Link Bonding with Open Routers - Improving Network Performance

By Dani Kiryati 5 min read

Telecom network operators of all sizes face increasing demands for high-speed data transmission, reliable connectivity, and efficient resource utilization. To meet these challenges, network operators are deploying advanced technologies that can support higher bandwidths, faster data rates, and more sophisticated traffic engineering.

In this article, we’ll take a look at the role link aggregation and traffic engineering plays in wireless telecom, and how it can improve network performance and provide stable capacity. We’ll also compare the pros and cons of Layer 1 vs. Layer 2 link bonding and explore the benefits in relation to Disaggregated Open Routers (DOR) like the IP-50FX, the industry’s first radio-aware DOR.

If you would like to read more about innovative applications for Disaggregated Cell Site Gateways (DCSG) and open routers head over to our recent Open Router Use Case Roundup blog.

What is Link Aggregation in Wireless Networks?

Link aggregation is a technique used in wireless networks to combine multiple physical links into a single logical link, providing higher bandwidth and greater reliability. This allows for more data to be transmitted simultaneously and provides redundancy in case one of the physical links fails. Link aggregation can help to balance the load across multiple links, which can improve overall network performance.

link aggregation can be implemented at different layers of the protocol stack, such as Layer 1 (Physical link bonding), Layer 2 (LAG), or Layer 3, depending on the specific requirements and constraints of the network.

With Layer 1 link bonding, different bandwidth members (radio channels with different bandwidths, for example, 10Gbps and 1Gbps) can be aggregated and load balanced packet by packet, unlike L2 LAG where it’s done with a hash function.

All members aggregated in the same link bonding group are configured with a single virtual interface that can be set either switched or routed. Layer 1 link bonding offers advanced features and traffic engineering for efficient packet forwarding and load balancing that are not available with Layer 2.

Benefits of Layer 1 Link Bonding on Disaggregated Open Routers

1. Improved Load Balancing: Layer 1 link bonding allows for improved load balancing between different bandwidth members, which can optimize resource utilization and increase network performance. By balancing the load packet by packet, Layer 1 link bonding ensures each physical link is used efficiently and that the network capacity is fully utilized.

2. Simplified Network Configuration: All members aggregated in the same link bonding group are configured with a single virtual interface that can be either switched or routed. This simplifies the network configuration and reduces the complexity of managing multiple physical links.

3. Automatic Capacity Adjustment: Layer 1 link bonding enables each member to react individually to bandwidth notification messages received from the radios by adjusting the capacity accordingly. This can help to ensure that the network operates at peak efficiency and that resources are allocated to where they are needed most.

4. Automatic Traffic Rerouting: If one of the members experiences a bandwidth decrease or disconnection, Layer 1 link bonding will initiate an automatic traffic reroute to ensure that the network remains operational. This helps to improve network reliability and minimize downtime.

5. Traffic Prioritization: In case there is no additional path for redundancy, the router will prioritize the most important traffic to ensure that critical applications continue to operate. This can help to ensure that mission-critical services, such as emergency communications, are not disrupted.

Link aggregation is an important technique in wireless connectivity that can help to improve network performance, reliability, and capacity. Layer 1 link bonding paired with Disaggregated Open Routers like the IP-50FX can deliver improved load balancing, simplified configuration, automated capacity adjustments, traffic rerouting, and prioritization.

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