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Module 1: Scaling IP Addresses
 
  Command Command Description Command Syntax
1.1.4 ip route 199.99.9.32 255.255.224.0 200.2.2.18 To establish static routes, use the ip route global configuration command. To remove static routes, use the no form of this command. ip route prefix mask {address | interface-type interface-number [ip-address]} [distance] [tag tag] [permanent]
  ip nat pool public_access 199.99.9.40 199.99.9.62 netmask 255.255.255.224 To define a pool of IP addresses for NAT, use the ip nat pool global configuration command. To remove one or more addresses from the pool, use the no form of this command. ip nat pool name start-ip end-ip {netmask netmask | prefix-length prefix-length}[type rotary]
  access-list 1 permit 10.10.10.0 0.0.0.255 To define an access-control list, use the access-list global configuration command. To remove a standard access lists, use the no form of this command. IP standard access-list: access-list access-list-number {deny | permit | remark line} source[source-wildcard] [log]
  ip nat inside source list 1 pool public_access To enable NAT of the inside source address, use the ip nat inside source global configuration command. To remove the static translation or remove the dynamic association to a pool, use the no form of this command. ip nat inside source {list {access-list-number |name} {pool name | interface dialer-name} [overload] | static local-ip global-ip}
  ip nat inside To designate that traffic originating from or destined for the interface is subject to NAT, use the ip nat interface configuration command. To prevent the interface from being able to translate, use the no form of this command. ip nat {inside | outside}
  ip nat outside To designate that traffic originating from or destined for the interface is subject to NAT, use the ip nat interface configuration command. To prevent the interface from being able to translate, use the no form of this command. ip nat {inside | outside}
  show ip nat translations To display active NAT translations, use the show ip nat translations EXEC command. show ip nat translations [verbose]
  ip nat inside source list 1 interface serial 0 overload To enable NAT of the inside source address, use the ip nat inside source global configuration command. To remove the static translation or remove the dynamic association to a pool, use the no form of this command. ip nat inside source {list {access-list-number |name} {pool name | interface dialer-name} [overload] | static local-ip global-ip}
  ip nat inside source static 10.10.10.10 199.99.9.33 To enable NAT of the inside source address, use the ip nat inside source global configuration command. To remove the static translation or remove the dynamic association to a pool, use the no form of this command. ip nat inside source {list {access-list-number |name} {pool name | interface dialer-name} [overload] | static local-ip global-ip}
1.1.5 show ip nat statistics To display NAT statistics, use the show ip nat statistics EXEC command. show ip nat statistics
  show ip nat translations To display active NAT translations, use the show ip nat translations EXEC command. show ip nat translations [verbose]
  clear ip nat translation * To clear dynamic NAT translations from the translation table, use the clear ip nat translation EXEC command. clear ip nat translation {* | [inside global-ip local-ip] [outside local-ip global-ip]}
  clear ip nat translation inside global-ip local-ip [outside local-ip global-ip] To clear dynamic NAT translations from the translation table, use the clear ip nat translation EXEC command. clear ip nat translation {* | [inside global-ip local-ip] [outside local-ip global-ip]}
  clear ip nat translation protocol inside global-ip global-port local-ip local-port [outside local-ip local-port global-ip global-port] To clear extended dynamic NAT translations from the translation table, use the clear ip nat translation EXEC command. clear ip nat translation protocol inside global-ip global-port local-ip local-port [outside local-ip global-ip]
1.1.6 debug ip nat Use this command to verify the operation of the NAT feature by displaying information about every packet that is translated by the router. debug ip nat
  debug ip nat detailed This command generates a description of each packet considered for translation. This command also outputs information about certain errors or exception conditions, such as the failure to allocate a global address. debug ip nat detailed
1.2.5 ip dhcp pool To activate the IOS DHCP server and configure pool-specific settings, use the ip dhcp pool command. To remove the address pool, use the no form of this command. ip dhcp pool pool-name
  ip dhcp excluded-address The DHCP Server assumes that all IP addresses in a DHCP address pool subnet are available for assigning to DHCP clients. You must specify the IP address that the DHCP Server should not assign to clients. dhcp excluded-address low-address [high-address]
  default-router This command specifies the IP address of the default router for a DHCP client. One IP address is required but up to eight IP addresses may be specified. To disable this feature, use the no form of this command. default-router address [address2 ... address8]
  dns-server This command specifies the IP address of a DNS server that is available to a DHCP client. To disable this feature, use the no form of this command. dns-server address [address2 ... address8]
  netbios-name-server This command specifies the IP address of a netbios name server that is available to a DHCP client. One IP address is required. However, up to eight IP addresses can be specified in one command line. To remove the NetBIOS name server list, use the no form of this command. netbios-name-server address [address2 ... address8]
  no service dhcp Enables the CiscoIOS DHCP server and relay features on the router. Use the no form of this command to disable the Cisco IOS DHCP server and relay features. no service dhcp
  service dhcp Enables the CiscoIOS DHCP server and relay features on the router. Use the no form of this command to disable the Cisco IOS DHCP server and relay features. service dhcp
  domain-name This command specifies the domain name for the client. To remove the domain name, use the no form of this command. domain-name domain
1.2.6 show ip dhcp binding This command is used to display DHCP server information from EXEC mode. This displays a list of all bindings created by the DHCP service. show ip dhcp {binding [address] | conflict [address] | database [url] | server statistics}
  show ip dhcp server statistics This command is used to display DHCP server information from EXEC mode. This will display count information regarding the number of DHCP messages that have been sent and received. show ip dhcp {binding [address] | conflict [address] | database [url] | server statistics}
1.2.8 ip helper-address To have the Cisco IOS software forward User Datagram Protocol (UDP) broadcasts, including BOOTP, received on an interface, use the ip helper-address interface configuration command. To disable the forwarding of broadcast packets to specific addresses, use the no form of this command. ip helper-address address
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