2-3z When configuring a static route, the static route does not take effect if you specify the next hopaddress first and then configure it as the IP address of a local interface.z If you do not specify the preference when configuring a static route, the default preference will beused. Reconfiguring the default preference applies only to newly created static routes.z You can flexibly control static routes by configuring tag values and using the tag values in therouting policy.z If the destination IP address and mask are both configured as 0.0.0.0 with the ip route-staticcommand, the route is the default route.Detecting Reachability of the Static Route’s NexthopIf a static route fails due to a topology change or a fault, the connection will be interrupted. To improvenetwork stability, the system needs to detect reachability of the static route’s next hop and switch to abackup route once the next hop is unreachable.Following method can be used to detect reachability of the static route’s next hop.Detecting Nexthop Reachability Through TrackIf you specify the nexthop but not outgoing interface when configuring a static route, you can associatethe static route with a track entry to check the static route validity:z When the track entry is positive, the static route's nexthop is reachable and the static route takeseffect.z When the track entry is negative, the static route's nexthop is unreachable and the static route isinvalid. For details about track, refer to Track Configuration in the System Volume.Network requirementsTo detect the reachability of a static route's nexthop through a Track entry, you need to create a Trackfirst. For detailed Track configuration procedure, refer to Track Configuration in the System Volume.Configuration procedureFollow these steps to detect the reachability of a static route's nexthop through Track:To do… Use the command… RemarksEnter system view system-view —Associate the staticroute with a track entryip route-static dest-address { mask | mask-length }next-hop-address track track-entry-number [ preferencepreference-value ] [ tag tag-value ] [ descriptiondescription-text ]RequiredNotconfigured bydefault
