Users Guide

Layer 3 Routing Commands 1683
area virtual-link authentication
Use the area virtual-link authentication command in Router OSPF
Configuration mode to configure the authentication type and key for the
OSPF virtual interface identified by the area ID and neighbor ID. Use the no
form of the command to return the authentication type to the default value.
Syntax
area area-id virtual-link neighbor-id authentication [none | simple key |
encrypt key key-id]
no area area-id virtual-link neighbor-id authentication
• area-id — Identifies the OSPF area to configure. (Range: IP address or
decimal from 0–4294967295)
• neighbor-id — Identifies the Router identifier of the neighbor.
• encrypt — Use MD5 Encryption for an OSPF Virtual Link.
• key — Authentication key for the specified interface. (Range: 8 bytes or
less if the authentication type is simple and 16 bytes or less if the type is
encrypt.)
• key-id — Authentication key identifier for the authentication type
encrypt. (Range: 0–255)
Default Configuration
This command has no default configuration.
Command Mode
Router OSPF Configuration mode.
User Guidelines
Unauthenticated interfaces cannot be configured with an authentication key.
If no parameters are specified after the authentication keyword, then plain-
text password authentication is used.
Example
The following example configures the authentication type and key for the
area 10 OSPF virtual interface and neighbor ID.