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[AF] Load Policies Layer 3 is not effective. Interfaces selection Policies error

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Problem Description

Local is deployed at the exit. There are two external network lines. After doing load routing, it is found that one of the external network lines has no traffic.

Process——

  1. Check the device interface throughput and find that there is no traffic on one external network line.

    271945bcd281ec78ad.png (174.4 KB)

  2. Check the multi-line load routing and find that the Interfaces selection Policies is to give priority to eth2 port

    72465bcd28d116fae.png (137.93 KB)

Root cause

Give priority to the front line: Give priority to the front link. Only when the front link fails, the back link will be used.

solution

After changing the Interfaces selection Policies to three methods other than giving priority to the previous line, both external network lines have traffic running

502305bcd2a1967fb2.png (144.01 KB)

Suggestions and Conclusion

Round robin: Active links are selected in turns. The likelihood that each link is selected is the same.

Bandwidth ratio round robin: This method is similar to weighted Round Robin. However, weights are not specified numbers but dynamic ratio calculated according to the bidirectional bandwidth on different WAN links. It aims at balancing the bandwidth usage on the available WAN links based on new scheduled connection, regardless of connection failure or realtime bandwidth on the WAN link.

Weighted least traffic: This method is similar to weighted Round Robin as well. However, weights are not specified numbers but dynamic ratio calculated according to the bidirectional bandwidth on different WAN links. It aims at balancing the bandwidth usage on the available WAN links based on the new scheduled traffic.
Give priority to the front line: Give priority to the front link. Only when the front link fails, the back link will be used. You can adjust Interfaces selection priority by moving the interface list Priority

Original Link

https://support.sangfor.com.cn/cases/list?product_id=13&type=1&category_id=443&isOpen=true