Static Route Advertisement
Disabled
Enables or disables advertisement of static routes.
Configuring Global Settings for OSPF
To implement OSPF for a large network, you must first organize the network into logical areas to limit the number of OSPF routers that actively exchange Link State Advertisements (LSAs). You can then define an OSPF interface by assigning an IP interface configured on this switch to one of these groups. This OSPF interface will send and receive OSPF traffic to neighboring OSPF routers.
You can further optimize the exchange of OSPF traffic by specifying an area range that covers a large number of subnetwork addresses. This is an important technique for limiting the amount of traffic exchanged between Area Border Routers (ABRs).
And finally, you must specify a virtual link to any OSPF area that is not physically attached to the OSPF backbone. Virtual links can also be used to provide a redundant link between contiguous areas to prevent areas from being partitioned, or to merge backbone areas.
The following menu items provide all the global configuration options for OSPF:
| Parameter | Description |
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| Area ID | Defines a area within which all OSPF routers actively exchange |
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| Configuration | routing information to ensure that they all have an identical link |
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| state database. |
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| OSPF Area Range | Defines a range of subnetwork addresses. An area range is used |
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| Configuration | to summarize route information exchanged between Area Border |
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| 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 |
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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 3 “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
