Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual page 241

ip rip authentication key
ip rip authentication mode
ip rip receive version
ip rip send version
Use to specify either the simple password for text authentication or the
encryption/decryption key for MD5 authentication. The key is a string of up to
16 alphanumeric characters and can be mixed uppercase and lowercase.
You can specify whether the key is entered in unencrypted or encrypted format.
If you do not specify which, the string is assumed to be unencrypted.
Example
host1(config-if)#ip rip authentication key ke6G72mV
Use the no version to clear all authentication keys.
See ip rip authentication key
Use to specify the authentication mode.
Specify text to send a simple text password to neighbors. If a neighbor does not
have the same password, requests and updates from this router are rejected.
Specify md5 keyID to send an MD5 hash to neighbors. Neighbors must share
the MD5 key to decrypt the message and encrypt the response.
Example
host1(config-if)#ip rip authentication mode text
Use the no version to remove authentication from all RIP interfaces.
See ip rip authentication mode
Use to restrict the RIP version that the router can receive on an interface. The
default is both RIPv1 and RIPv2.
Example
host1(config-if)#ip rip receive version 1
Use the no version to restore the default value, 1 2.
See ip rip receive version
Use to restrict the RIP version that the router can send on an interface. The
default is RIPv1.
Example
host1(config-if)#ip rip send version 2
Use the no version to restore the default value, 1.
See ip rip send version
Chapter 4: Configuring RIP
217
Configuration Tasks