Document ID: 12852
Contents
Introduction
Prerequisites
Requirements
Components Used
Conventions
Configure
Network Diagram
Configurations
Debug and Verification Tips
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Related Information
Introduction
The sample configuration described in this document enables a PC connected to a Cisco 677 Asymmetric Digital Subscriber Line (ADSL) Router to connect via a Cisco 6130 Advanced Digital Subscriber Line Access Multiplexer (ADSLAM) to a single or multiple Cisco Universal Access Concentrators (UAC). The specific equipment used in this configuration is not required; for example, the Cisco 677 may be replaced with a Cisco 678.
This sample configuration has a few features enabled on the Cisco 677 that are common to an ADSL rollout. These features are Network Address Translation (NAT), Port Address Translation (PAT), and Dynamic Host Configuration Protocol (DHCP) and allow for a cookie cutter rollout. Since all the boxes have the same configuration, the cost of rollout and documentation is significantly reduced.
The code for the Cisco IOS®-based Node Route Processor (NRP) and Node Switch Processor (NSP) may be copied and pasted to your configurations, but the 677 uses the Cisco Broadband Operating System (CBOS) and this code cannot be copied and pasted. The commands for configuring the Cisco 677 are also included in this sample configuration
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
The information in this document is based on these hardware and software versions:
Hardware:
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PC or workstation
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Cisco 677 ADSL customer premises equipment (CPE)
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ADSL service from your local Telco
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Cisco 6130 ADSLAM with NI-2, DMT-II ATU-C
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Cisco 6400 UAC with 1 x NRP and 1 x NSP
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Software:
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Cisco IOS Release 12.0.7-DC for Cisco 6400 UAC NRP
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Cisco IOS Release 12.0.7-DB for Cisco 6400 UAC NSP
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CBOS Release 2.3.0.012 for Cisco 677 ADSL Router
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Cisco IOS Release 12.0.8-DA1 for Cisco 6130 ADSLAM
Conventions
Refer to Cisco Technical Tips Conventions for more information on document conventions.
Configure
In this section, you are presented with the information to configure the features described in this document.
Note: Use the Command Lookup Tool ( registered customers only) to obtain more information on the commands used in this section.
Network Diagram
This document uses this network setup:
Configurations
A permanent virtual connection (PVC) must be configured on the Cisco 6130, which allows the test subsciber to connect. When you configure the PVP on the NSP and terminate the PPP session on the NRP, the virtual path identifier/virtual channel identifier (VPI/VCI) configuration must be recorded on the Cisco 6400.
This sample configuration shows a virtual path on the NSP. This path allows the Cisco 6400 to pass through the cells from the ADSLAM to the terminating router, or to another ATM switch. Here you can set a PVP to switch the ATM cells to a corporate network or an ISP without terminating the PPP session at the Cisco 6400 located in the central office.
This sample configuration allows remote users transparent access to their corporate networks (if they are connected) for e-mail, file/print sharing and corporate intranet, and to the Internet for Web browsing, etc. without using the corporate Internet connection.
When multiple PVCs are configured on the Cisco 677, it is possible to route traffic via each PVC. Configuration of the ADSLAM and the UAC-NSP will route/switch these PVCs to the correct destination, ISP/ASP or corporate, where PPP can terminate. This configuration reduces traffic, thereby increasing available bandwidth, on the corporate network and uses an existing ISP account to carry Web traffic.
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PC Configuration |
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Set IP addressing to obtain an IP address automatically. Set WINS to use DHCP for WINS resolution. Ensure that no default gateway is set. It may be necessary to set a domain name because DHCP cannot pass this information. |
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Cisco 67x CPE (sh run) |
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[[ IP Routing = Section Start ]] IP NAT = enabled IP Port Address = 00, 172.22.10.254 IP Default Route for Unnumbered Links = 002, 01, 0 IP Static Route Table Entries for Unnumbered Links = 172.22.32.0, 001, 255.255.2 55.0, 1, 0; [[ CBOS = Section Start ]] NSOS Maximum Number of VCs = 2 NSOS Root Password = <root password> NSOS Enable Password = <enable password> [[ PPP Device Driver = Section Start ]] PPP Port User Name = 00, <username for wan0-0> PPP Port User Password = 00, <password for wan0-0> PPP Port User Name = 01, <username for wan0-1> PPP Port User Password = 01, <password for wan0-1> PPP Port Option = 01, IPCP,IP Address,3,Auto,Negotiation Not Required,Negotiable ,IP,0.0.0.0 [[ DHCP = Section Start ]] DHCP Server = enabled DHCP Server Pool IP = 00, 172.22.10.0 DHCP Server Pool Gateway = 00, 172.22.10.254 [[ ATM WAN Device Driver = Section Start ]] ATM WAN Virtual Connection Parms = 00, 1, 32, 0 ATM WAN Virtual Connection Parms = 01, 2, 63, 0 |
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Commands to Issue to the Cisco 67x CPE |
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cbos#set nat enabled NAT is now enabled You must use "write" then reboot for changes to take effect. cbos#set int wan0 maxvcs 2 You must use "write" and reboot for changes to take effect. cbos#write NVRAM written. cbos#reboot Hello! Expanding CBOS image... CBOS v2.3.5.012 - Release Software User Access Verification Password: <root password> cbos>en Password: <enable password> cbos#set ppp wan0-0 login <username for wan0-0> User name for wan0-0 has been set to router. cbos#set ppp wan0-0 password <password for wan0-0> Password for wan0-0 has been set to <password for wan0-0> cbos#set ppp wan0-1 login <username for wan0-1> Password for wan0-1 has been set to <username for wan0-1> cbos#set ppp wan0-1 password <password for wan0-1> Password for wan0-1 has been set to <password for wan0-1> cbos#set ppp wan0-0 ipcp 0.0.0.0 PPP wan0-0 IPCP Address set to 0.0.0.0 cbos#set ppp wan0-1 ipcp 0.0.0.0 PPP wan0-1 IPCP Address set to 0.0.0.0 cbos#set int eth0 address 172.22.10.254 eth0 ip address changed from 10.0.0.1 to 172.22.10.254 cbos#set int eth0 netmask 255.255.255.0 eth0 netmask changed from 255.255.255.0 to 255.255.255.0 You must use "write" then reboot for changes to take effect cbos#set dhcp server enable DHCP Server enabled cbos#set dhcp server pool 0 ip 172.22.10.0 Pool 0 IP parameter is now 172.22.10.0 cbos#set dhcp server pool 0 netmask 255.255.255.0 Pool 0 netmask parameter is now 255.255.255.0 Size of pool 0 is automatically changed to max size 252 cbos#set dhcp server pool 0 gateway 172.22.10.254 Pool 0 gateway parameter is now 172.22.10.254 cbos#set password exec <root password> Exec Password Change Successful! cbos#set password enable <enable password> Enable Password Change Successful! cbos#set route default wan0-1 Default Route set cbos#set route add ip 172.22.32.0 mask 255.255.255.0 gw wan0-0 Route added cbos#set int wan0-0 close Closing connection wan0-0 cbos#set int wan0-1 close Closing connection wan0-1 cbos#set int wan0-0 vpi 1 Change completed. cbos#set int wan0-0 vc1 32 Change completed. cbos#set int wan0-1 vpi 2 Change completed. cbos#set int wan0-1 vci 63 Change completed. cbos#set int wan0-0 open Opening connection wan0-0 cbos#set int wan0-1 open Opening connection wan0-1 cbos#write NVRAM written cbos#reboot |
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61xx ADSLAM |
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interface ATM 1/1 no ip address no ip directed-broadcast no atm ilmi-keepalive pvc 1 32 int atm 0/1 40 40 pvc 2 63 int atm 0/1 50 51 |
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6400 NSP (slot 8) |
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interface ATM 8/0/1 no ip address no ip directed-broadcast no atm ilmi-keepalive atm pvp 40 interface ATM 1/0/0 40 atm pvp 50 interface ATM 2/0/0 50 |
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6400 NRP (slot 1) |
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aaa new-model aaa authentication ppp default local ! ! username <username for wan0-0> password <password for wan0-0> ! ! interface ATM 0/0/0.200 multipoint no ip directed-broadcast pvc 40/40 encapsulation aal5mux ppp Virtual-Template 2 ! ! interface FastEthernet 0/0/0 ip address 172.22.32.1 255.255.255.0 no ip directed-broadcast ! ! interface Virtual-Template 2 ip unnumbered FastEthernet 0/0/0 no ip directed-broadcast peer default ip address pool <pool name A> ppp authentication pap ! ! ip local pool <pool name A> 172.22.40.25 172.22.40.50 |
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6400 NRP (slot 2) |
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aaa new-model aaa authentication ppp default local ! ! username <username for wan0-1> password <password for wan0-1> ! ! interface ATM 0/0/0.300 multipoint no ip directed-broadcast pvc 50/51 encapsulation aal5mux ppp Virtual-Template 21 ! ! interface FastEthernet 0/0/0 ip address 172.16.32.1 255.255.255.0 no ip directed-broadcast ! ! interface Virtual-Template 21 ip unnumbered FastEthernet 0/0/0 no ip directed-broadcast peer default ip address pool <pool name B> ppp authentication pap ! ! ip local pool <pool name B> 172.16.100.10 172.16.100.25 |
Debug and Verification Tips
Use these commands on the Cisco 6400 UAC:
The Output Interpreter Tool ( registered customers only) (OIT) supports certain show commands. Use the OIT to view an analysis of show command output.
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debug ppp negotiation—Shows PPP negotiation debug messages.
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debug ppp authentication—Shows if a client is passing authentication.
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debug ppp error—Displays protocol errors and error statistics associated with PPP connection negotiation and operation.
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show atm pvc—Shows whether the correct PVC was established.
Use these commands on the Cisco 675 CPE:
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show interface wan0—Shows trained up speed for the ADSL link.
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show interface wan0-0—Shows PPP session information on wan0-0.
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show interface wan0-1—Shows PPP session information on wan0-1.
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show dhcp server pool 0—Shows DHCP information at the client site.
Note: Refer to Important Information on Debug Commands before you use debug commands.
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Related Information
- Asymmetric Digital Subscriber Line (ADSL) Support Pages
- Technical Support & Documentation - Cisco Systems
| Updated: Nov 10, 2005 | Document ID: 12852 |