CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

114 Switching Basics and Intermediate Routing CCNA 3 Labs and Study Guide
40. Document the command that needs to be configured on RTA to fix this problem.
RTA(config-router)#default-information originate
Note: Now is a good time to complete Curriculum Lab 2-6: Propagating Default Routes in an OSPF Domain (2.3.6).
DR/BDR Election Exercise
In the following exercises, assume that all routers are simultaneously booted. Determine the network type,
if applicable, and label which router is elected as the DR and which router is elected as the BDR.
Hint: Remember, if priority is equal, router ID determines DR and BDR.
Refer to Figure 2-7 and answer the following questions:
Figure 2-7 DR/BDR Election Exercise 1 Topology
E0 = 172.16.1.1
L0 = 192.168.1.4
RTA
What is the router ID for RTA? 192.168.1.4
What is the router ID for RTB? 192.168.1.3
What is the router ID for RTC? 192.168.1.2
What is the router ID for RTD? 192.168.1.1
Which router will be elected DR? RTA
Which router will be elected BDR? RTB
RTC
E0 = 172.16.1.3
S0 = 192.168.5.1
L0 = 192.168.1.2
Refer to Figure 2-8 and determine whether there will be a DR/BDR election. If applicable, designate
which router is DR and which router is BDR.
Figure 2-8 DR/BDR Election Exercise 2 Topology
E0 = 172.16.1.2
L0 = 192.168.1.3
RTB
The loopback address is the router ID in every case
172.15.1.2/30
S0
Fa0
172.16.1.2/24
Router ID
172.15.1.1/30
S0
Fa1
172.16.1.1/24
RTA
Router ID
172.18.1.2/30
S1
Fa0
172.17.1.1/24
Router ID
RTD
E0 = 172.16.1.4
S0 = 192.168.5.2
L0 = 192.168.1.1
Router ID
172.18.1.1/30
S0
RTD RTB
RTC
Fa0
172.17.1.2/24