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MLAG and Switch Stacking for 40G Network Expansion

By FS Project Designer2019-08-01

FS Customer

Industry: IT Services

Location: Germany

Background

Network redundancy and expansion are essential to enhance overall reliability and efficiency in data centres. A famous information technology and service company is one of FS long-term partners.They managed to leverage FS enterprise cabling solutions to expand their network capacity and redundancy for reliable transmission of 40G-40G (east-west), and 10G-10G (north-south).

Challenge

How to achieve link redundancy and improve network reliability & scalability in the convergence and access layer?

How to deploy proper cabling solutions for 40G-40G (north-south) and 10G-10G (east-west) transmissions?

Solution

FS engineers decided to set up S5850-48S6Q as ToR switches and use MLAG to pair the two switches for network redundancy. The engineers also stacked three S3900-48T4S switches for easy configuration and management, while leaving enough room for any future expansion. Connection graph is shown below.


12 Fibres MTP to MTP Female Plenum (OFNP) OM4 (OM3) Multimode Elite Fibre Trunk Cable, Type B, 5m

A$100.00

S3900-48T4S 48-Port 10/100/1000BASE-T Gigabit Stackable Managed Switch with 4 10Gb SFP+ Uplinks

A$632.00

2.5m (8ft) Dell Force10 CBL-10GSFP-DAC-2.5M Compatible 10G SFP+ Passive Direct Attach Copper Twinax Cable

A$20.00


  •  

    For redundancy in convergence layer, 40G transceivers and female MTP-12, Type B trunk cables are used to connect two S5850-48S6Q switches, which can form an MLAG pair and bring redundancy for network resiliency.

  •  

    To expand the capacity in the access layer, three S3900-48T4S switches are stacked as a single entity by 10G DAC cables.

  •  

    The stacked S3900-48T4S switches are aggregated to the S5850-48S6Q switches by 10G DAC cables. Those cables are suitable for connections within racks and between adjacent racks with low costs. 10G-10G connections between S3900-48T4S and BMCs are achieved.

Conclusion

FS engineers use MLAG and stacking to feed the customer’s current network need with resiliency and reliability, and achieve the transmissions of 40G-40G (north-south) and 10G-10G (east-west). This solution also helps our customer to prepare well for further expansion.

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