Procedural Lab Template, Student Version, Required Components

CCNA Exploration

{0>Routing Protocols and Concepts:Conceptos yprotocolos de enrutamiento:Lab 11.6.2:Prctica de laboratorio 11.6.2:Challenge OSPF Configuration LabPrctica de laboratorio sobre desafo a la configuracin OSPFLab 11.6.2:Prctica de laboratorio 11.6.2:Challenge OSPF Configuration Lab (Instructor Version)Prctica de laboratorio sobre desafo ala configuracin bsica de OSPF Topology Diagram Diagrama de topologaAddressing TableTabla de direccionamientoDeviceDispositivoInterfaceInterfazIP AddressDireccin IPSubnet MaskMscara desubredDefault GatewayGateway por defectoHQFa0/0N/ANo aplicableS0/0/0N/ANo aplicableS0/0/1N/ANo aplicableLo1N/ANo aplicableBranch1Fa0/0N/ANo aplicableS0/0/0N/ANo aplicableS0/0/1N/ANo aplicableBranch2Fa0/0N/ANo aplicableS0/0/0N/ANo aplicableS0/0/1N/ANo aplicablePC1PC1NICNICPC2PC2NICNICPC3PC3NICNICLearning ObjectivesObjetivos de aprendizajeUpon completion of this lab, you will be able to:Al completar esta prctica de laboratorio, usted podr:Create an efficient VLSM design given requirements Crear un diseo VLSM eficiente segn los requisitosAssign appropriate addresses to interfaces and document Asignar las direcciones correspondientes a interfaces ydocumentosCable a network according to the Topology DiagramConectar una red de acuerdo con el Diagrama de topologaErase the startup configuration and reload a router to the default stateEliminar la configuracin de inicio yrecargar un router al estado por defectoConfigure routers including OSPFConfigurar routers, OSPF inclusiveConfigure and propagate a static default routeConfigurar ypropagar una ruta esttica por defectoVerify OSPF operation Verificar el funcionamiento de OSPFTest and verify full connectivityProbar yverificar la conectividad totalReflect upon and document the network implementationReflexionar sobre la implementacin de la red ydocumentarloScenarioEscenarioIn this lab activity, you will be given a network address that must be subnetted using VLSM to complete the addressing of the network shown in the Topology Diagram.En esta actividad de laboratorio, se le dar una direccin de red que debe ser dividida en subredes aravs de VLSM para completar el direccionamiento de la red que se muestra en el Diagrama de topologa.A combination OSPF routing and static routing will be required so that hosts on networks that are not directly connected will be able to communicate with each other.Ser necesaria una combinacin de enrutamiento OSPF yenrutamiento esttico para quelososts en redes que no estn directamente conectadas sean capaces de comunicarse entre s.OSPF area ID of 0 and process ID of 1 will be used in all OSPF configurations.La ID de rea OSPF de 0 yla ID de proceso de 1 se utilizarn en todas las configuraciones OSPF.Task 1:Tarea 1:Subnet the Address Space.Divisin en subredes del espacio de direccin.Step 1:Paso 1:Examine the network requirements.Examinar los requisitos de la red.The addressing for the Network has the following requirements.El direccionamiento para la red tiene los siguientes requisitos:The 172.20.0.0/16 network must be subnetted to provide addresses for the LANs and serial links.La red 172.20.0.0/16 debe dividirse en subredes para proporcionar direcciones para las LAN ylos enlaces seriales.The HQ LAN will require 8000 addressesLa LAN HQ requerir 8.000 direcciones.The Branch1 LAN will require 4000 addressesLa LAN Branch1 requerir 4.000 direcciones.The Branch 2 LAN will require 2000 addressesLa LAN Branch2 requerir 2.000 direcciones.The links between the routers will require two addresses for each linkLos enlaces entre los routers requerirn dos direcciones para cada enlace.The loopback address representing the link between the HQ router and the ISP will use the 10.10.10.0/30 network.La direccin de loopback que representa el enlace entre el router HQ yel ISP utilizar la red 10.10.10.0/30.Step 2:Paso 2:Consider the following questions when creating your network design.Considerar las siguientes preguntas al crear el diseo de red.How many subnets need to be created from the 172.20.0.0/16 network?Cuntas subredes se deben crear de la red 172.20.0.0/16?How many total IP addresses are required from the 172.20.0.0/16 network?Cuntas direcciones IP se necesitan de la red 172.16.0.0/16?What subnet mask will be used for the HQ LAN subnet?Qu mscara de subred se utilizar para la subred LAN de HQ?___255.255.224.0 or /19_____________What is the maximum number of host addresses that could be used on this subnet?Cul es la cantidad mxima de direcciones host que se puede usar en esta subred?What subnet mask will be used for the Branch1 LAN subnet?Qu mscara de subred se utilizar para la subred LAN Branch1?___255.255.240.0 or /20_____ ________ What is the maximum number of host addresses that could be used on this subnet?Cul es la cantidad mxima de direcciones host que se puede usar en esta subred?What subnet mask will be used for the Branch2 LAN subnet?Qu mscara de subred se utilizar para la subred LAN Branch2?___255.255.248.0 or /21_____ ________ What is the maximum number of host addresses that could be used on this subnet?Cul es la cantidad mxima de direcciones host que se puede usar en esta subred?What subnet mask will be used for the links between the three routers?Qu mscara de subred se utilizar para los enlaces entre los tres routers?___255.255.255.252 or /30_____ ________ What is the maximum number of host addresses that could be used on each of these subnets?Cul es la cantidad mxima de direcciones host que se puede usar en cada una de estas subredes?Step 3:Paso 3:Assign subnetwork addresses to the Topology Diagram.Asignar direcciones de subred al Diagrama de topologa.Assign subnet 0 of the 172.20.0.0/16 network to the HQ LAN subnet.Asigne la subred 0 de la red 172.20.0.0/16 a la subred LAN HQ.What is the network address of this subnet?Cul es la direccin de red de esta subred?Assign subnet 1 of the 172.20.0.0/16 network to the Branch1 LAN subnet.Asigne la subred 1 de la red 172.20.0.0/16 a la subred LAN Branch1.What is the network address of this subnet?Cul es la direccin de red de esta subred?Assign subnet 2 of the 172.20.0.0/16 network to the Branch2 LAN subnet.Asigne la subred 2 de la red 172.20.0.0/16 a la subred LAN Branch2.What is the network address of this subnet?Cul es la direccin de red de esta subred?Assign subnet 3 of the 172.20.0.0/16 network to the link between the HQ and Branch1 routers.Asigne la subred 3 de la red 172.20.0.0/16 para el enlace entre los routers HQ yBranch1.What is the network address of this subnet?Cules la direccin de red de esta subred?Assign subnet 4 of the 172.20.0.0/16 network to the link between the HQ and Branch2 routers.Asigne la subred 4 de la red 172.20.0.0/16 para el enlace entre los routers HQ yBranch2.What is the network address of this subnet?Cules la direccin de red de esta subred?Assign subnet 5 of the 172.20.0.0/16 network to the link between the Branch1 and Branch2 routers.Asigne la subred 5 de la red 172.20.0.0/16 para el enlace entre los routers Branch1 yBranch2.What is the network address of this subnet?Cul es la direccin de red de esta subred?Task 2:Tarea 2:Determine Interface Addresses.Identificar las direcciones de interfaz.Assign appropriate addresses to the device interfaces.Asigne las direcciones correspondientes para las interfaces del dispositivo.Assign the first valid host address in the 10.10.10.0/30 network to the Loopback 1 interface on the HQ router.Asigne la primera direccin de host vlida en la red 10.10.10.0/30 para la interfaz Loopback 1 enl router HQ.Assign the first valid IP address of the HQ LAN network to the LAN interface of the HQ router.Asigne la primera direccin IP vlida de la red LAN de HQ a la interfaz LAN del router HQ.Assign the last valid IP address of the HQ LAN network to PC2.Asigne la ltima direccin IP vlida de la red LAN de HQ a la PC2.Assign the first valid IP address of the Branch1 LAN network to the LAN interface of the Branch1 router.Asigne la primera direccin IP vlida de la red LAN de Branch1 a la interfaz LAN del routerBranch1.Assign the last valid IP address of the Branch1 LAN network to PC1.Asigne la ltima direccin IP vlida de la red LAN de Branch1 a PC1.Assign the first valid IP address of the Branch2 LAN network to the LAN interface of the Branch2 router.Asigne la primera direccin IP vlida de la red LAN de Branch2 a la interfaz LAN del router Branch2.Assign the last valid IP address of the Branch2 LAN network to PC3.Asigne la ltima direccin IP vlida de la red LAN de Branch2 a PC3.Assign the first valid IP address of the HQ to Branch1 link network to the Serial 0/0/0 interface of the HQ router.Asigne la primera direccin IP vlida del HQ a la red de enlace Branch1 para la interfaz Serial 0/0/0 del router HQ.Assign the last valid IP address of the HQ to Branch1 link network to the Serial0/0/0 interface of the Branch router.Asigne la ltima direccin IP vlida del HQ a la red de enlace Branch1 para la interfaz Serial0/0/0 del router Branch.Assign the first valid IP address of the HQ to Branch2 link network to the Serial 0/0/1 interface of the HQ router.Asigne la primera direccin IP vlida del HQ a la red de enlace Branch2 para la interfaz Serial 0/0/1 del router HQ.Assign the last valid IP address of the HQ to Branch2 link network to the Serial0/0/1 interface of the Branch2 router.Asigne la ltima direccin IP vlida del HQ a la red de enlace Branch2 para la interfaz Serial0/0/1 del router Branch2.Assign the first valid IP address of the Branch1 to Branch2 link network to the Serial 0/0/1 interface of the Branch1 router.Asigne la primera direccin IP vlida del HQ a la red de enlace Branch1 para la interfaz Serial 0/0/1 del router Branch1.Assign the last valid IP address of the Branch1 to Branch2 link network to the Serial0/0/0 interface of the Branch2 router.Asigne la ltima direccin IP vlida del Branch1 a la red de enlace Branch2 para la interfaz Serial0/0/0 del router Branch2.Document the addresses to be used in the table provided under the Topology Diagram.Documente las direcciones a utilizarse en la tabla proporcionada debajo del Diagrama de topologa.Task 3:Tarea 3:Prepare the Network.Preparacin de la red.Step 1:Paso 1:Cable a network that is similar to the one in the Topology Diagram.Conecte una red que sea similar a la del Diagrama de topologa.You can use any current router in your lab as long as it has the required interfaces as shown in the topology.Puede utilizar cualquier router que actualmente tenga en el laboratorio, siempre ycuando cuente con las interfaces necesarias que se muestran en la topologa.Step 2:Paso 2:Clear any existing configurations on the routers.Eliminar todas las configuraciones que tengan los routers.Task 4:Tarea 4:Perform Basic Router Configurations.Realizacin de las configuraciones bsicas del router.Perform basic configuration of the BRANCH, HQ, and ISP routers according to the following guidelines:Realice las configuraciones bsicas de los routers BRANCH, HQ e ISP de acuerdo con las siguientes pautas generales:Configure the router hostname.Configure el nombre de host del router.Disable DNS lookup.Desactive la bsqueda DNS.Configure an EXEC mode password.Configure una contrasea de modo EXEC.Configure a message-of-the-day banner.Configure un mensaje del da.Configure a password for console connections.Configure una contrasea para las conexiones de la consola.Configure a password for VTY connections.Configure una contrasea para las conexiones de VTY.Synchronize unsolicited messages and debug output with solicited output and prompts for the console and virtual terminal lines.Sincronice los mensajes no solicitados yel resultado de la depuracin con el resultado solicitado ylos indicadores para las lneas de consola yde terminal virtual.Configure an EXEC timeout of 15 minutes.Configure un tiempo de espera EXEC de 15 minutos.Task 5:Tarea 5:Configure and Activate Serial and Ethernet Addresses.Configuracin yactivacin de las direcciones serial yEthernet.Step 1:Paso 1:Configure the interfaces on the HQ, Branch1, and Branch2 routers with the IP addresses from the table provided under the Topology Diagram.Configurar las interfaces en los routers HQ, Branch1 yBranch2 con las direcciones IP de la tabla proporcionada en el Diagrama de topologa.When you have finished, be sure to save the running configuration to the NVRAM of the router.Cuando haya finalizado, asegrese de guardar la configuracin en ejecucin para la NVRAM del router.Step 2:Paso 2:Configure the Ethernet interfaces of PC1, PC2, and PC3 with the IP addresses from the table provided under the Topology Diagram.Configurar las interfaces de Ethernet de PC1, PC2 yPC3 con las direcciones IP de la tabla proporcionada en el Diagrama de topologa.Step 3:Paso 3:Configure the correct bandwidth for the serial interfaces on the Branch 1 router.Configurar al ancho de banda correcto para las interfaces seriales en el router Branch 1.What commands are required to accomplish this?Qu comandos se requieren para llevar a cabo esto?________________configure terminal_______________________________________________________________________________________________________________________________________interface serial0/0/0____________________________________________________________________________________________________________________________________bandwidth 128____________________________________________________________________________________________________________________________________________interface serial 0/0/1__________________________________________________________________________________________________________________________________bandwidth 64_____________________________________________________________________________________________________________________________Step 4:Paso 4:Configure the correct bandwidth for the serial interfaces on the Branch 2 router.Configurar al ancho de banda correcto para las interfaces seriales en el router Branch 2.What commands are required to accomplish this?Qu comandos se requieren para llevar a cabo esto?________________configure terminal_______________________________________________________________________________________________________________________________________interface serial0/0/0____________________________________________________________________________________________________________________________________bandwidth 64_____________________________________________________________________________________________________________________________________________interface serial 0/0/1__________________________________________________________________________________________________________________________________bandwidth 256____________________________________________________________________________________________________________________________Step 5:Paso 5:Configure the correct bandwidth for the serial interfaces on the HQ router.Configurar al ancho de banda correcto para las interfaces seriales en el router HQ.What commands are required to accomplish this?Qu comandos se requieren para llevar a cabo esto?________________configure terminal______________________________________________________________________________________________________________________________________interface serial0/0/0___________________________________________________________________________________________________________________________________bandwidth 128___________________________________________________________________________________________________________________________________________interface serial 0/0/1_________________________________________________________________________________________________________________________________bandwidth 256___________________________________________________________________________________________________________________________Task 6:Tarea 6:Verify Connectivity to Next Hop Device.Verificacin de la conectividad del Dispositivo de siguiente salto.You should NOT have connectivity between end devices yet.An NO debe haber conectividad entre los dispositivos finales.However, you can test connectivity between two routers and between and end device and its default gateway.Sin embargo, puede comprobar la conectividad entre dos routers yentre un dispositivo final ysu gateway por defecto.Step 1:Paso 1:Verify that the HQ, Branch1, and Branch2 routers can ping each of the neighboring routers across the WAN links.Verificar que los routers HQ, Branch1 yBranch2 puedan hacer ping en cada uno de los routers vecinos a travs de los enlaces WAN.Step 2:Paso 2:Verify that PC1, PC2, and PC3 can ping their respective default gateway.Verificar que PC1, PC2 yPC3 puedan hacer ping con sus respectivos gateway por defecto.Task 7:Tarea 7:Configure OSPF Routing on the Branch1 Router.Configuracin del enrutamiento OSPF en el router Branch1.Step 1:Paso 1:Consider the networks that need to be included in the OSPF updates that are sent out by the Branch1 router.Tener en cuenta las redes que deben incluirse en las actualizaciones OSPF que se envan mediante el router Branch1.What directly connected networks are present in the Branch1 routing table?Qu redes conectadas directamente estn presentes en la tabla de enrutamiento de Branch1?What commands are required to enable OSPF and include the connected networks in the routing updates?Qu comandos se requieren para habilitar OSPF e incluir las redes conectadas en las actualizaciones de enrutamiento?________________router ospf 1____________________________________________________________________________________________________________________________________________network 172.20.32.0 0.0.15.255 area 0__________________________________________________________________________________________________________________network 172.20.56.0 0.0.0.3 area 0_____________________________________________________________________________________________________________________network 172.20.56.8 0.0.0.3 area 0_____________________________________________________________________________________________________Are there any router interfaces that do not need to have OSPF updates sent out?Existen algunas interfaces de router que no deban enviar las actualizaciones OSPF?____Yes___ ________ What command is used to disable OSPF updates on these interfaces?Qu comando se utiliza para deshabilitar las actualizaciones OSPF de estas interfaces?____passive-interface FastEthernet0/0____________________________________ ________________________________________________________________________ Task 8:Tarea 8:Configure OSPF and Static Routing on the HQ Router.Configuracin de OSPF yenrutamiento esttico en el router HQ.Step 1:Paso 1:Consider the type of static routing that is needed on HQ.Tener en cuenta el tipo de enrutamiento esttico que se necesita en HQ.A static default route will need to be configured to send all packets with destination addresses that are not in the routing table to the loopback address representing the link between the HQ router and the ISP.Ser necesario configurar una ruta esttica por defecto para enviar todos los paquetes con direcciones de destino que no estn en la tabla de enrutamiento hacia la direccin de loopback que representa el enlace entre el router HQ yel ISP.What command is needed to accomplish this?Qu comando se necesita para realizar esto?________________________ip route 0.0.0.0 0.0.0.0 loopback1_____________________________________________________________________________________________What directly connected networks are present in the HQ routing table?Qu redes conectadas directamente se encuentran en la tabla de enrutamiento de HQ?Will the networks of the HQ LAN and the links between the Branch 1 and Branch2 routers need to have the subnet mask information included in the network statements?Las redes de la LAN HQ ylos enlaces entre los routers Branch 1 yBranch2 deben incluir informacin de mscara de subred en las sentencias de red?___yes____________What commands are required to enable OSPF and include the appropriate networks in the routing updates?Qu comandos se requieren para habilitar OSPF e incluir las redes adecuadas en las actualizaciones de enrutamiento?________________router ospf 1____________________________________________________________________________________________________________________________________________network 172.20.0.0 0.0.31.255 area 0__________________________________________________________________________________________________________________network 172.20.56.0 0.0.0.3 area 0_____________________________________________________________________________________________________________________network 172.20.56.4 0.0.0.3 area 0_____________________________________________________________________________________________________Are there any router interfaces that do not need to have OSPF updates sent out?Existen algunas interfaces de router que no deban enviar las actualizaciones OSPF?____Yes___ ______ What command is used to disable OSPF updates on these interfaces?Qu comando se utiliza para deshabilitar las actualizaciones OSPF de estas interfaces?____passive-interface FastEthernet0/0_____________________________________________________________________________________________________________________passive-interface Loopback1________________________________________________________________________________________________________________________The HQ router needs to send the default route information to the Branch1 and Branch2 routers in the OSPF updates.El router HQ debe enviar la informacin de ruta por defecto a los routers Branch1 yBranch2 en las actualizaciones OSPF.What command is used to configure this?Qu comando se utiliza para configurar esto?____ default-information originate_________________________________________________________________________________________________________________Task 9:Tarea 9:Configure OSPF Routing on the Branch2 Router.Configuracin del enrutamiento OSPF en el router Branch2.Step 1:Paso 1:Consider the networks that need to be included in the OSPF updates that are sent out by the Branch2 router.Tener en cuenta las redes que deben incluirse en las actualizaciones OSPF que se envan mediante el router Branch2.What directly connected networks are present in the Branch2 routing table?Qu redes conectadas directamente estn presentes en la tabla de enrutamiento de Branch2?What commands are required to enable OSPF and include the connected networks in the routing updates?Qu comandos se requieren para habilitar OSPF e incluir las redes conectadas en las actualizaciones de enrutamiento?________________router ospf 1____________________________________________________________________________________________________________________________________________network 172.20.48.0 0.0.7.255 area 0__________________________________________________________________________________________________________________network 172.20.56.4 0.0.0.3 area 0_____________________________________________________________________________________________________________________network 172.20.56.8 0.0.0.3 area 0_____________________________________________________________________________________________________Are there any router interfaces that do not need to have OSPF updates sent out?Existen algunas interfaces de router que no deban enviar las actualizaciones OSPF?____Yes___ _________ What command is used to disable OSPF updates on these interfaces?Qu comando se utiliza para deshabilitar las actualizaciones OSPF de estas interfaces?____passive-interface FastEthernet0/0____________________________________ _____________________________________________________________________________ Task 10:Tarea 10:Verify the ConfigurationsVerificacin de las configuracionesAnswer the following questions to verify that the network is operating as expected.Responda las siguientes preguntas para verificar que la red est funcionando correctamente.From PC1, is it possible to ping PC2?Es posible realizar un ping desde PC1 a PC2?_____Yes_______ __________ From PC1, is it possible to ping the PC3?Es posible realizar un ping desde PC1 a PC3?_____Yes_________________ The answer to the above questions should be yes.La respuesta a las preguntas anteriores debe ser s.If any of the above pings failed, check your physical connections and configurations.En caso en que fallen los pings mencionados arriba, verifique las configuraciones yconexiones fsicas.Refer to your basic troubleshooting techniques used in the [Chapter 1] labs.Consulte las tcnicas bsicas de resolucin deproblemas utilizadas en las prcticas de laboratorio del [captulo 1].What OSPF routes are present in the routing table of the Branch1 router?Qu rutas OSPF estn presentes en la tabla de enrutamiento del router Branch1?______________172.20.0.0/19 [110/782] via 172.20.56.1__________________________________________________________________________________________________________________________172.20.48.0/21 [110/1172] via 172.20.56.1__________________________________________________________________________________________________________What is the gateway of last resort in the routing table of the Branch1 router?Cul es el gateway de ltimo recurso en la tabla de enrutamiento del router Branch1?_____________________172.20.56.1 to network 0.0.0.0____________________________________________________________________________________________________________What OSPF routes are present in the routing table of the HQ router?Qu rutas OSPF estn presentes en la tabla de enrutamiento del router HQ?______________172.20.32.0/20 [110/782] via 172.20.56.2_________________________________________________________________________________________________________________________172.20.48.0/21 [110/391] via 172.20.56.6_________________________________________________________________________________________________________________________172.20.56.8/30 [110/1952] via 172.20.56.6__________________________________________________________________________________________________________What is the gateway of last resort in the routing table of the HQ router?Cul es el gateway de ltimo recurso en la tabla de enrutamiento del router HQ?_____________________0.0.0.0 to network 0.0.0.0____________________________________________________________________________________________________________What OSPF routes are present in the routing table of the Branch2 router?Qu rutas OSPF estn presentes en la tabla de enrutamiento del router Branch2?______________172.20.0.0/19 [110/391] via 172.20.56.5_______________________________v___________________________________________________________________________________________172.20.32.0/20 [110/1172] via 172.20.56.5________________________________________________________________________________________________________________________172.20.56.0/30 [110/1171] via 172.20.56.5__________________________________________________________________________________________________________What is the gateway of last resort in the routing table of the Branch2 router?Cul es el gateway de ltimo recurso en la tabla de enrutamiento del router Branch2?_____________________172.20.56.5 to network 0.0.0.0____________________________________________________________________________________________________________Task 11:Tarea 11:ReflectionReflexinOn PC1, use the tracert command to examine the route that is used between PC1 and PC3.En PC1, utilice el comando tracert para examinar la ruta que se utiliza entre PC1 yPC3.What are the hops in the route to PC3?Cules son los saltos en la ruta a PC3?_____172.20.32.1, the FastEthernet0/0 interface of the Branch 1 router.____________________ _____________________________________________________________________________ _____172.20.56.1, the Serial0/0/0 interface of the HQ router._______________________________________________________________________________________________________________172.20.56.6, the Serial0/0/1 interface of the Branch 2 router.__________________________________________________________________________________________________________172.20.55.254, the IP address of PC3._______________________________________________________________________________________________________________________Is this the least number of hops that can be used to reach PC3?Es sta la menor cantidad de saltos que se pueden utilizar para llegar a PC3?_____No____________________If the answer is no, why is a path with more than the minimum amount of hops used?Si la respuesta es no, por qu se utiliza una ruta con ms de la cantidad mnima de saltos?Task 12:Tarea 12:DocumentationDocumentacinOn each router, capture the following command output to a text (.txt) file and save for future reference.En cada router, capture el siguiente resultado de comando en un archivo de texto (.txt) para futuras consultas.show running-configshow running-configshow ip routeshow ip routeshow ip interface briefshow ip interface briefshow ip protocolsshow ip protocolsIf you need to review the procedures for capturing command output, refer to Lab 1.5.1Si necesita revisar los procedimientos para capturar resultados de comandos, consulte la Prctica de laboratorio 1.5.1.Task 13:Tarea 13:Clean UpLimpiezaErase the configurations and reload the routers.Borre las configuraciones yrecargue los routers.Disconnect and store the cabling.Desconecte yguarde los cables.For PC hosts that are normally connected to other networks (such as the school LAN or to the Internet), reconnect the appropriate cabling and restore the TCP/IP settings.Para las PC que funcionan como host, que normalmente estn conectadas a otras redes (como la LAN de la escuela oInternet), reconecte los cables correspondientes yrestablezca las configuraciones TCP/IP.