.::. .:.. .: .:. .:.:.: .. :. ..:. :::

  • Increase font size
  • Default font size
  • Decrease font size
Home Cisco Cisco Guides Cisco PPPOA Configuration Guide

Cisco PPPOA Configuration Guide

E-mail Print PDF

Cisco PPPOA Configuration Guide



service timestamps debug datetime msec
service timestamps log datetime msec
ip subnet-zero

!--- For DHCP:

ip dhcp excluded-address <ip address of ethernet0>
ip dhcp pool <dhcp pool name>
 network <ip network address of ethernet0> <subnet mask>
 default-router <ip address of ethernet0>
 dns-server <ip address of dns server>
interface ethernet0
 no shut
 ip address <ip address> <subnet mask>
 ip nat inside
 no ip directed-broadcast
interface atm0
 no shut
 no ip address
 no ip directed-broadcast
 no ip mroute-cache
 pvc <vpi/vci>
  encapsulation aal5mux ppp dialer 
  dialer pool-member 1 
!--- Common PVC values supported by ISPs are 0/35 or 8/35.
 !--- Confirm your PVC values with your ISP.

interface dialer1
 ip address negotiated 
 no ip directed-broadcast

!--- For NAT:

 ip nat outside
 encapsulation ppp
 dialer pool 1
 ppp chap hostname <username> 
 ppp chap password <password> 
 ppp pap sent-username <username> password <password> 

!--- For NAT:

ip nat inside source list 1 interface dialer1 overload

!--- If you have a pool (a range) of public IP addresses provided 
!--- by your ISP, you can use a NAT Pool. Replace 
!--- ip nat inside source list 1 interface dialer1 overload 


!--- with these two configuration statements:
!--- ip nat inside source list 1 pool <nat pool name> overload
!--- ip nat pool <nat pool name> <first ip address> <last ip address> 
!--- netmask <subnet mask>

!--- If Internet users require access to an internal server, you can 
!--- add this static NAT configuration statement:
!--- ip nat inside source static tcp <inside ip address of server> {80 or 25} 
!---  <outside well-known ip address of server> {80 or 25} extendable
!--- Note: TCP port 80 (HTTP/web) and TCP port 25 (SMTP/mail) are used 
!--- for this example. You can open other TCP or UDP ports, if needed.

ip classless 
ip route dialer1 

!--- For NAT:

access-list 1 permit <ip network address of ethernet0> <wildcard mask>

!--- In this configuration, access-list 1 defines a standard access list 
!--- that permits the addresses that NAT translates. For example, if  
!--- your private IP network is, configure 
!--- access-list 1 permit in order to allow NAT to translate 
!--- packets with source addresses between and

Last Updated on Monday, 05 September 2011 21:33