TP : Configuration de routeurs CISCO

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1 TP : Configuration de routeurs CISCO Sovanna Tan Novembre 2010 révision décembre /19 Sovanna Tan TP : Routeurs CISCO

2 Plan 1 Présentation du routeur Cisco Le système d exploitation /19 Sovanna Tan TP : Routeurs CISCO

3 Le routeur Cisco 1841 Image provenant de : 3/19 Sovanna Tan TP : Routeurs CISCO

4 Fonctionnalités du Routeur Cisco 1841 Fonctions de base du routeur Routage : OSPF, RIP, IGRP Network Address Translation (NAT) Access Control Lists (ACLs) Serveur DHCP Serveur HTTP Administration SNMP 4/19 Sovanna Tan TP : Routeurs CISCO

5 Paramétrage du routeur Interfaces de configuration Command Line Interface : port console, telnet Interface graphique : navigateur web et java pour configuration partielle 5/19 Sovanna Tan TP : Routeurs CISCO

6 Sources Mémento Cisco, Configuration générale, R. Bergoin et C. Bourg, Eyrolles /19 Sovanna Tan TP : Routeurs CISCO

7 1 Présentation du routeur Cisco Le système d exploitation /19 Sovanna Tan TP : Routeurs CISCO

8 Le système d exploitation Modes d accès Exécution (prompt >) : mode par défaut Privilégié (prompt #) : commande pour passer en mode privilégié enable Configuration (prompt (config)#) : commande pour passer en mode configuration configure terminal, pour sortir du mode configuration CTRL Z 8/19 Sovanna Tan TP : Routeurs CISCO

9 Obtenir des informations La commande show show running-config show startup-config show interface nominterface show ip interface brief show ip protocols show ip route show ip access-lists show ip nat translations show ip dhcp binding show version la configuration courante la configuration en mémoire la configuration de l interface vue d ensemble des interfaces les protocoles de routage les tables de routage les ACLs le NAT les réservations DHCP version d 9/19 Sovanna Tan TP : Routeurs CISCO

10 Configuration des interfaces En mode configuration interface nominterface ip address adresseip masquesousreseau description no shutdown sélection adresse IP commentaire activation Exemple : Router(config)# interface Fastethernet 0/0 Router(config-if)# ip address Router(config-if)# description "cote reseau local" Router(config-if)# no shutdown 10/19 Sovanna Tan TP : Routeurs CISCO

11 Configuration de la route par défaut En mode configuration ip route adripreseau masque adripgateway route statique Exemple Router(config)# ip route /19 Sovanna Tan TP : Routeurs CISCO

12 Configuration de OSPF En mode configuration router ospf id network adrreseau masqueinverse area noaire default-information originate redistribute rip [subnets] protocole reseau propagation de la route par défaut redistribution des routes RIP Exemple Router(config)# router ospf 1 Router(config-router)# network area 0 Router(config-router)# network area 0 Router(config-router)# default-information originate 12/19 Sovanna Tan TP : Routeurs CISCO

13 Configuration de RIP En mode configuration router rip version numéro network adrreseau default-information originate protocole version réseau propagation de la route par défaut redistribute ospf id redistribution des routes OSPF Exemple Router(config)# router rip Router(config)# version 2 Router(config-router)# network Router(config-router)# network Router(config-router)# default-information originate 13/19 Sovanna Tan TP : Routeurs CISCO

14 Aperçu de la configuration des ACLs standard En mode configuration access-list numéro deny permit adrsrc [masksrc] règle Exemple : autoriser les paquets dont l adresse source est comprise entre et Router(config)# access-list 7 permit Exemple : appliquer l ACL à l interface Router(config)# interface FastEthernet 0/0 Router(config-if)# ip access-group 7 in 14/19 Sovanna Tan TP : Routeurs CISCO

15 Les objectifs du NAT NAT statique Il rend visible un serveur appartenant à un réseau non routable en faisant correspondre son adresse IP à une adresse IP accessible de l extérieur. En mode configuration ip nat inside source static adrinterne adrexterne règle NAT dynamique Il permet à un ensemble de machines appartenant à un réseau non routable de communiquer avec le réseau externe en transformant leurs adresses en une ou plusieurs adresses accessibles de l extérieur. 15/19 Sovanna Tan TP : Routeurs CISCO

16 Configuration du NAT dynamique En mode configuration ip nat pool nom IPdebut IPFin netmask prefix-length masque ip nat inside source list numéroacl pool nompool [overload] plage lien ACL Exemple : Router(config)# access-list 7 permit Router(config)# ip nat pool ovrld prefix 24 Router(config)# ip nat inside source list 7 pool ovrld overload Router(config)# interface FastEthernet0/0 Router(config-if)# ip address Router(config-if)# ip nat inside Router(config)# interface FastEthernet 0/1 Router(config-if)# ip address Router(config-if)# ip nat outside 16/19 Sovanna Tan TP : Routeurs CISCO

17 Configuration des accès console et telnet En mode configuration username nom priv niveau secret O pass line con 0 line vty 0 4 login local utilisateur accès port console accès telnet demander login/password Exemple Router(config)# user admin priv 15 secret 0 cisco Router(config)# line con 0 Router(config-line)# login local Router(config)# line vty 0 4 Router(config-line)# login local 17/19 Sovanna Tan TP : Routeurs CISCO

18 Configuration du DHCP En mode configuration ip dhcp pool nompool network adrip masque ip dhcp excluded-address adrdebut [adrfin] default-router adrip dns-server adrip service dhcp configuration adresse réseau plage non allouée route par défaut serveur DNS démarrer le service Exemple Router(config)# ip dhcp pool ssi Router(dhcp-config)# network Router(dhcp-config)# default-router Router(dhcp-config)# dns-server Router(dhcp-config)# ip dhcp excluded-address Router(config)# service dhcp 18/19 Sovanna Tan TP : Routeurs CISCO

19 Sauvegarde des configurations En mode privilégié copy running-config startup-config ou write memory copy run tftp://adripserveur:/fichier sauvegarde dans la NVRAM sauvegarde sur un serveur tftp Exemple Router# copy running-config startup-config Router# copy running tftp:// :/config-routeur 19/19 Sovanna Tan TP : Routeurs CISCO

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