Router Interface Trunking: Increasing Bandwidth and Reducing Complexity

In today’s world, businesses require high-speed connectivity to function efficiently. Router interface trunking is a method used for increasing bandwidth and reducing complexity. In this article, we will take an in-depth look at Router Interface Trunking, including how it works, how it can benefit your business, and how to set it up.

What is Router Interface Trunking?

Router Interface Trunking, commonly known as link aggregation, is a networking technique that combines multiple physical connections between devices into a single virtual connection. It allows multiple Ethernet links to share the same logical address, which increases bandwidth and provides redundancy, load balancing and fault tolerance.

How Does Router Interface Trunking Work?

Router Interface Trunking works by taking multiple Ethernet interfaces and combining them into one logical interface. This logical interface, also known as a channel, provides increased bandwidth and allows the network to use all the available bandwidth from the multiple physical interfaces. It also provides load balancing, redundancy, and fault tolerance, reducing network downtime.

Benefits of Router Interface Trunking

1. Increased Bandwidth: Router Interface Trunking allows multiple physical paths to be combined into a single logical path, increasing the bandwidth and allowing more data to be transmitted simultaneously.

2. Load Balancing: By dividing data across multiple physical links, Router Interface Trunking ensures that none of the links get overwhelmed with traffic, even during peak periods.

3. Redundancy: Router Interface Trunking provides automatic failover protection, which means that if one link goes down, the network can continue to function through an alternate link.

4. Fault Tolerance: Router Interface Trunking provides the network with the ability to maintain uninterrupted service in case one of the links fails.

How to Set Up Router Interface Trunking

Setting up Router Interface Trunking requires the following steps:

1. Confirm Router Compatibility: Router Interface Trunking requires specific hardware and software capabilities to enable links to be aggregated. Check with your router vendor to confirm if your router supports Router Interface Trunking.

2. Configure the Physical Links: Connect the Ethernet interfaces on your devices using Ethernet cables. Ensure that the links are configured to be in the same VLAN.

3. Configure the Logical Interface: Once the physical links are connected, configure the logical interface by creating a Link Aggregation Group (LAG) in the router’s interface.

4. Verify the Configuration: Verify that the configuration is successful by using a ping or traceroute command to test the connectivity.

Editor Comments:

Router Interface Trunking is a popular and effective way to increase bandwidth and reduce complexity in today’s business networks. It provides benefits like increased bandwidth, load balancing, redundancy and fault tolerance, making it an essential requirement for any business that deals with large amounts of data. Furthermore, setting up Router Interface Trunking is relatively easy, requiring only a few steps.


1. Can Router Interface Trunking Be Used with Any Type of Router?
No, Router Interface Trunking requires specific hardware and software capabilities to enable links to be aggregated. Incompatible routers will not support Router Interface Trunking.

2. Can Router Interface Trunking Be Used with Any Type of Ethernet Link?
No, the Ethernet links must be the same speed and duplex mode. Otherwise, the links will not synchronize correctly.

3. Are There Any Potential Downsides to Router Interface Trunking?
Yes, Router Interface Trunking requires that all the links are in the same network domain. This means that router interface trunking does not provide load balancing across different subnets.

4. Can Router Interface Trunking Be Set Up with Different Vendors’ Devices?
Yes, Router Interface Trunking can be set up with different vendors’ devices as long as both devices support the appropriate standard. For example, both devices should support the IEEE 802.3ad standard.