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Area Type: From the drop-down list, choose the type of OSPF area to associate with the advertising interface. The area type configured here must match the area type of the upstream router configuration. Choose one of the following supported area types:
NSSA (Not-so-stubby Area): A NSSA (not-so-stubby area) imports autonomous system (AS) external routes and sends them to the backbone, but it cannot receive AS external routes from the backbone or other areas.
Standard: A standard area has no restrictions on routing advertisements, and it connects to the backbone area (Area 0) and accepts both internal and external link-state advertisements.
Stub: A stub area is an area that does not receive external routes.
Area ID: Enter the OSPF area identifier of the network containing the upstream routers, in either an IP address format or a decimal format. All network devices configured with the same OSPF area ID belong to the same OSPF area. You can enter the area ID in dotted decimal notation similar to an IP address, such as 192.1680. 172.33. You can also enter the Area ID as a decimal equivalent, so Area 261 is the same as Area 0.0.
Advertising Interface: Enter the interface that sends out OSPF routing advertisement.
Authentication Type: Choose the authentication method to use to verify OSPF routing advertisements on the interface. The authentication type configured here must match the authentication type of the upstream router configuration. Choose one of the following supported authentication types:
Clear: A simple password for OSPF advertisement authentication, in clear text.
MD5: An MD5 hash algorithm to authenticate OSPF advertisements. This is the most secure option.
Key: Enter the key identifier to use to specify the correct hash algorithm after you select MD5 as your OSPF authentication type. The authentication key ID configured here must match the authentication key ID of the upstream router configuration.
Cost: Use the up/down arrow or enter a value to determine the cost associated with the OSPF advertisement interface. You can calculate the cost as 100,000,000 (reference bandwidth) divided by the interface bandwidth. For example, a 100Mb interface has a cost of 1, and a 10Mb interface has a cost of 10.
Hello Interval(s): Use the up/down arrow or enter a value to specify how often to send OSPF hello advertisements from the advertisement interface, in seconds. Specify any number from 1 through 65,535. The default value is 10 seconds. The hello interval configured here must match the hello interval of the upstream router configuration.
Dead interval(s): Use the up/down arrow or enter a value to specify how long to wait before declaring the NIOS-X server as unavailable and down, in seconds. Specify any number from 1 through 65,535. The default value is 40 seconds. The dead interval configured here must match the dead interval of the upstream router configuration.
Retransmit Interval(s): Use the up/down arrow or enter a value to specify how long to wait before retransmitting OSPF advertisements from the interface, in seconds. Specify any number from 1 through 65,535. The default value is 5 seconds. The retransmit interval configured here must match the retransmit interval of the upstream router configuration.
Transmit Delay(s): Use the up/down arrow or enter a value to specify how long to wait before sending an advertisement from the interface, in seconds. Specify any number from 1 through 65,535. The default value is 1 second. The transmit interval configured here must match the transmit interval of the upstream router configuration.
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