117Advertising a host routeTo do… Use the command… RemarksStep 1 Enter system view system-view —Step 2 Enter OSPF viewospf [ process-id | router-idrouter-id | vpn-instanceinstance-name ] *—Step 3 Enter area view area area-id —Step 4 Advertise a host route host-advertise ip-address cost RequiredNot advertised by defaultConfiguring OSPF network optimizationYou can optimize your OSPF network as follows:• Change OSPF packet timers to adjust the OSPF network convergence speed and networkload. On low-speed links, consider the delay time for sending LSAs on interfaces.• Change the interval for SPF calculation to reduce resource consumption caused by frequentnetwork changes.• Configure OSPF authentication to meet high security requirements of some mission-criticalnetworks.• Configure OSPF network management functions, such as binding OSPF MIB with a process,sending trap information, and collecting log information.Prerequisites• IP addresses for interfaces• OSPF basic functionsConfiguring OSPF packet timersYou can configure the following timers on OSPF interfaces as needed:• Hello timer: Interval for sending hello packets. It must be identical on OSPF neighbors. Thelonger the interval, the lower the convergence speed and the smaller the network load.• Poll timer: Interval for sending hello packets to the neighbor that is down on the NBMAnetwork.• Dead timer: Interval within which if the interface receives no hello packet from the neighbor,it declares the neighbor is down.• LSA retransmission timer: Interval within which if the interface receives no acknowledgementpackets after sending a LSA to the neighbor, it will retransmit the LSA.
