Cisco Systems 78-11741-02 Wireless Office Headset User Manual


 
Configuring Routing Information Protocol
RIP Configuration Task List
IPC-205
Cisco IOS IP Configuration Guide
Restrictions to RIP Route Summarization
Supernet advertisement (advertising any network prefix less than its classful major network) is not
allowed in RIP route summarization, other than advertising a supernet learned in the routing tables.
Supernets learned on any interface that is subject to configuration are still learned. For example, the
following summarization is invalid:
interface E1
.
.
.
ip summary-address rip 10.0.0.0 252.0.0.0 (invalid supernet summarization)
Each route summarization on an interface must have a unique major net, even if the subnet mask is
unique. For example, the following is not permitted:
interface Ethernet1
.
.
.
ip summary-address rip 10.1.0.0 255.255.0.0
ip summary-address rip 10.2.0.0 255.255.0.0 (or different mask)
Note The ip summary-address eigrp router configuration command uses other options that are not
applicable to RIP. Do not confuse Enhanced IGRP (EIGRP) summary address with the new RIP
command, ip summary-address rip.
Configuring Route Summarization on an Interface
The ip summary-address rip router configuration command causes the router to summarize a given set
of routes learned via RIP Version 2 or redistributed into RIP Version 2. Host routes are especially
applicable for summarization. To configure IP summary addressing, use the following commands
beginning in global configuration mode:
See the “Route Summarization Examples” section at the end of this chapter for examples of using split
horizon.
Verifying IP Route Summarization
You can verify which routes are summarized for an interface using the show ip protocols EXEC
command. The following example shows potential summarizations and the associated interface
summary address and network mask for Ethernet interface 2:
router# show ip protocols
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 8 seconds
Command Purpose
Step 1
Router(config)# interface ethernet1
Enters interface configuration mode for the ethernet 1
port.
Step 2
Router(config-if)# ip summary-address rip ip_address
ip_network_mask
Specifies the IP address and network mask that
identify the routes to be summarized.