With the development of high-bandwidth applications such as cloud computing, AI applications, and the Internet of Things, upgrading to 100G Ethernet is imperative. To address the rigorous challenge of explosive data traffic growth, improving network performance is urgent. Traditional 10G, 25G, and even 40G networks can no longer meet the growing business demands. Upgrading to a 100G network can significantly increase bandwidth, reduce latency, and enable future-proofing. However, how can we smoothly transition to 100G from existing network infrastructure? This article will guide you through several methods to help you make an informed decision.
Upgrading from 10G to 100G Ethernet may seem like a significant leap, but there are methods to achieve it. However, upgrading from a 10G network to a 100G network involves higher costs, as it requires changes to cabling and the addition of numerous devices. Therefore, proper planning is essential to minimize costs. Without modifying existing equipment, the following methods are available:
First, link aggregation can be used as a transitional solution to upgrade from 10G to 100G networks. The specific approach involves bundling four 10G links into a 40G link using a 1-to-4 splitter. The 40G module can then be used at a reduced speed on the QSFP28 port, while other 100G ports continue to use 100G modules normally, enabling an upgrade on the existing infrastructure. However, this solution involves significant changes to the network cabling, so it is generally only used as a temporary solution.
The second solution is to directly upgrade the core switch to 100G, use 10G devices as edge devices, and employ intermediate layer switches or compatible modules for bridging. This solution offers higher scalability, allowing for gradual network upgrades without requiring a large initial budget investment.
Upgrading from a 25G network to a 100G network is the mainstream upgrade solution, offering high operability and relatively lower costs. This is achieved by aggregating 25G signals into 100G signals using a 1-to-4 splitter, thereby completing the network upgrade. The advantage of this approach is that 100G equipment can be directly added to existing devices for connection without replacing the existing equipment, thereby saving significant costs. Additionally, its cabling is relatively simple, making it easier for subsequent operations and maintenance, and it offers low-power consumption options. Specifically, there are the following solutions:
First, a 1x4 patch cable can be used to connect one 100G module and four 25G modules, efficiently aggregating 25G signals into 100G signals. This connection method is commonly used for server-to-ToR switch connections, with the advantages of low cost and simple operation, enabling plug-and-play functionality.
The second method involves using a 100G Breakout 4x 25G DAC for connection, enabling direct upgrading of a 25G network to a 100G network. This passive DAC also features very low power consumption, helping to reduce overall network operational costs. The only drawback is its limited transmission distance, making it suitable for intra-rack and inter-rack transmission. This transmission method not only significantly improves switch port utilization but also simplifies cabling, making it easier to maintain in the future.
The third method is to use a 100G Breakout 4x 25G AOC for connection. It is similar to a DAC but has higher power consumption. Since it uses active components, it offers longer transmission distances and is typically used for connections within data centers, providing greater flexibility.
40G networks and 100G networks share common features, such as the use of MTP/MPO patch cables, and 40G modules can be used on QSFP28 ports. Therefore, upgrading from a 40G network to a 100G network is relatively straightforward. The upgrade can be achieved by simply replacing the modules or adding 100G devices to the existing infrastructure. The specific implementation options are as follows:
First, if upgrading from 40G SR4 to 100G SR4, the existing cabling can be retained; only the modules and end devices need to be replaced. However, the patch cables must be verified as either OM3 or OM4; if OM3, they must be upgraded to OM4 patch cables. Upgrading by replacing the devices at both ends can effectively reduce cabling costs. However, if upgrading from 40G SR4 to 100G LR4, the existing cabling must be replaced, so it is more advisable to perform a targeted upgrade based on the existing cabling to save significant costs.
Additionally, a phased upgrade approach can be used, where 100G equipment is deployed as core devices connected to the existing 40G network. This allows the network to be upgraded to 100G with a minimal budget, meeting the needs of core applications. Existing equipment can then be gradually replaced over time, with adjustments made according to business requirements, offering high cost-effectiveness. This approach not only meets business needs but also avoids unnecessary upgrades, ensuring the company grows steadily and sustainably.
If your initial network is 10G, we recommend upgrading via the 10G-25G-100G upgrade path. This network upgrade path can effectively reduce costs and operational expenses. Since 25G is an upgraded version of 10G, both can use the same cabling architecture, enabling seamless upgrades and effectively avoiding the high costs associated with extensive cabling modifications.
If your initial network is 25G, all three upgrade methods are available, and you can choose based on specific application requirements. For example, use 100G Breakout DAC for connections within or across racks, use 100G Breakout AOC for connections within the data center, and when longer distances need to be transmitted, use 100G modules and four 25G modules connected via MTP/MPO Breakout Cable.
If your network is already 40G Ethernet, we recommend a gradual upgrade approach. This allows you to meet business requirements without incurring high upgrade costs, adding equipment as needed based on company requirements. The only drawback is the need for larger space for equipment deployment, which you can choose based on specific needs.
Upgrading to 100G networks is a major trend. As the bandwidth requirements of various applications continue to grow, there will inevitably be a need for networks with higher transmission rates. Upgrading to 100G Ethernet not only meets current business needs but also paves the way for future demands.
