Nokia IPSO 4.0 manual Configuring Global Settings, 360

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„Hello interval—Length of time, in seconds, between hello packets that the router sends on the interface. For a given link, this field must be the same on all routers or adjacencies do not form. Default: 30.

„Dead interval—Number of seconds after the router stops receiving hello packets that it declares the neighbor is down. Typically, the value of this field should be four times that of the hello interval. For a given link, this value must be the same on all routers, or adjacencies do not form. The value must not be zero.

Range: 1-65535. Default: 120.

„Retransmit interval—Specifies the number of seconds between LSA retransmissions for adjacencies belonging to this interface. This value is also used when retransmitting database description and link state request packets. Set this value well above the expected round-trip delay between any two routers on the attached network. Be conservative when setting this value to prevent unnecessary retransmissions.

Range: 1-65535 in number of seconds. Default: 5.

„Auth Type—Type of authentication scheme to use for a given link. In general, routers on a given link must agree on the authentication configuration to form neighbor adjacencies. This feature guarantees that routing information is accepted only from trusted routers.

Options: None / Simple / MD5. Default: None.

5.If you selected MD5 for the auth type, you must also configure the following parameters:

„Add MD5 Key— If the Auth type selected is MD5, the Key ID and MD5 Secret fields appear. Specify the Key ID and its corresponding MD5 secret to configure a new MD5 key. If you configure multiple Key IDs, the Key ID with the highest value is used to authenticate outgoing packets. All keys can be used to authenticate incoming packets.

„Key ID—The Key ID is included in the outgoing OSPF packets to enable the receivers to use the appropriate MD5 secret to authenticate the packet.

Range: 0-255. Default: None

„MD5 Secret—The MD5 secret is included in encrypted form in outgoing packets to authenticate the packet. Range: 1-16 alphanumeric characters. Default: None

6.Click Apply.

7.To make your changes permanent, click Save.

8.Repeat this procedure on both the ABR for the discontiguous area and an ABR that connects to the backbone area.

Configuring Global Settings

Table 24 shows the global settings that you can specify for OSPF. Configure these settings by clicking OSPF under Configuration > Routing Configuration in the tree view and scrolling down to these fields.

360 Nokia Network Voyager for IPSO 4.0 Reference Guide