HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Command Referenc - Page 132

Routers on the network cannot find neighbors through broadcasting hello packets, so you must specify neighbors and neighbor DR priorities on the routers. After startup, a router sends a hello packet to neighbors with DR priorities higher than 0. When the DR and BDR are elected, the DR will send hello packets to all neighbors for adjacency establishment. The cost set with the peer command applies only to P2MP neighbors. If no cost is specified, the cost to the neighbor equals the local interface's cost. A router uses the priority set with the peer command to determine whether to send a hello packet to the neighbor rather than for DR election. The DR priority set with the ospf dr-priority command is used for DR election. Examples # Specify the neighbor 1.1.1.1. system-view [Sysname] ospf 100 [Sysname-ospf-100] peer 1.1.1.1 Related commands ospf dr-priority preference Use preference to set a preference for OSPF. Use undo preference to restore the default. Syntax preference [ ase ] [ route-policy route-policy-name ] value undo preference [ ase ] Default The preference is 10 for OSPF internal routes and 150 for OSPF external routes (or ASE routes). Views OSPF view Predefined user roles network-admin Parameters ase: Sets a preference for OSPF external routes. Without this keyword, the command sets a preference for OSPF internal routes. route-policy route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 characters, to set a preference for the specified routes. value: Specifies the preference value in the range of 1 to 255. The smaller the value, the higher the preference. Usage guidelines If multiple routing protocols find routes to the same destination, the router uses the route found by the protocol with the highest preference. 121