CCNP Route Lab 3-5, OSPF Challenge Lab
Topology
Objectives
- Implement the topology diagram following the instructions in the Configuration Requirements section.
Required Resources
- 4 routers (Cisco 1841 with Cisco IOS Release 12.4(24)T1 Advanced IP Services or comparable)
- Serial and console cables
Note: This lab uses Cisco 1841 routers with Cisco IOS Release 12.4(24)T1 and the Advanced IP Services image c1841 -advipservicesk9-mz.124-24.T1 .bin. You can use other routers (such as 2801 or 2811) and Cisco IOS Software versions if they have comparable capabilities and features. Depending on the router model and Cisco IOS Software version, the commands available and output produced might vary from what is shown in this lab.
Configuration Requirements
- Configure the interfaces in the diagram with the IP addresses shown.
- Configure the bandwidth to reflect the actual bandwidth of all serial links.
- Configure OSPF with interfaces in the areas shown in the diagram.
- Configure R2 to summarize area 20 with the most specific mask possible.
- Make the link between R1 and R2 have the OSPF network type of broadcast, with R1 as the DR.
- Configure R1 to always originate a default route.
- Modify the link between R2 and R3 to have hello timers and dead timers that are double the default values.
- Make the link between R2 and R3 have a cost of 500.
- Configure area 34 to be a totally stubby area.
- Use MD5 authentication with the keyword “cisco” over the link between R3 and R4.
- Figure out the hidden issue in the topology that you need to address to have full connectivity.
- Run a Tcl script on all routers to verify that there is connectivity between the IP addresses in the topology.
Notes: ______________________________________________________________________________
Router Interface Summary Table
| Router Interface Summary | ||||
| Router Model | Ethernet Interface #1 |
Ethernet Interface #2 |
Serial Interface #1 |
Serial Interface #2 |
| 1700 | Fast Ethernet 0 (Fa0) |
Fast Ethernet 1 (Fa1) |
Serial 0 (S0) | Serial 0/0/1 (S0/0/1) |
| 1800 | Fast Ethernet 0/0 (Fa0/0) |
Fast Ethernet 0/1 (Fa0/1) |
Serial 0/0/0 (S0/0/0) |
Serial 0/0/1 (S0/0/1) |
| 2600 | Fast Ethernet 0/0 (Fa0/0) |
Fast Ethernet 0/1 (Fa0/1) |
Serial 0/0 (S0/0) | Serial 0/1 (S0/1) |
| 2800 | Fast Ethernet 0/0 (Fa0/0) |
Fast Ethernet 0/1 (Fa0/1) |
Serial 0/0/0 (S0/0/0) |
Serial 0/0/1 (S0/0/1) |
| 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. Rather than list all 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 might contain one. For example, for an ISDN BRI interface, the string in parenthesis is the legal abbreviation that can be used in Cisco IOS commands to represent the interface. | ||||
Explanation of Selected Requirements – Instructor Version
The requirement to address a hidden issue in the topology to have full connectivity means that you must build
a virtual link across area 23 to have area 34 connected to the backbone.
TCL Script
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
R1# <b>tclsh</b> R1(tcl)# <b>foreach address {</b> <b>172.16.1.1</b> <b>172.16.2.1</b> <b>172.16.2.33</b> <b>172. 16.2.65</b> <b>172.16.2.97</b> <b>172.16.3.1</b> <b>172.16.4.1</b> <b>172.16.12.1</b> <b>172.16.12.2</b> <b>172.16.23.2</b> <b>172.16.23.3</b> <b>172.16.34.3</b> <b>172.16.34.4</b> <b>} {</b> <b>ping $address }</b> R1(tcl)# <b>tclquit</b> <b></b> |
Device Configurations (Instructor version)
Router R1
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
hostname R1 ! interface Loopback0 ip address 172. 16.1.1 255.255.255.0 ! interface Serial0/0/0 ip address 172.16.12.1 255.255.255.0 ip ospf network broadcast ip ospf priority 10 clock rate 64000 bandwidth 64 no shutdown ! router ospf 1 log-adjacency-changes network 172.16.1.0 0.0.0.255 area 0 network 172.16.12.0 0.0.0.255 area 0 default-information originate always end <b></b> |
Router R2
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
hostname R2 ! interface Loopback0 ip address 172.16.2.1 255.255.255.224 ! interface Loopback1 ip address 172.16.2.33 255.255.255.224 ! interface Loopback2 ip address 172.16.2.65 255.255.255.224 ! interface Loopback3 ip address 172.16.2.97 255.255.255.224 ! interface Serial0/0/0 ip address 172.16.12.2 255.255.255.0 ip ospf network broadcast bandwidth 64 no shutdown ! interface Serial0/0/1 ip address 172.16.23.2 255.255.255.0 ip ospf cost 500 ip ospf hello-interval 20 ip ospf dead-interval 80 clock rate 64000 bandwidth 64 no shutdown ! router ospf 1 area 20 range 172.16.2.0 255.255.255.128 area 23 virtual-link 172.16.3.1 network 172.16.2.0 0.0.0.255 area 20 network 172.16.12.0 0.0.0.255 area 0 network 172.16.23.0 0.0.0.255 area 23 end <b></b> |
Router R3
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 |
hostname R3 ! interface Loopback0 ip address 172.16.3.1 255.255.255.0 ! interface Serial0/0/1 ip address 172.16.23.3 255.255.255.0 ip ospf cost 500 ip ospf hello-interval 20 ip ospf dead-interval 80 bandwidth 64 no shutdown ! interface Serial0/1/0 ip address 172.16.34.3 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco clock rate 64000 bandwidth 64 no shutdown ! router ospf 1 area 23 virtual-link 172.16.2.97 area 34 stub no-summary network 172.16.3.0 0.0.0.255 area 23 network 172.16.23.0 0.0.0.255 area 23 network 172.16.34.0 0.0.0.255 area 34 end <b></b> |
Router R4
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
hostname R4 ! interface Loopback0 ip address 172.16.4.1 255.255.255.0 ! interface Serial0/0/0 ip address 172.16.34.4 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco bandwidth 64 no shutdown ! router ospf 1 area 34 stub network 172.16.4.0 0.0.0.255 area 34 network 172.16.34.0 0.0.0.255 area 34 end |
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