华为：
bfd
quit
bfd bfd1 bind peer-ip 10.0.0.1 interface g0/0/1 source-ip 10.0.0.2
ip route-static 0.0.0.0 0.0.0.0 g0/0/1 10.0.0.1 track bfd-session bfd1
华三：
interface g1/0/1
ip address 10.0.0.2 255.255.255.0
bfd min-transmit-interval 1000
bfd min-receive-interval 1000
quit
ip route-static 0.0.0.0 0.0.0.0 g1/0/1 10.0.0.1 bfd control-packet