Configuring Ospf - Cisco ONS 15454 Software Feature And Configuration Manual
Sonet / sdh ml-series multilayer ethernet card
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Chapter 10
Configuring Networking Protocols
In general, disabling split horizon is not recommended unless you are certain that your application
Note
requires it to properly advertise routes.
If you want to configure an interface running RIP to advertise a summarized local IP address pool on a
network access server for dial-up clients, use the ip summary-address rip interface configuration
command.
If split horizon is enabled, neither autosummary nor interface IP summary addresses are advertised.
Note
Beginning in privileged EXEC mode, follow these steps to set an interface to advertise a summarized
local IP address pool and to disable split horizon on the interface:
Command
Step 1
Router# configure terminal
Step 2
Router(config)# interface
interface-id
Step 3
Router(config-if)# ip address
ip-address subnet-mask
Step 4
Router(config-if)# ip
summary-address rip ip address
ip-network mask
Step 5
Router(config-if)# no ip split
horizon
Step 6
Router(config-if)# end
Step 7
Router# show ip interface
interface-id
Step 8
Router# copy running-config
startup-config
To disable IP summarization, use the no ip summary-address rip router configuration command.
If split horizon is enabled, neither autosummary nor interface summary addresses (those configured with
Note
the ip summary-address rip router configuration command) are advertised.
Configuring OSPF
This section briefly describes how to configure Open Shortest Path First (OSPF) Protocol. For a
complete description of the OSPF commands, refer to the "OSPF Commands" chapter of the Cisco IOS
IP and IP Routing Command Reference publication.
OSPF is an IGP designed expressly for IP networks, supporting IP subnetting and tagging of externally
derived routing information. OSPF also allows packet authentication and uses IP multicast when sending
and receiving packets. The Cisco implementation supports RFC 1253, the OSPF Management
Information Base (MIB).
The Cisco implementation conforms to the OSPF Version 2 specifications with these key features:
Cisco ONS 15454 SONET/SDH ML-Series Multilayer Ethernet Card Software Feature and Configuration Guide, R4.0
78-15224-02
Purpose
Enters global configuration mode.
Enters interface configuration mode, and specifies the
Layer 3 interface to configure.
Configures the IP address and IP subnet.
Configures the IP address to be summarized and the IP
network mask.
Disables split horizon on the interface.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
Configuring IP Routing
10-9
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