As a supplier of Huawei switches, I'm often asked about the configuration of Link Aggregation Control Protocol (LACP) on Huawei switches. LACP is a crucial technology that allows multiple physical links to be combined into a single logical link, enhancing bandwidth, providing redundancy, and improving network reliability. In this blog post, I'll guide you through the process of configuring LACP on a Huawei switch, using several popular models as examples.
Understanding LACP
Before diving into the configuration steps, it's essential to understand what LACP is and why it's important. LACP, defined by IEEE 802.3ad, is a protocol that enables switches to automatically negotiate the formation of link aggregation groups (LAGs) between two devices. By bundling multiple physical links together, LACP increases the available bandwidth and provides link redundancy. If one link fails, the traffic can be automatically redirected to the remaining links in the LAG, ensuring uninterrupted network connectivity.
Prerequisites
- Hardware: You'll need a Huawei switch that supports LACP. Some popular models include the Huawei S5700 Switch, Huawei Switch S5735, and Huawei Switch S6730.
- Software: Ensure that your switch is running a compatible version of the Huawei operating system.
- Network: You'll need at least two physical links between the switches that you want to configure for LACP.
Configuration Steps
Step 1: Enter System View
First, log in to the Huawei switch using a terminal emulator such as PuTTY. Once logged in, enter the system view by typing the following command:
<Huawei> system-view
This command takes you from the user view to the system view, where you can configure global settings on the switch.
Step 2: Create a Link Aggregation Group
In the system view, create a new link aggregation group (LAG). You can choose either a static LAG or a dynamic LAG. For LACP, we'll use a dynamic LAG. To create a dynamic LAG, use the following command:
[Huawei] interface Eth-Trunk [trunk-id]
Replace [trunk-id] with a unique identifier for the LAG. For example, if you want to create LAG 1, the command would be:
[Huawei] interface Eth-Trunk 1
Step 3: Configure LACP Mode
Once you've created the LAG, configure it to use LACP. Use the following command to set the LAG mode to LACP:
[Huawei-Eth-Trunk1] mode lacp-static
This command configures the LAG to use LACP in static mode, which means that the switch will actively negotiate the formation of the LAG with the connected device.
Step 4: Add Physical Interfaces to the LAG
Next, add the physical interfaces that you want to include in the LAG. You can add multiple interfaces to the LAG to increase the available bandwidth. To add an interface to the LAG, use the following command:
[Huawei-Eth-Trunk1] trunkport gigabitethernet [interface-id]
Replace [interface-id] with the identifier of the physical interface. For example, if you want to add GigabitEthernet 0/0/1 to the LAG, the command would be:
[Huawei-Eth-Trunk1] trunkport gigabitethernet 0/0/1
Repeat this step for each physical interface that you want to include in the LAG.
Step 5: Configure LACP Priority (Optional)
You can configure the LACP priority of the switch to determine which switch will be the active device in the LAG. The lower the priority value, the higher the priority. To configure the LACP priority, use the following command:
[Huawei-Eth-Trunk1] lacp priority [priority-value]
Replace [priority-value] with a number between 0 and 65535. For example, if you want to set the priority to 100, the command would be:
[Huawei-Eth-Trunk1] lacp priority 100
Step 6: Save the Configuration
Once you've configured the LAG, save the configuration to ensure that it persists after a reboot. Use the following command to save the configuration:
[Huawei-Eth-Trunk1] quit
[Huawei] save
The quit command takes you back to the system view, and the save command saves the configuration to the switch's flash memory.
Verifying the Configuration
After configuring LACP on the switch, you can verify the configuration to ensure that it's working correctly. Use the following commands to check the status of the LAG:
[Huawei] display interface eth-trunk [trunk-id]
Replace [trunk-id] with the identifier of the LAG. This command displays detailed information about the LAG, including the status of the physical interfaces and the LACP negotiation status.
[Huawei] display lacp statistics eth-trunk [trunk-id]
This command displays statistics about the LACP negotiation, such as the number of LACP packets sent and received.
Troubleshooting Tips
- Link Status: If the LAG is not working correctly, check the status of the physical interfaces. Make sure that the interfaces are up and running, and that there are no link errors.
- LACP Negotiation: If the LACP negotiation fails, check the LACP configuration on both switches. Make sure that the LAG mode, LACP priority, and other settings are consistent on both devices.
- Bandwidth: If the available bandwidth is lower than expected, check the number of physical interfaces included in the LAG. Make sure that all the interfaces are working correctly and that there are no bandwidth limitations.
Conclusion
Configuring LACP on a Huawei switch is a straightforward process that can significantly enhance the performance and reliability of your network. By following the steps outlined in this blog post, you can easily create a link aggregation group using LACP on your Huawei switch. If you have any questions or need further assistance with LACP configuration or other Huawei switch-related issues, please don't hesitate to contact us for procurement and in - depth discussions. We're here to provide you with the best solutions for your network needs.
References
- Huawei Switch Configuration Guide
- IEEE 802.3ad Standard
