User's Manual

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SMCD3GN2 Wireless Cable Modem Gateway Administrator Manual
Table 15. OSPF Control Menu Options
Option Description
Interface Name A read-only field that shows the name of the interface.
OSPF Status Enables or disables OSPF.
• ENABLE = OSPF is enabled and the remaining fields on this menu, except Interface Name,
become available.
• DISABLE = OSPF is disabled. (default)
Network Type The type of network on which OSPF will be used if OSPF is enabled. Choices are:
• Broadcast = broadcast network. (default)
• Not Broadcast = not broadcast network.
• Point-to-Multipoint = point-to-multipoint network.
• Point-to-Point = point-to-point network.
Router Dead Interval Interval, in seconds, during which at least one hello packet must be received from a neighbor before
the Gateway declares that a neighbor is down. Default is 40 seconds.
Interface Cost Cost of sending a packet on an OSPF interface. Range is 1 – 65535. Default is 1.
Authentication Type The authentication mechanism used, if any. Choices are:
• No Authentication – no authentication is used. If you keep this default setting, the Authentication
Key & ID fields are gray and unavailable. (default)
• Simple Password = an authentication method where a clear text password is sent to participating
neighbors on the network. This selection sends the authenticating password over the network,
possible making it available to individuals who can access packets off the network. Do not use this
option as part of your security strategy, Rather, use it to avoid accidental changes to the routing
infrastructure. If you select this setting, the first field in the Authentication Key & ID option becomes
available for entering the password.
• MD5 = an authentication method that works much like Simple Password authentication, except
that MD5 does not send the key over the network. Instead, a router uses the MD5 algorithm to
produce a message digest of the key (also called a hash). The router sends the message digest
instead of the key itself, which ensures that no one can eavesdrop on the network and learn keys
during transmission. If you select this setting, the first field in the Authentication Key & ID option
becomes available for entering the key and the second field becomes available for entering the ID.
Authentication Key & ID Specify the appropriate information based on the Authentication Type selected:
• No Authentication – no entry required; fields are gray and unavailable. (default)
• Simple Password = in the first field, enter the clear-text password to be used for authentication.
The second field requires no entry, and is gray and unavailable.
• MD5 = in the first field, enter the MD5-hash password. In the second field, enter the Key Identifier
that identifies the key used to create the authentication data for this message.
Area ID for Cable OSPF supports two-level hierarchical routing by using OSPF areas. This approach allows the routing
table size, memory and CPU demands to be kept to a manageable levels. Each area is identified by
32-bit Area ID. This field allows the Gateway to associate packets to the appropriate OSPF area.