10-8
Cisco ONS 15454 SONET/SDH ML-Series Multilayer Ethernet Card Software Feature and Configuration Guide, R4.0
78-15224-02
Chapter 10 Configuring Networking Protocols
Configuring IP Routing
Router# show ip rip database
192.168.1.0/24 auto-summary
192.168.1.0/24
[1] via 192.168.2.1, 00:00:24, POS0
192.168.2.0/24 auto-summary
192.168.2.0/24 directly connected, POS0
192.168.3.0/24 auto-summary
192.168.3.0/24 directly connected, FastEthernet0
RIP Authentication
RIP Version 1 does not support authentication. If you are sending and receiving RIP Version 2 packets,
you can enable RIP authentication on an interface. The key chain determines the set of keys that can be
used on the interface. If a key chain is not configured, no authentication is performed, not even the
default.
The switch supports two modes of authentication on interfaces for which RIP authentication is enabled:
plain text and MD5. The default is plain text.
Beginning in privileged EXEC mode, follow these steps to configure RIP authentication on an interface:
To restore clear text authentication, use the no ip rip authentication mode interface configuration
command. To prevent authentication, use the no ip rip authentication key-chain interface
configuration command.
Summary Addresses and Split Horizon
Routers connected to broadcast-type IP networks and using distance-vector routing protocols normally
use the split-horizon mechanism to reduce the possibility of routing loops. Split horizon blocks
information about routes from being advertised by a router on any interface from which that information
originated. This feature usually optimizes communication among multiple routers, especially when links
are broken.
Command Purpose
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# interface
interface-id
Enters interface configuration mode, and specifies the
interface to configure.
Step 3
Router(config-if)# ip rip
authentication key-chain
name-of-chain
Enables RIP authentication.
Step 4
Router(config-if)# ip rip
authentication mode {text | md5}
Configures the interface to use plain text
authentication (the default) or MD5 digest
authentication.
Step 5
Router(config-if)# end
Returns to privileged EXEC mode.
Step 6
Router# show running-config interface
[
interface-id
]
Verifies your entries.
Step 7
Router# copy running-config
startup-config
(Optional) Saves your entries in the configuration file.
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