3com 5500-ei pwr Installation Instruction

 

4-14 

packet exchange between an OSPF process and other routers. Therefore, packets can be exchanged 

between routers with different OSPF processes IDs. 

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Configuring an area and the network segments in the area. You need to plan areas in an AS before 

performing the corresponding configurations on each router. 

When configuring the routers in the same area, please note that most configurations should be 

uniformly made based on the area. Wrong configuration may disable information transmission between 

neighboring routers and even lead to congestion or self-loop of routing information. 

Follow these steps to perform basic OSPF configurations: 

Enter system view 

— 

Configure the router ID 

router id router-id 

Optional 

If multiple OSPF processes run on a 
router, you are recommended to use 
the router-id keyword in the ospf 
command to specify different router 
IDs for different processes. 

Enable OSPF and enter 
OSPF view 

ospf [ process-id 
[ router-id router-id ] ] 

Required 

Enter OSPF view. 

Enter OSPF area view 

area area-id 

— 

Configure the network 
segments in the area 

network ip-address 
wildcard-mask 

Required 

By default, an interface does not 
belong to any area. 

 

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In router ID selection, the priorities of the router IDs configured with the ospf  [ process-id 

[  router-id  router-id ] ] command, the router id command, and the priorities of the router IDs 

automatically selected are in a descending order. 

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Router IDs can be re-selected. A re-selected router ID takes effect only after the OSPF process is 

restarted. 

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The ospf [ process-id [ router-id router-id ] ] command is recommended for configuring router IDs 

manually. 

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An OSPF process ID on a router must be unique. 

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One segment can belong to only one area and you must specify each OSPF interface to belong to 

a particular area.