4-35To do… Use the command… RemarksConfigure the defaultparameters for redistributedroutes (cost, route number, tagand type)default { cost cost | limit limit | tag tag | typetype } *OptionalBy default, the default costis 1, default upper limit ofroutes redistributed pertime is 1000, default tag is1 and default type ofredistributed routes isType-2.Advertising a Host RouteFollow these steps to advertise a host route:To do… Use the command… RemarksEnter system view system-view —Enter OSPF viewospf [ process-id | router-idrouter-id | vpn-instanceinstance-name ] *—Enter area view area area-id —Advertise a host route host-advertise ip-address costOptionalNot advertised by default.Configuring OSPF Network OptimizationYou can optimize your OSPF network in the following ways:z Change OSPF packet timers to adjust the OSPF network convergence speed and network load.On low speed links, you need to consider the delay time for sending LSAs on interfaces.z Change the interval for SPF calculation to reduce resource consumption caused by frequentnetwork changes.z Configure OSPF authentication to meet high security requirements of some mission-criticalnetworks.z Configure OSPF network management functions, such as binding OSPF MIB with a process,sending trap information and collecting log information.PrerequisitesBefore configuring OSPF network optimization, you have configured:z IP addresses for interfaces;z OSPF basic functions.