3Com MSR 30, MSR 50 Preference, Examples # Specify the neighbor IP address, Undo preference ase

1152 CHAPTER 76: OSPF CONFIGURATION COMMANDS

undo peer ip-address

View OSPF view

Parameters ip-address: Neighbor IP address.

dr-priority: Neighbor DR priority, in the range 0 to 255, the bigger the value, the higher the priority.

Description Use the peer command to specify the IP address of an NBMA neighbor, and the DR priority of the neighbor.

Use the undo peer command to remove the configuration.

The DR priority of NBMA neighbors defaults to 1.

On an X.25 or Frame Relay network, you can configure mappings to make the network fully meshed (any two routers have a direct link in between), so OSPF can handle DR/BDR election as it does on a broadcast network. However, since routers on the network cannot find neighbors via broadcasting hello packets, you need to 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.

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-prioritycommand is used for DR election.

Related commands: ospf dr-priority.

Examples # Specify the neighbor IP address 1.1.1.1.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] peer 1.1.1.1

preference

Syntax	preference [ ase ] [ route-policy route-policy-name] value
	undo preference [ ase ]
View	OSPF view
Parameters	ase: Sets priority for ASE routes. If the keyword is not specified, using the
	command sets priority for internal routes.
	route-policy: Applies a route policy to set priorities for specified routes.