H3C S9500 Series Operation Manual

Also see for S9500 Series: Operation manual Operation manual Operation manual Operation manual Operating manual

Contents

Operation Manual – Routing ProtocolH3C S9500 Series Routing Switches Chapter 4 OSPF Configuration4-17According to RFC2328, the consistency of Hello intervals between network neighborsshould be kept. The Hello interval value is in inverse proportion to the routeconvergence rate and network load.Perform the following configuration in interface view.Table 4-17 Set the Hello intervalOperation CommandSet the hello interval of the interface ospf timer hello secondsRestore the default hello interval of the interface undo ospf timer helloSet the poll interval on the NBMA interface ospf timer poll secondsRestore the default poll interval undo ospf timer pollBy default, p2p and broadcast interfaces send Hello packets every 10 seconds, andp2mp and nbma interfaces send Hello packets every 30 seconds.II. Setting a dead timer for the neighboring routersThe dead timer of neighboring routers refers to the interval in which a router will regardthe neighboring router as dead if no Hello packet is received from it. The user can set adead timer for the neighboring routers.Perform the following configuration in interface view.Table 4-18 Set a dead timer for the neighboring routersOperation CommandConfigure a dead timer for the neighboring routers ospf timer dead secondsRestore the default dead interval of theneighboring routers undo ospf timer deadBy default, the dead interval for the neighboring routers of p2p or broadcast interfacesis 40 seconds and that for the neighboring routers of p2mp or nbma interfaces is 120seconds.Note that both hello and dead timer will restore to the default values after the usermodify the network type.III. Setting an interval for LSA retransmission between neighboring routersIf a router transmits a Link State Advertisements (LSA) to the peer, it requires theacknowledgement packet from the peer. If it does not receive the acknowledgementpacket within the retransmit time, it will retransmit this LSA to the neighbor. The value ofretransmit is user-configurable.Perform the following configuration in interface view.