route and use RIP to propagate this default
information to other routers. Lab Activity e-Lab
Activity: Configuring Default Routing with RIP and IGRP In this
lab, the students will configure a default route and use RIP to
propagate this default information to other routers. Web
Links Configuring RIP http://www.cisco.com/en/US/products/sw/ iosswrel/ps183
1/ products_configuration_guide_
chapter09186a00800d97f7.html#xtocid13
Content 7.3
IGRP 7.3.7 Verifying IGRP
configuration To verify that IGRP has been configured
properly, enter the show ip route command and look for
IGRP routes signified by an "I".Additional commands
for checking IGRP configuration are as follows:
- show interface interface
- show
running-config
- show running-config
interface interface
- show running-config
| begin interface interface
- show
running-config | begin igrp
- show ip
protocols
To verify that the Ethernet interface
is properly configured, enter the show interface fa0/0
command. Figure illustrates the output. To see if IGRP is
enabled on the router, enter the show ip protocols
command. Figure illustrates the output. The commands
illustrated in Figures verify the network statements, IP
addressing, and routing tables. Lab Activity e-Lab
Activity: Verifying IGRP Configuration In this lab, the
students will use IOS show commands to verify the operation of
a router running IGRP. Lab Activity e-Lab Activity:
IGRP In this lab, the students will set up dynamic routing
between networks using IGRP. Web Links Configuring IGRP
http://www.cisco.com/en/US/products/sw/ iosswrel/ps1831/
products_ onfiguration_guide_ chapter09186a00800d97f6.html
Content 7.3 IGRP 7.3.8
Troubleshooting IGRP Most IGRP configuration errors involve
a mistyped network statement, discontiguous subnets, or an
incorrect Autonomous System Number.The following commands are
useful when troubleshooting IGRP: - show ip
protocols
- show ip route
- debug
ip igrp events
- debug ip igrp
transactions
- ping
- traceroute
Figure illustrates output from
debug ip igrp events command. Figure illustrates output
from debug ip igrp transactions command. It is
discovered that the wrong AS number was being used, correcting
it results in the output in Figure . Lab Activity Lab
Exercise: Unequal Cost Load Balancing with IGRP This lab is to
observe unequal-cost load balancing and tune IGRP networks by
using advanced debug commands. Web Links Configuring
IGRP http://www.cisco.com/en/US/products/sw/ iosswrel/ps1831/
products_ onfiguration_guide_ chapter09186a00800d97f6.html
Content Summary An understanding of the following
key points should have been achieved: - How routing
information is maintained through distance vector
protocols
- How routing loops occur in distance
vector
- Defining a maximum to prevent count to
infinity
- Eliminating routing loops through split
horizon
- Route poisoning
- Avoiding routing
loops with triggered updates
- Preventing routing loops
with holddown timers
- Preventing routing updates
through an interface
- Load balancing across multiple
paths
- RIP process
- Configuring RIP
- Using the ip classless command
- Common RIP
configuration issues
- Load balancing with RIP
- Integrating static routes with RIP
- Verifying RIP
configuration
- IGRP features
- IGRP
metrics
- IGRP routes
- IGRP stability
features
- Configuring IGRP
- Migrating RIP to
IGRP
- Verifying IGRP configuration
- Troubleshooting IGRP