# address authentication key

#### Syntax

address { ipAddress | unnumbered interfaceType interfaceSpecifier }
authentication key [ 0 | 8 ] authkey

no address [ ipAddress | unnumbered interfaceType interfaceSpecifier ]
authentication key

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Specifies the password for text authentication and the key for MD5 authentication. The no version clears the key for the interface. Supported only in RIP version 2. Authentication is disabled by default.

#### Options

- ipAddress—Address of IP interface where RIP will be run
- unnumbered—Specifies that RIP will be run on an unnumbered interface
  - interfaceType—Interface type; see Interface Types and Specifiers
  - interfaceSpecifier—Particular interface; format varies according to interface type; see Interface Types and Specifiers
- 0—Indicates the authKey is entered in unencrypted form (plaintext); this is the default option
- 8—Indicates the authKey is entered in encrypted form (ciphertext)
- authkey—Password sent with RIP messages or the key used to encrypt/decrypt RIP messages, depending on the authentication mode set for this interface

#### Mode

Address Family Configuration, Router Configuration