6.2.3.8 Lab - Configuring Multiarea OSPFv2 Final
6.2.3.8 Lab - Configuring Multiarea OSPFv2 Final
6.2.3.8 Lab - Configuring Multiarea OSPFv2 Final
Topology
Addressing Table
Objectives
Part 1: Build the Network and Configure Basic Device Settings
Part 2: Configure EIGRP and Verify Connectivity
Part 3: Configure Summarization for EIGRP
Configure EIGRP for automatic summarization.
Configure manual summarization for EIGRP.
Part 4: Configure and Propagate a Default Static Route
Part 5: Fine-Tune EIGRP
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Lab Configuring Advanced EIGRP for IPv4 Features
Background / Scenario
EIGRP has advanced features to allow changes related to summarization, default route propagation,
bandwidth utilization, metrics, and security.
In this lab, you will configure automatic and manual summarization for EIGRP, configure EIGRP route
propagation, fine-tune EIGRP metrics, and use MD5 authentication to secure EIGRP routing information.
Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) with
Cisco IOS Release 15.2(4)M3 (universalk9 image). Other routers and Cisco IOS versions can be used.
Depending on the model and Cisco IOS version, the commands available and output produced might vary
from what is shown in the labs. Refer to the Router Interface Summary Table at this end of the lab for the
correct interface identifiers.
Note: Ensure that the routers have been erased and have no startup configurations. If you are unsure,
contact your instructor.
Required Resources
3 Routers (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)
3 PCs (Windows 7, Vista, or XP with terminal emulation program, such as Tera Term)
Console cables to configure the Cisco IOS devices via the console ports
Ethernet and serial cables as shown in the topology
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Lab Configuring Advanced EIGRP for IPv4 Features
Note: This lab provides minimal assistance with the actual commands necessary to configure EIGRP.
However, the required commands are provided in Appendix A. Test your knowledge by trying to configure the
devices without referring to the appendix.
b. For the LAN interface on R1, disable the transmission of EIGRP hello packets. Write the command used
in the space below. R1(config-router) passive-interface g0/0
c. On R1, configure the bandwidth for S0/0/0 to 1024 Kb/s and the bandwidth for S0/0/1 to 64 Kb/s. Write
the commands used in the space below. Note: The bandwidth command only affects the EIGRP metric
calculation, not the actual bandwidth of the serial link.
R1(config) interface s0/0/0
R1(conifg-if) bandwith 1024
R1(config-if) interface s0/0/1
R1(config-if) bandwith 64
d. On R2, configure EIGRP routing with an AS ID of 1 for all networks, disable the transmission of EIGRP
hello packets for the LAN interface, and configure the bandwidth for S0/0/0 to 1024 Kb/s.
e. On R3, configure EIGRP routing with an AS ID of 1 for all networks, disable the transmission of EIGRP
hello packets for the LAN interface, and configure the bandwidth for S0/0/0 to 64 Kb/s.
d. On R2, issue the show ip route eigrp command. How are the loopback networks represented in the
output?
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Lab Configuring Advanced EIGRP for IPv4 Features
d. Determine the summary EIGRP route for the loopback addresses on R3. Write the summary route in the
space below.
192.168.33.0 255.255.255.240 the 192.168.33.0 are network are summarized with a /28 mask
e. For the serial interfaces on R3, issue the ip summary-address eigrp 1 network address subnet mask
command to manually summarize the networks.
R3(config)# interface s0/0/0
R3(config-if)# ip summary-address eigrp 1 192.168.33.0 255.255.255.240
R3(config-if)# exit
R3(config)# interface s0/0/1
R3(config-if)# ip summary-address eigrp 1 192.168.33.0 255.255.255.240
*Apr 14 01:33:46.433: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.13.1
(Serial0/0/0) is resync: summary configured
*Apr 14 01:33:46.433: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.23.1
(Serial0/0/1) is resync: summary configured How does the routing table on R2
change?
e. On R1, issue the show ip route eigrp | include 0.0.0.0 command to view statements specific to the
default route. How is the static default route represented in the output? What is the administrative
distance (AD) for the propagated route?
As an externally learned EIGRP route
The administrative distance is 170 as it is an externa EIGRP route
Step 2: Configure the hello interval and hold timer for EIGRP.
a. On R2, use the show ip eigrp interfaces detail command to view the hello interval and hold timer for
EIGRP.
R2# show ip eigrp interfaces detail
EIGRP-IPv4 Interfaces for AS(1)
Xmit Queue PeerQ Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se0/0/0 1 0/0 0/0 1 0/15 50 0
Hello-interval is 5, Hold-time is 15
Split-horizon is enabled
Next xmit serial <none>
Packetized sent/expedited: 29/1
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Lab Configuring Advanced EIGRP for IPv4 Features
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Lab Configuring Advanced EIGRP for IPv4 Features
a. Apply the following commands to active EIGRP authentication on the serial interfaces on R1.
R1# conf t
R1(config)# interface s0/0/0
R1(config-if)# ip authentication key-chain eigrp 1 EIGRP-KEYS
R1(config-if)# ip authentication mode eigrp 1 md5
R1(config-if)# interface s0/0/1
R1(config-if)# ip authentication key-chain eigrp 1 EIGRP-KEYS
R1(config-if)# ip authentication mode eigrp 1 md5
b. Activate EIGRP authentication on the serial interfaces on R2 and R3.
c. On R2, use the show ip eigrp interfaces detail command to verify authentication.
R2# show ip eigrp interfaces detail
EIGRP-IPv4 Interfaces for AS(1)
Xmit Queue PeerQ Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se0/0/0 1 0/0 0/0 1 0/23 50 0
Hello-interval is 60, Hold-time is 180
Split-horizon is enabled
Next xmit serial <none>
Packetized sent/expedited: 30/5
Hello's sent/expedited: 1163/5
Un/reliable mcasts: 0/0 Un/reliable ucasts: 25/34
Mcast exceptions: 0 CR packets: 0 ACKs suppressed: 0
Retransmissions sent: 0 Out-of-sequence rcvd: 0
Topology-ids on interface - 0
Authentication mode is md5, key-chain is "EIGRP-KEYS"
Se0/0/1 1 0/0 0/0 2 0/15 50 0
Hello-interval is 60, Hold-time is 180
Split-horizon is enabled
Next xmit serial <none>
Packetized sent/expedited: 31/1
Hello's sent/expedited: 1354/3
Un/reliable mcasts: 0/0 Un/reliable ucasts: 28/34
Mcast exceptions: 0 CR packets: 0 ACKs suppressed: 4
Retransmissions sent: 0 Out-of-sequence rcvd: 0
Topology-ids on interface - 0
Authentication mode is md5, key-chain is "EIGRP-KEYS"
Reflection
1. What are the benefits of summarizing routes?
Summarization can be used to limit the number of routing advertisements and the size of the routing
tables
2. When setting EIGRP timers, why is it important to make the hold time value equal to or greater than the hello
interval?
IF the hold time is less than the hello interval, the neighbor adjacency will go down
Unauthenticated router updates create a security risk, Attackers could inject false route information into
router updates to redirect traffic to create routing loops or to send traffic across unsecure links
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Lab Configuring Advanced EIGRP for IPv4 Features
Router Model Ethernet Interface #1 Ethernet Interface #2 Serial Interface #1 Serial Interface #2
1800 Fast Ethernet 0/0 Fast Ethernet 0/1 Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
(F0/0) (F0/1)
1900 Gigabit Ethernet 0/0 Gigabit Ethernet 0/1 Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
(G0/0) (G0/1)
2801 Fast Ethernet 0/0 Fast Ethernet 0/1 Serial 0/1/0 (S0/1/0) Serial 0/1/1 (S0/1/1)
(F0/0) (F0/1)
2811 Fast Ethernet 0/0 Fast Ethernet 0/1 Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
(F0/0) (F0/1)
2900 Gigabit Ethernet 0/0 Gigabit Ethernet 0/1 Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
(G0/0) (G0/1)
Note: To find out how the router is configured, look at the interfaces to identify the type of router and how many
interfaces the router has. There is no way to effectively list all the combinations of configurations for each router
class. This table includes identifiers for the possible combinations of Ethernet and Serial interfaces in the device.
The table does not include any other type of interface, even though a specific router may contain one. An
example of this might be an ISDN BRI interface. The string in parenthesis is the legal abbreviation that can be
used in Cisco IOS commands to represent the interface.
Router R2
R2(config)# router eigrp 1
R2(config-router)# network 192.168.2.0
R2(config-router)# network 192.168.12.0 0.0.0.3
R2(config-router)# network 192.168.23.0 0.0.0.3
R2(config-router)# passive-interface g0/0
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Lab Configuring Advanced EIGRP for IPv4 Features
Router R3
R3(config)# router eigrp 1
R3(config-router)# network 192.168.3.0
R3(config-router)# network 192.168.13.0 0.0.0.3
R3(config-router)# network 192.168.23.0 0.0.0.3
R3(config-router)# network 192.168.33.0 0.0.0.3
R3(config-router)# network 192.168.33.4 0.0.0.3
R3(config-router)# network 192.168.33.8 0.0.0.3
R3(config-router)# network 192.168.33.12 0.0.0.3
R3(config-router)# passive-interface g0/0
R3(config)# int s0/0/0
R3(config-if)# bandwidth 64
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Lab Configuring Advanced EIGRP for IPv4 Features
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