CCNA 6.5

no sh (no shutdown : start the interface)

 

router rspf 1

network x.x.x.x x.x.x.x area 0

int (interface)

show ip route (to see routing table entries)

 

RIP

Rtr(config)#router rip (enable RIP routing process)

Rtr(config-router)#network (associates a network with a RIP routing)

Rtr#debug ip rip (used to view real time RIP routing updates)

Rtr(config-router)#default-information (used by RIP to propagate default routes)

Rtr#show ip protocols (used to display times used by RIP)

Rtr(config)#no router rip (disables RIP routing process)

 

 

2 devices to protect a network :

• firewall
• IDS/IPS (instruction detection system / instruction prevention system)

 

show running-config (显示密码)

service password-encryption 

end(和上面共同作用加密密码，是的show running-config不能再显示出密码)

show file system (show the file system used b Cisco)

show access-lists

show running-config | include access-list

no access-list 20

access-list 20 permit x.x.x.x

access-list 20 deny x.x.x.x  x.x.x.x

access-list 1 permit x.x.x.x  x.x.x.x (to create an entry in a standard IPv4 ACL)

interface FastEthernet 0/0 (to select an interface to which to apply the ACL)

ip access-group 1 out (to activate the existing ACL on an interface)

 

show run (show runningxxx?)

 

ifconfig (查看网络配置)

 

reload (to reload the operating system)