Dear admin,

One day I found that there is some problem in Eth-trunk. I tried to investigate but I failed. After that  I put this problem to Hauwei support website . I am very happy to say that I got the solution within shortest time.

 

Huawei provided solution:

Traffic are transmitted through a pair fiber cable W and single fiber has been pull out. But OSPF hello packet are transmitted through another pair fiber cable which is pair X.

When pull the single fiber of pair W, OSPF peer still under full state and OSPF peer aging never convergence. Hello packet still send through pair X but traffic are transmit through pair W. This is the reason why SHLR and IGW generating the network alarm.

- Configure the BFD with PST mode. 
- Try to perform failover again, no packet drop. 
- BFD convergence approximately 50ms. 

 

Thanks to Huawei team

Very good & keep it up..