[AF] Aggregation port cannot be selected when Interfaces configured

Problem Description

Customer feedback: When configuring Interfaces aggregation, ports 9-12 cannot be selected, and Interfaces are normally lit (ports 7-8 have been configured for aggregation)

Effective troubleshooting steps

1. Interfaces aggregation only supports aggregation with the same driver type. Use ethtool -i ethx in the background to check the corresponding Interfaces type. The comparison shows that they are consistent.

2. After manually ifconfig ethx down/up, the problem still exists;

3. Check the interface configuration and find that the customer has configured Interfaces. After deleting the Interfaces configuration (the configuration needs to be deleted, disabling it is invalid), ports 9-12 can be selected for aggregation normally.

Root cause

Interfaces is configured, causing Interfaces to fail to be aggregated.

solution

After communicating with the customer, the Interfaces deleted and the aggregation was successfully configured normally.

Suggestions and Conclusion

1. The design logic of the aggregation port status itself cannot be affected by the down state of another Interfaces. When two physical ports are aggregated, they are logically bonded ports. Therefore, the Interfaces for physical ports is not applicable to aggregation ports.

2. The data synchronization port of Link Aggregation does not support the selection of interfaces configured with Interfaces linkage, because the design logic of the data synchronization port does not require linkage with other Interfaces.

Original Link

https://support.sangfor.com.cn/cases/list?product_id=13&type=1&category_id=1323&isOpen=true