Cisco 827 - 827 Router - EN Guide de dépannage

Table of ContentsCisco DSL Router Configuration and Troubleshooting Guide...1Types

Router(config)#interface ethernet 0Router(config−if)#bridge group 1Router(config−if)#no shutRouter(config−if)#endConfigure the ATM interface of your C

Is your ISP providing a dynamicallygenerated IP address?Yes NoWhat is the IP address of the ISP's defaultgateway (also called the next hopad

Connect the RJ−45 connector at the other end of the console cable to an RJ−45 to DB9 converter.2. Connect the DB9 connector to an open COM port on you

Configure the Cisco DSL RouterConfigure service timestamp to properly log and display debug output in the troubleshootingsection.Router#configure term

Router(config)#ip dhcp excluded−address <ip address of ethernet0>Router(config)#ip dhcp pool <dhcp pool name>Router(dhcp−config)#network &

!!ip classless ip route 0.0.0.0 0.0.0.0 <default gateway to isp>ip route <default gateway to isp> 255.255.255.255 atm0.1!end Troubl

Configure each host PC with an IP address, subnet mask, default gateway, and Domain Name System(DNS) server(s).Alternatively, if you want the Cisco DS

!−−− for this example. You can open other TCP or UDP ports, if needed.! ip classless ip route 0.0.0.0 0.0.0.0 <default gateway to isp>access−lis

Alternatively, if you want the Cisco DSL Router to assign your PC clients' dynamic IP addresses,configure each PC to obtain an IP address and DNS

All contents are Copyright © 1992−−2003 Cisco Systems Inc. All rights reserved. Important Notices and Privacy Statement.Cisco DSL Router Configuration

For more information on the pinouts of a rolled cable, or the pinouts of an RJ−45 to DB9 converter, seeCabling Guide for Console and AUX Ports.Connect

!−−− Confirm your PVC values with your ISP. ! bridge−group 1!bridge 1 protocol ieee!endTroubleshoot Your ConfigurationIf your ADSL service is not wor

System configuration has been modified. Save? [yes/no]:noProceed with reload? [confirm]yes!−−− Reloading the router may take a few minutes.After the r

Configure a default route using ATM0.1 as the outbound interface.Router#configure terminalRouter(config)#ip route 0.0.0.0 0.0.0.0 atm0.1Router(config)

ConfigurationShown below is the configuration you built in the previous section, "Step−by−Step Configuration".Cisco DSL Router with a Single

!−−− access−list 1 permit 10.10.10.0 0.0.0.255 would allow NAT to translate !−−− packets with source addresses between 10.10.10.0 and 10.10.10.255.!en

Layer 1 IssuesIs the carrier detect (CD) light on the front panel of the Cisco DSL Routeron or off?If the CD light is on, go to the Layer 2 Issues sec

Pin Description3 XDSL_Tip4 XDSL_RingTo determine if the ATM0 interface is down and down, issue the show interface atm 0 command fromenable mode of the

Is the circuit tested/provisioned correctly?Obtain this information from your ISP or telephone company.Layer 2 IssuesDo you have the correct Permanent

Make sure you have debug ATM events running on the Cisco DSL Router, and then go to a workingInternet connection and begin to ping the IP address your

If the ping test fails (a ping success rate of 0 percent), you see output similar to the output shown below.Router#ping 192.168.1.1Type escape sequenc

The purpose of this document is to help you verify that your DSL router complies with the minimumhardware and software requirements needed to use the

Layer 1 IssuesIs the carrier detect (CD) light on the front panel of the Cisco DSL Routeron or off?If the CD light is on, go to the Layer 2 Issues sec

2691, 3725, 3745Supported in:Chassis WIC slots• NM−1FE1R2W• NM−1FE2W• NM−2FE2W• NM−2W• Software Requirements and Limitations of Cisco ADSL WICTo suppo

RFC1483 Routing Online FormBefore you can successfully configure your Cisco DSL Router with Asymmetric Digital Subscriber Line(ADSL) service, you need

address)?Record Information About Your NetworkRecord the following information about your private network. This information is not related to the ISP.

Connect the Cisco DSL Router and Your PCA console connection is made with a rolled cable and connects the console port of the Cisco DSL Router to aCOM

Router#write eraseReload the router so it will boot with a blank startup configuration.Router#reloadSystem configuration has been modified. Save? [yes

Router(config−if−atm−vc)#no shutRouter(config−if−atm−vc)#endCreate and configure a bridged virtual interface (BVI) to enable a dynamic IP address to b

*Jan 1 00:00:00.100: %SYS−5−CONFIG_I: Configured from console by consoleRouter#write memoryBuilding configuration... [OK]Router#View Your Configuratio

!−−− ip nat inside source list 1 interface bvi1 overload !−−− with the following two configuration statements:!−−− ip nat inside source list 1 pool &l

Network Address Translation (NAT).Design an IP addressing scheme for your private LAN.• Configure an IP address and subnet mask on the Cisco DSL Route

no ip address no ip directed−broadcast no atm ilmi−keepalive pvc <vpi/vci> encapsulation aal5snap!−−− Common PVC values supported by ISPs are

Pin Description3 XDSL_Tip4 XDSL_RingTo determine if the ATM0 interface is down and down, issue the show interface atm 0 command fromenable mode of the

Cisco DSL Router Configuration and TroubleshootingGuideStep−by−Step Configuration of IRB with a Static IP AddressYour Internet Service Provider (ISP)

Bits per second: 9600Data bits: 8Parity: NoneStop bits: 1Flow Control: NoneClick OK.f. From the Call menu, click Disconnect.g. From the Call menu, cli

Router(config)#endConfigure integrated routing and bridging (IRB) global parameters.Router#configure terminalRouter(config)#bridge irbRouter(config)#b

<last ip address> netmask <subnet mask>Router(config)#endStatic NAT, if Internet users require access to internal servers.Router(config)#

interface ethernet0 no shut ip address <ip address> <subnet mask> ip nat inside no ip directed−broadcast!interface atm0 no shut no ip addr

Cisco DSL Router Configuration and TroubleshootingGuideRFC1483 Bridging with IRB Implementation OptionsSelect one of the following RFC1483 Bridging wi

Create and configure the Bridge Group Virtual Interface (BVI) interface of the Cisco DSL Router forIRB with a static IP address.• Configure NAT on the

!ip nat inside source list 1 interface bvi1 overload!−−− If you have a pool (a range) of public IP addresses provided !−−− by your ISP, you can use a

Is the circuit tested/provisioned correctly?Obtain this information from your ISP or telephone company.Layer 2 IssuesDo you have the correct PVC value

Make sure you have debug ATM events running on the Cisco DSL Router, and then go to a workingInternet connection and begin to ping the IP address your

If the ping test fails (a ping success rate of 0 percent), you see output similar to the output shown below. Inthis case, continue with the troublesho

In this case, you will probably see only a single entry in the bridge table. That entry should include the MACaddress of your default gateway. To veri

Cisco DSL Router Configuration and TroubleshootingGuideRFC1483 Bridging with IRB Online FormBefore you can successfully configure your Cisco DSL Route

Is your ISP providing a dynamicallygenerated IP address?Yes NoWhat is the IP address of the ISP's defaultgateway (also called the next hopad

Table of ContentsCisco DSL Router Configuration and Troubleshooting GuideView Your Configuration...

Step−by−Step ConfigurationImportant: Before you begin, close all programs on the PC that might be monitoring your COM port.Devices such as PDAs and di

Clear Existing Configurations on the Cisco DSL RouterType enable at the router prompt to enter privileged mode.Router>enableRouter#!−−− The # symbo

Router(config)#interface atm 0Router(config−if)#pvc <vpi/vci>Router(config−if−atm−vc)#encapsulation aal5mux ppp dialerRouter(config−if−atm−vc)#d

Router(dhcp−config)#default−router <ip address of ethernet0> Router(dhcp−config)#dns−server <ip address of primary dns server> <ip add

no ip directed−broadcast ip nat outside encapsulation ppp dialer pool 1 ppp chap hostname <username> ppp chap password <password> ppp p

Note: A color code is used to relate tasks in this section with examples of configurations in the Configurationsection. Configurations are color−coded

Press Enter until you see a router prompt on your HyperTerminal screen.i. Clear Existing Configurations on the Cisco DSL RouterType enable at the rout

Router#configure terminalRouter(config)#interface atm 0Router(config−if)#pvc <vpi/vci>Router(config−if−atm−vc)#encapsulation aal5mux ppp dialerR

Router(dhcp−config)#network <ip network address of ethernet0> <subnet mask> Router(dhcp−config)#default−router <ip address of ethernet

no ip directed−broadcast ip nat outside encapsulation ppp dialer pool 1 ppp chap hostname <username> ppp chap password <password> ppp p

Table of ContentsCisco DSL Router Configuration and Troubleshooting GuideTroubleshoot Your Configuration...

Tip: If you are not familiar with configuring Cisco devices and would like to follow a step−by−stepconfiguration, click here.Tasks to PerformNote: A c

interface atm0 no shut no ip address no ip directed−broadcast no ip mroute−cache pvc <vpi/vci> encapsulation aal5mux ppp dialer dialer pool−m

Cisco DSL Router Configuration and TroubleshootingGuideCisco DSL Router – PPPoA with a Static IP AddressYour Internet Service Provider (ISP) has assig

!ip dhcp excluded−address <ip address of ethernet0>ip dhcp pool <dhcp pool name> network <ip network address of ethernet0> <subne

Troubleshoot Your ConfigurationIf your ADSL service is not working properly, see Troubleshooting PPPoA.Previous Page Main PageAll contents are Copyrig

PPPoE Cisco DSL Router Client Option 1 Your ISP is assigning a single dynamic public IP address to yourCisco DSL Router.PPPoE Cisco DSL Router Client

Is the carrier detect (CD) light on the front panel of the Cisco DSL Routeron or off?If the CD light is on, go to the Layer 2 Issues section of this d

4 XDSL_RingNote: Please note the Cisco 1417 uses pins 2 and 5 on a standard RJ−11 6−pin modular jack.To determine if the ATM0 interface is down and do

Is the circuit tested/provisioned correctly?Obtain this information from your ISP or telephone company.Layer 2 IssuesDo you have the correct Permanent

2d18h: RX interrupt: conid = 0, rxBd = 0x80C7EED8 length=522d18h: Data Cell received on vpi = 8 vci = 35Make sure you have debug ATM events running on

Table of ContentsCisco DSL Router Configuration and Troubleshooting GuideContact the Cisco Technical Assistance Center...

Is PPP negotiating properly?If Layer 1 is up and you have the correct VPI/VCI, the next step is to make sure PPP is coming up properly.To accomplish t

Router#debug ppp negotiation*Mar 1 04:04:50.718: Vi1 PPP: Treating connection as a callout*Mar 1 04:04:50.718: Vi1 PPP: Phase is ESTABLISHING, Active

*Mar 1 04:52:43.418: Vi1 LCP: I CONFREQ [ACKrcvd] id 182 Len 14*Mar 1 04:52:43.418: Vi1 LCP: AuthProto PAP (0x0304C023)*Mar 1 04:52:43.418: Vi1 LCP: M

To correct both authentication mismatch problems, refer to the appropriate PPPoA implementation optionconfiguration and reconfigure PPP authentication

How do I know if my CHAP username and password are correct?After you have confirmed that your ISP is using CHAP, issue the debug ppp negotiation comma

*Mar 3 03:30:09.379: Vi1 CHAP: Username 6400−2−NRP3 not found*Mar 3 03:30:09.383: Vi1 CHAP: Using default password*Mar 3 03:30:09.383: Vi1 CHAP: O RES

RFC1483 Bridging ImplementationsSelect one of the following RFC1483 bridging implementations for your Asymmetric Digital Subscriber Line(ADSL) service

Record Information from the ISPThe following form includes questions about the name of the reseller where you purchased your Cisco DSLRouter and about

New DSL configurationTroubleshooting my existing DSL connectionMain PageAll contents are Copyright © 1992−−2003 Cisco Systems Inc. All rights reserved

Assign a name to your session, and click OK.a. From the Connect To window, click Cancel.b. From the File menu, click Properties.c. From the Properties

Table of ContentsCisco DSL Router Configuration and Troubleshooting GuideIs the circuit tested/provisioned correctly?...

Disable logging console on your Cisco DSL Router to suppress console messages that may betriggered while you are configuring the router.Router#configu

Router(config−if)#ppp chap password <password>Router(config−if)#ppp pap sent−username <username> password <password>Router(config−if

Router#show runBuilding configuration...ConfigurationShown below is the configuration you built in the previous section, "Step−by−Step Configurat

encapsulation ppp dialer pool 1 ppp chap hostname <username> ppp chap password <password> ppp pap sent−username <username> password

Tip: If you are not familiar with configuring Cisco devices and would like to follow a step−by−stepconfiguration, click here.Tasks to PerformNote: A c

In the MTU field, type 1492.5. Click Apply to save the change, and then click Exit.6. Reboot the PPPoE PC client.7. The registry change is saved when

!−−− Confirm your PVC values with your ISP. !!interface dialer1 ip address negotiated mtu 1492ip nat outside encapsulation ppp dialer pool 1 ppp chap

Cisco DSL Router – PC Acting as a PPPoE ClientIn this implementation, your Cisco Digital Subscriber Line (DSL) Router is unable to provide value−added

!bridge 1 protocol ieee!endTroubleshoot Your ConfigurationIf your ADSL service is not working properly, see Troubleshooting a PPPoE PC Client.Previous

Dialer interface.Optional: NAT Pool, if additional IP addresses have been provided by your ISP.♦ Optional: Static NAT, if Internet users require acces

Table of ContentsCisco DSL Router Configuration and Troubleshooting GuideIs the DSL operating−mode correct?...

ip dhcp excluded−address <ip address of ethernet0>ip dhcp pool <dhcp pool name> network <ip network address of ethernet0> <subnet

!−−− permitting the addresses that NAT will translate. For example, if !−−− your private IP network was 10.10.10.0, configuring !−−− access−list 1 pe

Connect the DB9 connector to an open COM port on your PC.3. Start and Set Up HyperTerminalStart the HyperTerminal program on the PC.1. Set up your Hyp

Configure the Cisco DSL RouterConfigure service timestamp to properly log and display debug output in the troubleshootingsection.Router#configure term

Router#configure terminalRouter(config)#interface dialer 1Router(config−if)#mtu 1492Router(config−if)#ip <ip address> <subnet mask>Router(

Building configuration... [OK]Router#View Your ConfigurationYour Cisco DSL Router should now be operational for Asymmetric Digital Subscriber Line (AD

!!interface dialer1 ip address <ip address> <subnet mask> mtu 1492ip nat outside encapsulation ppp dialer pool 1 ppp chap hostname <us

PPPoE: DSL Router as a PPPoE Client – TroubleshootingDetermine the Layer to TroubleshootThere are many reasons why your Digital Subscriber Line (DSL)

Is the ATM interface in an administratively down state?To determine if the ATM0 interface is administratively down, issue the following command in ena

If you are not sure what pins on your wall jack are active, ask your ISP.Do you have the correct power supply for the Cisco 827?If you have verified t

Cisco DSL Router Configuration andTroubleshooting GuideThis document helps you configure your Cisco Digital Subscriber Line (DSL) Customer Premise Equ

24 maximum active VCs, 256 VCS per VP, 1 current VCCsVC idle disconnect time: 300 secondsLast input 00:00:00, output 00:00:00, output hang neverLast c

In this example you can see that the SID is a non−zero number, and that both the RemMAC and LocMACfields are populated. The other field of interest is

2w3d: Vi1 LCP: O CONFACK [Open] id 102 Len 152w3d: Vi1 LCP: AuthProto CHAP (0x0305C22305)2w3d: Vi1 LCP: MagicNumber 0xD945AD0A (0x0506D945AD0A)2w3d: D

*Mar 1 04:04:58.722: Vi1 LCP: O CONFREQ [REQsent] id 5 Len 10*Mar 1 04:04:58.722: Vi1 LCP: MagicNumber 0x317722F4 (0x0506317722F4)*Mar 1 04:05:00.722:

dialer 1 configuration.If your ISP is sending the I CONFNAK, look for commands under interface dialer 1 that match the linefollowing the CONFNAK and r

How do I know if my PAP username and password are correct?After you have confirmed that your ISP is using PAP, issue the debug ppp negotiation command

*Mar 3 02:51:47.347: Vi1 LCP: MagicNumber 0x43B3F393 (0x050643B3F393)*Mar 3 02:51:47.347: Vi1 LCP: I CONFACK [ACKsent] id 188 Len 10*Mar 3 02:51:47.35

*Mar 3 03:33:19.539: Vi1 PPP: Phase is UP [0 sess, 0 load] !−−− PAP negotiation was a success.<... snipped ...>Router#undebug allWhy can I acces

dialer pool 1 ppp chap hostname <username> ppp chap password <password> ppp pap sent−username <username> password <password>!

If you do not have a service contract with Cisco and need assistance implementing PPPoE, direct your webbrowser to Cisco's Warranty Status Tool.P

Cisco DSL Router Configuration and TroubleshootingGuideStep−by−Step Configuration of a PC Acting as a PPPoEClientYour Internet Service Provider (ISP)

Is your ISP using an Alcatel compliant ora Cisco Systems DSLAM?Alcatel Compliant CiscoOther What VPI/VCI pair values (also called thePVC number)

Cisco DSL Router Configuration and TroubleshootingGuidePPPoE: PC as a PPPoE Client – TroubleshootingWhen the PC clients are running a Point−to−Point o

Is your ISP using a DSLAM that supports the Alcatel chipset?Verify this information with your ISP.Is the DSL port on the back of the Cisco DSL Router

If the ATM interface is down and down—not administratively down—check the pinout of your DSL walljack. The DSL Router uses a standard RJ−11 (4−pin or

Important: This will not work with Cisco IOS Software Release 12.1(1)XB.Router#show version!−−− Used to determine your Cisco IOS version.Cisco Interne

All possible debugging has been turned off.Verify your VPI/VCI values, and then make the necessary changes to your configuration.If you do not see out

Bridge group 1 is executing the ieee compatible Spanning Tree protocol Bridge Identifier has priority 32768, address 0001.96a4.a8bc Configured hell

Contact the Cisco Technical Assistance CenterIf you need additional assistance implementing PPPoE, contact the Cisco Technical Assistance Center (TAC)

Cisco DSL Router – RFC1483 Pure BridgingYour Internet Service Provider (ISP) has assigned you a bridged connection.Tip: If you aren't familiar wi

bridge 1 protocol ieee!end Troubleshoot Your ConfigurationIf your ADSL service is not working properly, see Troubleshooting RFC1483 Pure Bridging.Pr

Parity: NoneStop bits: 1Flow Control: NoneClick OK.f. From the Call menu, click Disconnect.g. From the Call menu, click Call.h. Press Enter until you

Assign a name to your session, and click OK.a. From the Connect To window, click Cancel.b. From the File menu, click Properties.c. From the Properties

Disable the logging console on your Cisco DSL Router to suppress console messages that may betriggered while you are configuring the router. Rout

no ip routing!interface ethernet0 no shut no ip directed−broadcast bridge−group 1!interface atm0 no shut no ip address no ip directed−broadcast no atm

The easiest way to determine which layer you should begin troubleshooting is to issue the command show ipinterface brief. The output of this command d

Is the cable pinout correct?If the ATM0 interface status is down and down, the router is not seeing a carrier on the ADSL line. Thisgenerally indicate

Is the DSL operating−mode correct?If everything up to this point in the Layer 1 troubleshooting procedure is correct, the next step is to make sureyou

Enable debugging on the router.3. Router#debug atm eventsATM events debugging is onRouter#2d18h:2d18h: RX interrupt: conid = 0, rxBd = 0x80C7EF74 leng

address, make sure you have only one static default route in the configuration (for example, IP route 0.0.0.00.0.0.0 192.168.1.1).For the example abov

Router#Is there an entry in the bridge table?When you are sure that your bridged interface is forwarding, you need to determine if you have the Layer

Cisco DSL Router Configuration and TroubleshootingGuideRFC1483 Pure Bridging Online FormBefore you can successfully configure your Cisco Digital Subsc