Thursday, April 18, 2013

CCNA Exploration 2: PT Practice SBA OSPF - Routing Protocols and Concepts v4.0 Answers 2013-2014

ERouting OSPF PT Practice SBA :

A few things to keep in mind while completing this activity:
1.  Do not use the browser Back button or close or reload any exam windows during the
2.  Do not close Packet Tracer when you are done. It will close automatically.

3.  Click the Submit Assessment button to submit your work.

In this practice Packet Tracer Skills Exam, you will:

  • finish the configuration of a partially configured network 
  • establish connectivity to the UK and the Internet through the use of static and dynamic routing 

Addressing Table

Note: The password for user EXEC mode is cisco. The password for privileged EXEC mode is class.

Step 1: Finish the IP Addressing. 
Note: Initially, you can only access router US-R2 through the console connection on US-
a.     Configure and verify interface addressing on US-R2.
         Configure and activate all interfaces for US-R2 that are listed in the
addressing table.
b.    Configure the correct IP addresses on US-PC2 and US-R1.
         Configure US-PC2 with the last IP address in the subnet.
         Configure the Fa0/1 interface on US-R1 with the last IP address in the
c.     Verify connectivity.

Step 2: Discover the Network.
  Explore the network to determine the IP addressing of the serial interfaces that US-
HQ shares with US-R1 and US-R2.
  Remotely access US-HQ. US-R1# telnet

Step 3: Configure Static and Default Routing. 
a.     Configure connectivity to the UK.

  • Using the next hop address, configure one summary static route on US-HQ to include only the subnets used and reserved for the UK. The UK subnets are listed in the following table: 

 HQ(config)# ip route

  • Configure a default route on US-HQ to send to the Internet all other traffic for destinations that are not found in the US-HQ routing table. Use the outbound interface argument. 

HQ(config)# ip route S0/1/0 
b.    Verify static and default routing.
Step 4: Configure OSPF Routing.
a.     Configure OSPF on US-HQ, US-R1, and US-R2.
         Use OSPF process ID 3 and area 0.
         Advertise each subnet individually with its corresponding wildcard mask. On US-HQ, do not advertise the subnet to the Internet or the subnet to UK.

HQ(config)# router ospf 3 
HQ(config-router)# network area 0 
HQ(config-router)# network area 0 

US-R1 (config)# router ospf 3 
US-R1 (config-router)# network area 0 
US-R1 (config-router)# network area 0 
US-R1 (config-router)# network area 0 

US-R2 (config)# router ospf 3 
US-R2 (config-router)# network area 0 
US-R2 (config-router)# network area 0 
US-R2 (config-router)# network area 0 

         Disable OSPF updates out interfaces where there are no OSPF
neighbors available.

HQ(config-router)# passive-interface s0/1/0 
HQ(config-router)# passive-interface s0/1/1 
US-R1 (config-router)# passive-interface fa0/0 
US-R2 (config-router)# passive-interface fa0/0 

         Configure US-HQ to send the default route to US-R1 and US-R2 in
OSPF updates.

HQ(config-router)# default-information originate 

b.    Modify the default OSPF operation.
         Configure US-R1 to always be the DR by using a priority of 150.
Pour   Fa0/1 , S0/0 
US-R1 (config-if)# ip ospf priority 150
         Configure US-R2 to always be the BDR by using a priority of 75.
Pour   Fa0/1 , S0/0 
US-R2 (config-if)# ip ospf priority 75
         Change the hello interval to 30 seconds on US-R1 and US-R2 for the
LAN that these two routers share with ServerLAN.
US-R1 (config-if)# ip ospf hello-interval 30 
US-R2 (config-if)# ip ospf hello-interval 30 
         Verify OSPF neighbor status.
US-R1# show ip ospf neighbor
c.     Verify that OSPF is fully operational.
         Verify that the routing tables on US-R1, US-R2, and US-HQ contain all
the expected routes. It may be necessary to shutdown and then
reactivate interfaces to force OSPF to converge.
US-R1# show ip route 

Step 5: Verify Full Connectivity. 

Although these are not scored, the following connectivity tests should be successful.
  To test the static route to UK, successfully ping between US-HQ and UK-PC1.
  To test the OSPF neighbor establishment with ServerLAN, successfully ping between
US-Admin and
  To test end-to-end connectivity between the US and UK, successfully ping between
US-PC2 and UK-PC3.

  To test the default route, successfully ping the Cisco Server from US-Admin.



cisco enable class config ter
interface fa0/0

ip add no shutdown

inteface fa0/1

ip add no shutdown

interface s0/0/0

ip add no shutdown

inteface Lo0

ip add no shutdown

router ospf 3

network area 0 network area 0 network area 0 passive-interface fastEternet 0/0

interface s0/0/0

ip ospf priority 75 exit

interface f0/1

ip ospf priority 75 exit

inteface f0/1

ip ospf hello-interval 30 end

show ip route




cisco enable class

show ip route

conf term

ip route ip route s0/1/0

router ospf 3

network area 0 network area 0 default-information originate passive-interface s0/1/0
passive interface s0/1/1


show ip route


Open US-R1


cisco enable class

config term

interface fa0/1

ip add no shutdown

router ospf 3

network area 0 network area 0 network area 0

passive-interface fa0/0 exit
do wr

interface f0/1
ip ospf priority 150

ip ospf hello-interval 30


interface s0/0/0

ip ospf priority 150 exit

show ip route





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Have Fun!!

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