AsterixTech - All about News, Computer and Technolo

Routers Used : 3640 w/ NM-4T IOS : c3640-jk9s-mz.124-16a Objective In this lab, an OSPF stub area and a totally stubby area will be configured. Scenario The Semarang router needs to be upgraded as it is suspected that the router is not keeping up with the growth of the OSPF internetwork. Diagnostics are performed and it is discovered that the router could benefit from more memory due to the large routing table. The router could also use a faster processor because of frequent Shortest Path First calculations. It is decided instead to create a smaller and more stable routing table using a stub or totally stubby area configuration. Step 1 Build and configure the network according to the diagram. Configure multiarea OSPF according to the diagram. However, do not configure a stub area yet. Use the configuration files from the previous lab if available and make adjustments as necessary. Note : The loopback, Lo5, on Jakarta1 can be ignored for now. Configure each router with th...

Routers Used : 3640 w/ NM-4T IOS : c3640-jk9s-mz.124-16a Objective In this lab, configure OSPF as a point-to-multipoint network type so that it operates efficiently over a hub-and-spoke Frame Relay topology. Scenario International Travel Agency has just connected two regional headquarters to Asterix using Frame Relay in a hub-and-spoke topology. OSPF routing is to be configured over this type of network, which is known for introducing complications into OSPF adjacency relationships. To avoid these complications, manually override the Non-Broadcast Multi-Access (NBMA) OSPF network type and configure OSPF to run as a point-to-multipoint network. In this environment, no DR or BDR is elected. Step 1 Cable the network according to the diagram. Configure the FastEthernet or Loopback interface for each router as shown, but leave the serial interfaces and OSPF routing unconfigured for now. Until Frame Relay is configured, ping is not useful for testing connectivity. Configure por...

Routers Used : 3640 w/ NM-1FE-TX IOS : c3640-jk9s-mz.124-16a Objective In this lab configure a multiarea OSPF operation, interarea summarization, external route summarization, and default routing. Scenario International Travel Agency (ITA) maintains a complex OSPF environment. The task is to optimize OSPF routing, which creates the need to design and configure multiarea OSPF on the key routers connecting Asian regional headquarters to Asterix corporate headquarters and its local sites. Step 1 Build and configure the network according to the diagram, but do not configure a routing protocol yet. Note : Ignore the ISP cloud for now. Also, the Dion-to-Tegal networks 192.168.240.0/24, 192.168.244.0/244, 192.168.248.0/24, and 192.168.252.0/24 will be configured as static routes to Null0 in Steps 5 and 6, so should be deferred until then. Configure each router with the loopback address indicated in the diagram. Be sure to configure Asterix1 with additional loopbacks of Lo0, Lo1, Lo2, and Lo3....

Routers Used : 3640 w/ NM-1FE-TX IOS : c3640-jk9s-mz.124-16a Objective : In this lab, observe the OSPF DR and BDR election processing using debug commands. Then assign each OSPF interface a priority value to force the election of a specific router as a DR. Scenario The backbone of International Travel Agency’s enterprise network consists of three routers connected using an Ethernet core. Asterix1 has more memory and processing power than the other core routers. Unfortunately, other core routers are continually elected as the DR under the default settings. In the interest of optimization, ensure that Asterix1 is elected the DR, because it is best suited to handle associated extra duties, including management of Link State Advertisements (LSA) for Area 0. Investigate and correct this situation. Step 1 Build and configure the network according to the diagram. Use the configuration files from the previous lab if available . Configure OSPF on all Ethernet interfaces. A switch or hub is req...

Routers Used : 3640 w/ NM-1FE-TX IOS : c3640-jk9s-mz.124-16a Objective In this lab, OSPF will be configured on three Cisco routers. First, configure loopback interfaces to provide stable OSPF Router IDs. Then configure the OSPF process and enable OSPF on the appropriate interfaces. After OSPF is enabled, tune the update timers and configure authentication. Scenario The backbone of International Travel Agency’s (ITA) WAN, located in Jakarta, consists of three routers connected using an Ethernet core. Configure these core routers as members of OSPF Area 0. Because the core routers are connected to the Internet, it is decided to implement security, preventing unauthorized routers from joining Area 0. Also, within the core, the network failures need to be realized quickly. Step 1 Build and configure the network according to the diagram, but do not configure OSPF yet. A switch or hub is required to connect the three routers through Ethernet. Use ping to verify the work and test connectivity...

Routers Used : 3640 w/ NM-4T and NM-1FE-TX modules IOS : c3640-jk9s-mz.124-16a Objective In this lab EIGRP will be configured and the operation will be tested over discontiguous subnets by disabling automatic route summarization. Discontiguous subnets are subnets that are out of order. Finally, EIGRP will be manually configured to use specific summary routes. Scenario The International Travel Agency uses VLSM to conserve IP addresses. All LANs are addressed using contiguous subnets, but the company would like to examine the effects of discontiguous subnets using EIGRP for future reference. The existence of multiple networks is simulated by loopback interfaces on the Arief router. The WAN links are addressed using 192.168.64.0 with a 30-bit mask. Because this scheme creates discontiguous subnets, the default summarization behavior of EIGRP should result in incomplete routing tables. The problem should be resolved by disabling the default summarization in EIGRP while maintaining a route ...

Routers Used : 3640 w/ NM-4T and NM-1FE-TX modules IOS : c3640-jk9s-mz.124-16a Objective In this lab EIGRP will be configured over a full mesh topology and then tested to observe DUAL replace a successor with a feasible successor after a link failure. Scenario The International Travel Agency wants to run EIGRP on its core, branch, and regional routers. EIGRP is to be configured and tested for its ability to install alternate routes in the event of link failure. Step 1 Build and configure the network according to the diagram, configuring EIGRP as indicated for AS 100. If using the configuration files from the previous lab, be sure to change IP addresses according to the diagram. Also, remove all loopback interfaces. Set the bandwidth for each serial interface to reflect the diagram. Use the show interface command to verify the configuration. Use ping and show ip route to verify the configuration and test connectivity between all routers. Step 2 Verify that EIGRP maintains all routes ...

Routers Used : 3640 w/ NM-4T modules IOS : c3640-jk9s-mz.124-16a Objective In this lab EIGRP will be configured on three Cisco routers within the International Travel Agency WAN and the basic behaviors of the protocol will be observed. Scenario The International Travel Agency is implementing EIGRP. EIGRP must be configured at all three locations before the Dion1 headquarters can connect to the Dion2 headquarters. Step 1 Build and configure the network according to the diagram, but do not configure EIGRP yet . Use ping to test connectivity between serial interfaces. Dion1 and Dion2 will not be able to ping each other until EIGRP is enabled. Step 2 Configure EIGRP for AS 100 on all routers as the following shows: Dion1(config)#router eigrp 100 Dion1(config-router)#network 192.168.100.0 Dion1(config-router)#network 172.16.0.0 Arief(config)#router eigrp 100 Arief(config-router)#network 172.16.0.0 Dion2(config)#router eigrp 100 Dion2(config-router)#network 192.168.200.0 Dion2(config-router...