Chapter 29
| IP Routing Commands
Routing Information Protocol (RIP)
– 830 –
ip rip authentication
mode
This command specifies the type of authentication that can be used for RIPv2
packets. Use the no form to restore the default value.
Syntax
ip rip authentication mode {md5 | text}
no ip rip authentication mode
md5 - Message Digest 5 (MD5) authentication
text - Indicates that a simple password will be used.
Default Setting
Text authentication
Command Mode
Interface Configuration (VLAN)
Command Usage
◆ The password to be used for authentication is specified in the ip rip
authentication string command.
◆ This command requires the interface to exchange routing information with
other routers based on an authorized password. (Note that this command only
applies to RIPv2.)
◆ For authentication to function properly, both the sending and receiving
interface must be configured with the same password or authentication key.
◆ MD5 is a one-way hash algorithm is that takes the authentication key and
produces a 128 bit message digest or “fingerprint.” This makes it
computationally infeasible to produce two messages having the same message
digest, or to produce any message having a given pre-specified target message
digest.
Example
This example sets the authentication mode to plain text.
Console(config)#interface vlan 1
Console(config-if)#ip rip authentication mode text
Console(config-if)#
Related Commands
ip rip authentication string (831)
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