9NOTE:• When you configure a static route, the static route does not take effect if you specify the next hop addressfirst and then configure it as the IP address of a local interface, such as Ethernet interface and VLANinterface.• If you do not specify the preference when you configure a static route, the default preference will beused. Reconfiguring the default preference applies only to newly created static routes.• You can flexibly control static routes by configuring tag values and using the tag values in the routingpolicy.• If the destination IP address and mask are both configured as 0.0.0.0 with the ip route-static command,then the route is the default route.• For detailed information about track, seeHigh Availability Configuration Guide.Configuring BFD for static routesNOTE:Only the S5500-E1 Switch Series supports BFD for static routes.Bidirectional forwarding detection (BFD) provides a general-purpose, standard, medium-, andprotocol-independent fast failure detection mechanism. It can uniformly and quickly detect the failures ofthe bidirectional forwarding paths between two routers for protocols, such as routing protocols. For moreinformation about BFD, see High Availability Configuration Guide.A dynamic routing protocol notifies BFD of its neighbor information. BFD uses such information toestablish sessions with neighbors by sending BFD control packets. Static routing has no neighbordiscovery mechanism. This section describes how static routing implements BFD.BFD control packet modeTo use BFD control packets for bidirectional detection between two devices, you must enable BFD controlpacket mode for each device’s static route destined to the peer.To configure a static route and enable BFD control packet mode for it, specify an outbound interface anda direct next hop—BFD establishes a direct session, or specify an indirect next hop and a specific BFDpacket source address—BFD establishes an indirect session—for the static route.Follow these steps to configure a static route with BFD control packet mode enabled (direct session):To do… Use the command… RemarksEnter system view system-view —ip route-static dest-address { mask | mask-length } interface-typeinterface-number next-hop-address bfd control-packet[ preference preference-value ] [ tag tag-value ] [ descriptiondescription-text ]Configure a static routeand enable BFD controlpacket mode for it ip route-static vpn-instance s-vpn-instance-name&<1-6>dest-address { mask | mask-length } interface-typeinterface-number next-hop-address bfd control-packet[ preference preference-value ] [ tag tag-value ] [ descriptiondescription-text ]RequiredUse eithercommand
