Enabling Authentication with MD5 Authentication (CLI Procedure)
To configure authentication that requires an MD5 password to be included in the transmitted packet, enable MD5 authentication by performing these steps on all RIP devices in the network:
- Navigate to the top of the configuration hierarchy.
- Perform the configuration tasks described in Table 1.
- If you are finished configuring the router, commit the configuration.
Table 1: Configuring MD5 RIP Authentication
CLI Configuration Editor
Navigate to Rip level in the configuration hierarchy.
From the  hierarchy level, enter
edit protocols rip
Set the authentication type to MD5.
Set the authentication type to md5:
set authentication-type md5
Set the MD5 authentication key (password).
The key can be from 1 through 16 contiguous characters long and can include any ASCII strings.
Set the MD5 authentication key:
set authentication-key password