配置bdf

[R2]ip route-static 10.9.9.0 24 10.1.12.1
[R2]ip route-static 10.9.9.0 24 10.1.23.3 preference 80

[R1]bfd
[R1]bfd ab bind peer-ip 10.1.12.2
[R1-bfd-session-ab]discriminator local 10
[R1-bfd-session-ab]discriminator remote 20

[R2]bfd
[R2]bfd ab bind peer-ip 10.1.12.1
[R2-bfd-session-ab]discriminator local 20
[R2-bfd-session-ab]discriminator remote 10

配置bdf

原文：https://www.cnblogs.com/bayue9/p/14851623.html