| Parameter | Description |
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| Router Id | The switch IP that is used as the OSPF Router ID. |
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| Area ID Configuration | Defines an area within which all OSPF routers actively |
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| exchange routing information to ensure that they all have an |
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| identical link state database. |
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| OSPF Area Range | Defines a range of subnetwork addresses. An area range is |
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| Configuration | used to summarize route information exchanged between Area |
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| Border Routers. |
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| OSPF Virtual Link | Defines a virtual link that can be used to connect an OSPF area |
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| Configuration | not physically adjacent to the OSPF backbone, or to create a |
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| backup link to any area. |
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| OSPF Host Route | Configures the route to a specific host within the area. |
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| Configuration |
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OSPF Area Configuration
OSPF protocol broadcast messages (i.e., Link State Advertisements) are restricted by area to limit their impact on network performance. Before assigning an Area ID to a specific OSPF interface (see chapter 2 “Configuring OSPF”), you must first specify the Area ID in this table. Each entry in this table identifies a logical group of OSPF routers that actively exchange Link State Advertisements (LSAs) to ensure that they share an identical view of the network topology. You can configure the area as a normal one which can send and receive external Link State Advertisements (LSAs), a stubby area that cannot send or receive external LSAs, or a
IP Menu: OSPF Area Configuration
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Area ID |
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192.168.2.0 |
| NORMAL |
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192.168.3.0 | NORMAL |
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Parameter |
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Area ID |
| An OSPF area identifier configured for a group of OSPF routers. |
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| (For information on how to assign this identifier to a specific |
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| interface, see chapter 2 “Configuring OSPF”.) |
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