Floating static routes and BFD for routing to achieve automatic update
Work router is forwarding packets from the source device to the target device. Between them may have several routers. Routers use routing tables of the database referred to forward these packets. Static Routing (Static routing), A route way, manually configure the routing entry, rather than dynamic decision. Even if the network status has changed or re-configuration, static routing will not change.
BFD (Bidirectional Forwarding Detection, BFD) is a common, standardized, regardless of the media and protocol independent fast fault detection mechanism for detecting connectivity of the IP network link, to ensure that can quickly detect communication between the device failure to be able to take timely measures to ensure the continued operation of the business.
[AR1]bfd
[AR1-bfd]quit
[AR1]bfd tobeijing bind peer-ip 172.18.1.1
[AR1-bfd-session-tobeijing]discriminator local 10
[AR1-bfd-session-tobeijing]discriminator remote 20
[AR1-bfd-session-tobeijing]commit
[AR1-bfd-session-tobeijing]quit
[AR1]undo ip route-static 192.168.1.0 24 172.18.1.1
[AR1]ip route-static 192.168.1.0 24 172.18.2.2 track bfd-session tobeijing
[AR3]bfd
[AR3-bfd]quit
[Ahri3] bfd toshanghai bind peer-ip 172.18.2.1
[AR3-bfd-session-toshanghai]discriminator local 20
[AR3-bfd-session-toshanghai]discriminator remote 10
[AR3-bfd-session-toshanghai]commit
[AR3-bfd-session-toshanghai]quit
[AR3]undo ip route-static 192.168.0.0 24 172.18.2.1
[AR3]ip route-static 192.168.0.0 24 172.18.2.1 track bfd-session toshanghai