An important criterion for network reliability is whether the network can be quickly detected and restored.Due to the low efficiency of most network technologies'built-in error detection mechanisms,fast detection cannot be achieved.As a millisecond level mechanism that can provide fast detection services for a large number of protocols,BFD is widely used.This article explains the working principle of BFD and proposes a fast recovery solution for the linkage design of BFD and VRRP,combined with possible fault scenarios in VRRP networks.The scheme was simulated and demonstrated in ENSP,ultimately verifying its fast and effective performance.
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