If you con?¬?gure
the global service password-encryption command, the key is stored and displayed in an
encrypted form; when it is displayed, an encryption type of 7 is speci?¬?ed before the encrypted
key.
Table 4-6 ip ospf authentication Command Parameters
Parameter Description
message-digest (Optional) Speci?¬?es that MD5 authentication will be used.
null (Optional) No authentication is used. This option is useful for overriding
password or MD5 authentication if con?¬?gured for an area.
158 Chapter 4: Single-Area OSPF Implementation
The ip ospf authentication command was introduced in Cisco IOS
Release 12.0. For backward compatibility, the authentication type for an
area is still supported. If the authentication type is not speci?¬?ed for an
interface, the authentication type for the area is used. (The area default is
null authentication.) To enable authentication for an OSPF area, use the
area area-id authentication [message-digest] router con?¬?guration
command. Table 4-7 explains the parameters for this command.
Example: Plaintext Password Authentication Con?¬?guration
Figure 4-7 shows the network that is used to illustrate the con?¬?guration, veri?¬?cation, and
troubleshooting of plaintext password authentication.
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