How to configure link detection on Ruijie firewall?

Introduction of link detection

Link detection is a method of using a detection protocol to detect in real time whether the current link is working normally.

Applied scenarios

The firewall has two ISP connections, mainly to achieve multi-link load balancing, so the default route of the export is configured as ECMP (equal cost routing). When the ISP line is abnormal (such asthe ISP internal line is interrupted), the firewall export still detects thatthe interface is in the UP state. At this time, the traffic forwarded fromexport will be interrupted, and the firewall device cannot detect it. Or whenspecific congestion or errors occur in the ISP network, such as the blocking ofTCP packets and HTTP packets in the ISP network, it cannot be judged, resultingin abnormalities in some network traffic.

Case of configuration

a) Requirement

The firewall needs to support the link detectionfunction.

b) Network Topology

c) Configuration

1
）
config link detection function

2) bind the link detection to routing

3) bind the link detection to interface