure as the organization's requirements grow.
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5. Balanced Network Performance: Placing the network cabinet in the middle distributes the network connections more evenly across the server cabinets. This helps to balance the network load and reduce latency, ensuring consistent and reliable network performance for all servers.
TOR vs EOR vs MOR
Network Architecture
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TOR (Top of Rack)
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EOR (End of Row)
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MOR (Middle of Row)
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Location of Switches
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Top of individual racks
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End of each row
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Middle of each row
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Server-to-Switch Connectivity
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Direct connection between servers and rack-level switches
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Servers connect to patch panels, which are connected to row-level switches
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Servers connect to patch panels, which are connected to row-level switches
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Number of Switches
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Each rack has its own dedicated switch
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Multiple racks share a single switch at the end of the row
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Multiple racks share a single switch in the middle of the row
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Cabling Complexity
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Simplified cabling within individual racks
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Reduced cabling compared to TOR, but longer cable runs within rows
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Reduced cabling compared to TOR, shorter cable runs compared to EOR
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Scalability
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May require more switches as the number of racks increases
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Scalable, as additional racks can be connected to the same row-level switch
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Scalable, as additional racks can be connected to the same row-level switch
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Cable Management
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Simplified cable management within individual racks
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More complex cable management compared to TOR
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Intermediate complexity in cable management
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Space Requirement
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Requires space at the top of each rack for switches
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Requires space at the end of each row for switches
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Requires space in the middle of each row for switches
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Cost Consideration
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Potentially higher cost due to more switches
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Potentially lower cost compared to TOR
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Moderate cost with a balance between TOR and EOR
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It's important to note that the suitability of each architecture depends on the specific requirements, scale, and constraints of the network infrastructure. The table provides a general comparison, but the final decision should be based on factors such as the size of the data center, number of servers, scalability needs, cabling complexity, available space, and budget considerations.
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