Multilink PPP assíncrono de roteador para roteador

Introduction

Esta configuração descreve um Cisco 3640 remoto com um placa interna de modem analógico de 8 portas (NM-8AM) que disca para um Cisco AS5300 com uma interface de taxa primária (PRI). A configuração descreve uma conexão multilink composta de duas linhas telefônicas analógicas em um local remoto. Mais linhas telefônicas podem ser configuradas para MP, se estiverem disponíveis.

Prerequisites

Requirements

Não existem requisitos específicos para este documento.

Componentes Utilizados

As informações neste documento são baseadas nas versões de software e hardware abaixo.

• Um Cisco 3640 executando o Cisco IOS Software Release 12.1(3)

• Um Cisco AS5300 executando o Cisco IOS Software Release 12.07(T)

Observação: o MP foi introduzido pela primeira vez no Cisco IOS Software Release 11.0(3).

As informações neste documento foram criadas a partir de dispositivos em um ambiente de laboratório específico. All of the devices used in this document started with a cleared (default) configuration. Se você estiver trabalhando em uma rede ativa, certifique-se de que entende o impacto potencial de qualquer comando antes de utilizá-lo.

Conventions

Para obter mais informações sobre convenções de documento, consulte as Convenções de dicas técnicas Cisco.

Material de Suporte

O PPP multilink (MP) permite que dispositivos enviem dados em diversos enlaces de dados ponto-a-ponto para o mesmo destino implementando um enlace virtual. A conexão MP tem uma largura de banda máxima igual à soma das larguras de banda dos links componentes. O MP pode ser configurado para enlaces multifacetados, como ISDN e Frame Relay, ou para várias linhas assíncronas. Consulte o RFC 1990 para obter mais informações sobre o MP.

Observação: o RFC 1990 se refere ao PPP Multilink como MP. Outros nomes pelos quais o <P é conhecido incluem MPPP, MLP e Multilink.

O MP assíncrono pode ser usado para conectar clientes remotos em uma velocidade maior do que a disponível através de uma única conexão analógica. No Async MP, o cliente remoto usa vários modems e, portanto, várias linhas telefônicas para discar para o roteador central e acessar a rede. Como várias linhas telefônicas são freqüentemente mais baratas que o serviço ISDN de Taxa de Interface Básica (BRI), o recurso MP Assíncrono oferece uma forma efetiva de aumentar as velocidades de conexão para usuários remotos ao mesmo tempo em que controlar os custos gerais. O MP assíncrono também é uma maneira eficaz de obter velocidades de acesso mais elevadas para áreas remotas que não podem ser servidas por ISDN.

O MP assíncrono reúne conexões separadas de modem em um Servidor de acesso. O software PPP em cada ponto fragmenta os pacotes e, em seguida, transmite as partes para o outro lado por meio de várias conexões analógicas. As extremidades de recebimento reúnem essas partes das conexões separadas e, com base nas informações de MP embutidas, remontam as partes em pacotes de dados válidos, fornecendo, assim, um enlace virtual de ponta a ponta com maior largura de banda. O MP assíncrono pode ser configurado entre dois roteadores ou entre um roteador e um PC cliente.

Configurar

Nesta seção, você encontrará informações para configurar os recursos descritos neste documento.

Observação: para encontrar informações adicionais sobre os comandos usados neste documento, use a ferramenta Command Lookup

Diagrama de Rede

Este documento utiliza a instalação de rede mostrada no diagrama abaixo.

Configurações

Este documento utiliza as configurações mostradas abaixo.

• Cisco 3640

• Cisco AS5300

clearlake-lan-01#show runnning-config
Building configuration...

Current configuration:
!
version 12.1
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
!
hostname clearlake-lan-01
!
aaa new-model
aaa authentication login default local
aaa authentication ppp default if-needed local
!
username bobslake-nas-01 password <deleted>

!--- Remote router and password for CHAP authentication. !--- Dialer interface must also be configured to use !--- this username and password.

username admin privilege 15 password <deleted>
!         
no ip domain-lookup
!
chat-script async-mppp ABORT ERROR ABORT BUSY 
"" "ATZ" OK "ATDT \T" TIMEOUT 30 CONNECT \c

!--- Chat script used for dialing out.

!
interface Loopback0
 ip address 172.21.126.254 255.255.255.0
!
interface Ethernet0/0
 ip address 172.21.125.1 255.255.255.0
!
interface Group-Async1

!--- Interface to configure modems used for dialout.

 no ip address
 encapsulation ppp

!--- Use PPP encapsulation for members of this !--- group-async interface.

 dialer in-band

!--- Permit DDR on this interface.

 dialer pool-member 10

!--- All members of this group-async interface belong !--- to dialer pool 10.

 ppp multilink

!--- Enable PPP multilink on physical interface.

 group-range 33 34

!--- Assign async 33 and 34 to this group-async interface. !--- This can be adjusted depending on the number of POTS lines available.

! 
 interface Dialer1

!--- Dialer interface to dialout to bobslake-nas-01.

 ip address negotiated

!--- Obtain an IP address from central site.

 encapsulation ppp
 dialer remote-name bobslake-nas-01

!--- Identify central site router for CHAP authentication. !--- Shared secret password is defined above.

 dialer pool 10

!--- Defines the pool of physical resources that the Dialer !--- interface may use.

 dialer idle-timeout 600

!--- Specifies number of seconds without interesting traffic that !--- the connection is kept up.

 dialer string 5551212

!--- Number to be dialed; this number belongs to the PRI !--- of the central router.

 dialer load-threshold 15 either

!--- Load level for either inbound or outbound traffic !--- at which additional lines will be added to the MP bundle. !--- Load level values range from 1 (unloaded) to 255 (fully loaded).

 dialer-group 8

!--- Uses dialer-list 8 to determine interesting traffic.

 ppp authentication chap callin

!--- Use CHAP authentication for incoming calls only !--- This router will not challenge remote routers for outgoing calls.

 ppp multilink

!--- Activates the interface for MP operation.

 ppp timeout multilink link remove 300

!--- Keeps the multilink connections up for 300 seconds !--- after the load drops below the threshold. !--- This command should be used to control flapping.

!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1

!--- Use Interface Dialer1 for all networks.

no ip http server
!
access-list 188 remark define interesting traffic
access-list 188 deny   udp any any eq ntp
access-list 188 permit ip any any
dialer-list 8 protocol ip list 188

!--- Assign access-list 188 to dialer-list 8. 

!
line con 0
 transport input none
line 33 34

!--- Async lines to be used for dialout. !--- This number should match the group-range in the !--- Group-Async interface.

 script dialer async-mppp

!--- Use chat script called async-mppp for dialout.

 modem InOut
 modem autoconfigure discovery
 transport preferred none
 transport input all
line 35 40
 transport preferred none
 transport input all
line aux 0
line vty 0 4
!
ntp clock-period 17179871
ntp server 172.22.255.1 prefer
end

bobslake-nas-01#show running-config 

Building configuration...

Current configuration:
  
version 12.0
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service tcp-small-servers
!
hostname bobslake-nas-01
!
logging buffered 10000 debugging
aaa new-model
aaa authentication login default local
aaa authentication ppp default if-needed local

!--- Authenticate for PPP if not authenticated during login. !--- Allows users with Terminal Window after Dial to initiate PPP.

!
username clearlake-lan-01 password <deleted>

!--- Remote router and password for Challenge Handshake !--- Authentication Protocol (CHAP) authentication. !--- The password must be identical on both sides.

spe 1/0 1/7
firmware location system:/ucode/mica_port_firmware
!
resource-pool disable
!
ip subnet-zero
!
multilink virtual-template 1

!--- Use virtual-template 1 for multilink connections.

isdn switch-type primary-5ess
isdn voice-call-failure 0
!
controller T1 0
 framing esf
 clock source line primary
 linecode b8zs
 pri-group timeslots 1-24
!
 interface Loopback0
  ip address 172.21.10.10 255.255.255.255
  no ip directed-broadcast
!
interface Loopback1
 ip address 172.21.104.254 255.255.255.0

!--- Summarizes addresses in address pool. !--- Loopback 1 is in the same subnet as the address pool.

 no ip directed-broadcast
!
 interface Virtual-Template1
 description Template for Multilink Users
 ip unnumbered Loopback0 
 no ip directed-broadcast
 peer default ip address pool addr-pool

!--- Use IP pool called addr-pool for incoming calls.

 ppp authentication chap

!--- Authenticate using CHAP.

 ppp multilink

!--- Allow multilink sessions.

!

!--- Configure D channel on PRI.

interface Serial0:23
 description Headquarters 555-1212 active PRI line
 no ip address
 no ip directed-broadcast
 isdn switch-type primary-5ess
 isdn incoming-voice mode
 fair-queue 64 256 0
 no cdp enable
!
interface FastEthernet0
 ip address 172.21.101.23 255.255.255.0
 no ip directed-broadcast
 duplex auto
 speed auto
!
interface Group-Async1
 ip unnumbered Loopback0
 no ip directed-broadcast
 encapsulation ppp
 dialer in-band
 dialer idle-timeout 600 either

!--- Specifies number of seconds without interesting !--- traffic that the connection is kept up. !--- Configure the same idle-timeout on both routers.

 dialer map ip 172.21.125.1 name clearlake-nas-01
 dialer-group 5

!--- Uses dialer-list 5 to determine interesting traffic.

 async mode interactive
 peer default ip address pool addr-pool

!--- Use IP pool called addr-pool for incoming calls.

 ppp authentication chap callin

!--- Issue CHAP challenges for dialin users only. 

ppp multilink
 group-range 1 48

!--- Assign modems 1-48 to the Group-Async 1 configuration template.

! 
 router eigrp 1
 passive-interface Group-Async1

!--- To prevent routing traffic on async lines. 

 network 172.21.0.0
!
ip local pool addr-pool 172.21.104.1 172.21.104.48

!--- Define IP address pool range for dialin clients.
 
ip classless
no ip http server
!
access-list 105 permit ip any any

!--- Define interesting traffic.

dialer-list 5 protocol ip list 105

!--- Assign access list 105 to dialer list 5.

!
line con 0
 transport input none
line 1 48
 autoselect during-login

!--- Permits user login prompts after dialin.

 autoselect ppp

!--- Automatically launches PPP on the line.

 modem InOut

!--- Modems can be used to dialin and dialout.

 transport preferred none
 transport output telnet
line aux 0
line vty 0 4
!
ntp clock-period 17180374
ntp update-calendar
ntp server 172.22.255.1 prefer
end

Ajuste e comandos opcionais

Os comandos a seguir podem ser usados para ajustar o comportamento da conexão de MP. O ajuste cuidadoso de tais parâmetros pode ajudar a controlar custos evitando o desperdício e o uso desnecessário de enlaces de dados.

• dialer load-threshold load[outbound | entrada | quer]

  O MP pode ser configurado de modo que os canais adicionais apareçam imediatamente após o canal principal ser estabelecido. Para configurar esse cenário, defina o valor de limite de carga no comando dialer load-thershold load como 1. Nesse caso, os canais adicionais são criados e continuam ativos (ou seja, não oscilam). Se o limiar de carga estiver definido para qualquer valor, os canais múltiplos poderão sincronizar dependendo da carga no link. Se desejar que canais adicionais sejam adicionados conforme necessário, dependendo do tráfego, defina o limite de carga para o valor apropriado entre 1 e 255. Por exemplo, para que os canais adicionais cheguem a 50%, o limite deve ser definido como 128 (0,50*255). Ao determinar o limiar, deve-se considerar o tempo de configuração para chamadas assíncronas, porque tempos maiores de configuração podem necessitar de limiares mais baixos.

  A carga pode ser calculada com base em recebimentos, envios ou no maior tráfego recebido ou enviado na interface. Se você basear a carga na entrada ou em qualquer, certifique-se de que o site central tenha Group-Async1 de interface passiva configurada para que as atualizações de roteamento do núcleo não sejam enviadas através da linha assíncrona. Impedir o tráfego de passar no enlace fornece mais largura de banda para outros dados na linha.

• ppp timeout multilink link remove seconds

  Esse comando pode ser usado para evitar que conexões multilink fiquem sem sincronização quando a carga variar. Por exemplo, quando o limiar de carga estiver definido como 15 (ou seja, 15/255=6%) e o tráfego exceder o limiar, linhas adicionais serão criadas. Quando o tráfego fica abaixo do limite, as linhas adicionais são descartadas. Em situações em que as taxas de dados são altamente variáveis, para canais múltiplos, é vantajoso ficar ativo por um período específico de tempo, mesmo quando o limite de carga fica abaixo do valor especificado. Atribua a este intervalo de multilink um tempo menor que o especificado para o intervalo de discador ocioso que controla o intervalo de todos os links.

• ppp timeout multilink link link add seconds

  Esse comando pode ser usado para impedir que vários links sejam adicionados ao pacote MP até que o tráfego alto seja recebido para um intervalo especificado. Isso pode impedir que rajadas de tráfego ativem linhas adicionais desnecessariamente.

Verificar

Esta seção fornece informações que você pode usar para confirmar se sua configuração está funcionando adequadamente.

Determinados comandos show são suportados pela Ferramenta Output Interpreter, que permite que você veja uma análise do resultado do comando show.

• show ppp multilink – Para exibir informações sobre conjuntos de multilink ativos. Este comando deve ser utilizado para verificar a conexão multilink.

• show caller – Para exibir as informações sobre usuários individuais e recursos consumidos no NAS. Este comando exibe estatísticas de chamadas ativas para grandes conjuntos de conexões e exibe os tempos absoluto e ocioso para cada usuário. Se sua versão do Cisco IOS Software não suporta este comando, utilize o comando show user.

• show caller user - Para mostrar parâmetros de um determinado usuário, como a linha de TTY usada, interface assíncrona (prateleira/slot/porta), número do canal DSO, número do modem, endereço IP atribuído, parâmetros de pacote PPP e PPP, etc. Se sua versão do Cisco IOS Software não suporta este comando, utilize o comando show user.

Exemplo de saída de show

As seguintes saídas do comando show são obtidas do Cisco 3640 que está discando para o AS5300. Mostra que a conexão multilink está ativa

clearlake-lan-01#show ppp multilink
Virtual-Access1, bundle name is bobslake-nas-01

!--- Virtualized MP bundle. Bundle name is derived from the !--- username used during authentication.

  Dialer interface is Dialer1

!--- This Virtual Access Interface used Interface Dialer1.

  0 lost fragments, 0 reordered, 0 unassigned
  0 discarded, 0 lost received, 1/255 load
  0x4 received sequence, 0x0 sent sequence
  Member links: 2 (max not set, min not set)
    Async34
    Async33

!--- Members of the MP bundle.


clearlake-lan-01#show dialer


As33 - dialer type = IN-BAND ASYNC NO-PARITY
Dialer pool 10, priority 0

!--- Member of dialer pool 10.

Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is multilink member
Dial reason: Multilink bundle overloaded

!--- Interface was not the first link in the MP bundle. 

Interface bound to profile Di1
Current call connected 00:00:54

!--- Current call duration

Connected to <deleted>5551212 (bobslake-nas-01) 

!--- Phone number that was dialed.


As34 - dialer type = IN-BAND ASYNC NO-PARITY
Dialer pool 10, priority 0

!--- Member of dialer pool 10.

Idle timer (600 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is multilink member
Dial reason: ip (s=172.21.125.1, d=172.21.104.254)

!--- Interface was the first link in the bundle, triggered by !--- interesting traffic.

Interface bound to profile Di1
Current call connected 00:00:54

!--- Current Call duration.

Connected to 5551212 <deleted> (bobslake-nas-01)

!--- Phone number that was dialed.


Gr1 - dialer type = IN-BAND ASYNC NO-PARITY
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is idle


Dial String      Successes   Failures    Last DNIS   Last status

Di1 - dialer type = DIALER PROFILE
Load threshold for dialing additional calls is 15

!--- Load threshold.

Idle timer (600 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Number of active calls = 2

Dial String      Successes   Failures    Last DNIS   Last status
            15          0    00:00:56       successful   Default
clearlake-lan-01#show caller
                                                Active    Idle
  Line         User               Service       Time      Time
  con 0        tarpon             TTY           00:09:11  00:00:00  
  tty 33       -                  Async         -         00:00:01  
  TTY 34       -                  Async         -         00:00:06  
  As33         bobslake-nas-01    PPP           00:00:24  00:00:00  

!--- Second connection.

  As34         bobslake-nas-01    PPP           00:01:05  00:00:00  

!--- First connection. 

  Vi1          bobslake-nas-01    PPP   Bundle  00:01:05  00:01:04  

!--- MP bundle !--- bobslake-nas-01 has two async lines, two TTY, and one virtual !--- interface bundle.


clearlake-lan-01#show caller user bobslake-nas-01

  User: bobslake-nas-01, line As33, service PPP

!--- PPP setting for bobslake-nas-01.

        Active time 00:00:34, Idle time 00:00:00
  Timeouts:            Absolute  Idle
      Limits:          -         -         
      Disconnect in:   -         -         
  PPP: LCP Open, multilink Open, CHAP (-> AAA)

!--- Multilink is up.

  Dialer: Connected 00:01:09 to <deleted>, outbound

!--- Dialer interface was used to dialout.

          Type is IN-BAND ASYNC, group Dialer1
          Cause: Multilink bundle overloaded

!--- This interface was not the first member of the MP bundle.

  IP: Local 172.21.104.48/32
  Bundle: Member of bobslake-nas-01, last input 00:00:00
  Counts: 59 packets input, 3529 bytes, 0 no buffer
          0 input errors, 22 CRC, 0 frame, 0 overrun
          31 packets output, 1515 bytes, 0 underruns
          0 output errors, 0 collisions, 4 interface resets

!--- Packets are passing through the connection.


  User: bobslake-nas-01, line As34, service PPP

!--- PPP setting for user bobslake-nas-01.

        Active time 00:01:15, Idle time 00:00:00
  Timeouts:            Absolute  Idle
      Limits:          -         -         
      Disconnect in:   -         -         
  PPP: LCP Open, multilink Open, CHAP (-> AAA)

!--- MP state is open.

  Dialer: Connected 00:01:10 to <deleted>, outbound
          Type is IN-BAND ASYNC, group Dialer1
          Cause: ip (s=172.21.125.1, d=172.21.104.254)

!--- Dialing cause was interesting traffic; this was the !--- first link in the bundle.

  IP: Local 172.21.104.48/32
  Bundle: Member of bobslake-nas-01, last input 00:00:00
  Counts: 172 packets input, 20699 bytes, 0 no buffer
          0 input errors, 81 CRC, 0 frame, 0 overrun
          80 packets output, 14347 bytes, 0 underruns
          0 output errors, 0 collisions, 6 interface resets

!--- Packets are passing through the connection.


  User: bobslake-nas-01, line Vi1, service PPP Bundle

!--- Bundle information for user bobslake-nas-01.

        Active time 00:01:16, Idle time 00:01:15
  Timeouts:            Absolute  Idle
      Limits:          -         00:10:00  
      Disconnect in:   -         00:08:44  

!--- Idle-timeout is 600 seconds(10 minutes).

  PPP: LCP Open, multilink Open, IPCP
  Dialer: Connected 00:01:10 to <deleted>, outbound
          Idle timer 600 secs, idle 75 secs
          Type is IN-BAND SYNC, group Dialer1
  IP: Local 172.21.104.48/32, remote 172.21.104.254

!--- IP address assigned to the bundle and loopback address !--- of the remote router.

  Bundle: First link of bobslake-nas-01, 2 links, last input 00:01:16
  Counts: 23 packets input, 4758 bytes, 0 no buffer
          0 input errors, 0 CRC, 0 frame, 0 overrun
          7 packets output, 3734 bytes, 0 underruns
          0 output errors, 0 collisions, 0 interface resets

Algumas saídas do comando show do AS5300 são mostradas abaixo. Para obter mais saídas, consulte o documento Async Multilink PPP Dialup da documentação Microsoft Windows Clients. A saída show e debug do AS5300 (site central) será semelhante para o PC-Router Async MP e Router-Router Async MP.

bobslake-nas-01#show ppp multilink

Virtual-Access1, bundle name is clearlake-lan-01
  0 lost fragments, 0 reordered, 0 unassigned, sequence 0x1/0x10 rcvd/sent
  0 discarded, 0 lost received, 1/255 load
  Member links: 2 (max not set, min not set)
    Async47
    Async45

bobslake-nas-01#show caller
                                                Active    Idle
  Line         User               Service       Time      Time
  TTY 45       clearlake-lan-01   Async         00:01:12  00:01:03  
  TTY 47       clearlake-lan-01   Async         00:01:51  00:00:06  
  vty 0        admin              VTY           00:11:02  00:00:00  
  As45         clearlake-lan-01   PPP           00:01:02  00:00:00  
  As47         clearlake-lan-01   PPP           00:01:49  00:00:00  
  Vi1          clearlake-lan-01   PPP   Bundle  00:01:43  00:01:10  

Troubleshoot

Esta seção fornece informações que podem ser usadas para o troubleshooting da sua configuração.

Procedimento de Troubleshooting

Ao Troubleshoot uma conexão MP, continue da mesma maneira que a chamada continua:

Uma Saída de depuração de exemplo, marcada com explicações sobre o que procurar, é fornecida abaixo.

Ao testar sua configuração de MP, verifique se você está gerando tráfego suficiente no link para disparar o limite de carga. Você pode ajustar o valor de limite de carga durante o teste, conforme necessário.

1. Use os comandos debug dialer e debug chat para verificar se o discador está discando corretamente.

2. Verifique se a negociação e a autenticação do PPP foram bem-sucedidas. Preste atenção à negociação de LCP, onde a linha de parâmetros MP, Unidade Máxima Reconstruída de Recepção (MRRU) e o Discriminador de Ponto Final (EndpointDisc) são negociados.

3. Verifique se o link está virtualizado corretamente. Uma interface de acesso virtual será criada pelo software Cisco IOS para representar o pacote MP.

4. Verifique se a negociação do Internet Protocol Control Protocol (IPCP) foi bem-sucedida. Observe se os endereços IP corretos foram atribuídos e se as rotas corretas foram instaladas.

Comandos para Troubleshooting

Determinados comandos show são suportados pela Ferramenta Output Interpreter, que permite que você veja uma análise do resultado do comando show.

Observação: antes de emitir comandos debug, consulte Informações importantes sobre comandos debug.

• debug vtemplate - Para exibir informações de clonagem para uma interface de acesso virtual desde o momento em que é clonada de um modelo virtual até o momento em que é removida.

• debug ppp multilink events – Para exibir informações sobre eventos que afetam os conjuntos multilink.

• debug ppp negotiation - Para exibir informações sobre tráfego e trocas de PPP ao negociar o Protocolo de Controle de Enlaces (LCP), autenticação e Protocolo de Controle de Rede (NCP). Uma negociação de PPP bem-sucedida abrirá primeiramente o estado do LCP e, em seguida, autenticará e, finalmente, negociará o NCP. Parâmetros multilink, como Maximum receive reconstructed unit (MRRU), são estabelecidos durante a negociação LCP.

• debug ppp authentication - Para exibir as mensagens do protocolo de autenticação PPP, incluindo trocas de pacote do Protocolo de autenticação de handshake de desafio (CHAP) e trocas do Protocolo de autenticação de senha (PAP).

• debug ppp error – Para exibir erros do protocolo e estatísticas de erros associados à negociação e operação da conexão PPP

• debug modem – Para exibir a atividade da linha de modem em um servidor de acesso.

Exemplo de saída de depuração

As seguintes saídas foram obtidas do Cisco 3640. Eles mostram o Cisco 3640 discando o PRI do AS5300 e estabelecendo uma conexão MP. Para obter um exemplo da saída de depuração do AS5300, consulte o documento Async Multilink PPP Dialup de Microsoft Windows Clients.

clearlake-lan-01#debug dialer
Dial on demand events debugging is on
clearlake-lan-01#debug ppp negotiation
PPP protocol negotiation debugging is on
clearlake-lan-01#debug ppp authentication 
PPP authentication debugging is on
clearlake-lan-01#debug vtemplate 
Virtual Template debugging is on
clearlake-lan-01#debug ppp multilink events
clearlake-lan-01#show debug
Dial on demand:
  Dial on demand events debugging is on
PPP:
  PPP authentication debugging is on
  PPP protocol negotiation debugging is on
  Multilink events debugging is on
VTEMPLATE:
  Virtual Template debugging is on
clearlake-lan-01#ping ip   
Target IP address: 172.21.104.254
Repeat count [5]: 20
Datagram size [100]: 1200
Timeout in seconds [2]: 
Extended commands [n]: 
Sweep range of sizes [n]: 
Type escape sequence to abort.
Sending 20, 1200-byte ICMP Echos to 172.21.104.254, timeout is 2 seconds:

Jul 25 13:20:29.047 UTC: As34 DDR: rotor dialout [priority]
Jul 25 13:20:29.047 UTC: As34 DDR: Dialing cause ip (s=172.21.125.1, 
d=172.21.104.254)

!--- Dialing Reason

Jul 25 13:20:29.047 UTC: As34 DDR: Attempting to dial 
      
      
        5551212 
      

!--- Number being dialed

Jul 25 13:20:29.047 UTC: CHAT34: Attempting async line dialer script
Jul 25 13:20:29.047 UTC: CHAT34: Dialing using Modem script: 
async-mppp & System script: none

!--- Using chat script async-mppp for dialout

Jul 25 13:20:29.051 UTC: CHAT34: process started
Jul 25 13:20:29.051 UTC: CHAT34: Asserting DTR
Jul 25 13:20:29.051 UTC: CHAT34: Chat script async-mppp started

!--- Call is being established; !--- note the time elapsed for call setup

Jul 25 13:20:54.831 UTC: CHAT34: Chat script async-mppp finished, 
status = Success.
Jul 25 13:20:56.831 UTC: 
%LINK-3-UPDOWN: Interface Async34, changed state to up
Jul 25 13:20:56.831 UTC: 
Async34 DDR: Dialer statechange to up
Jul 25 13:20:56.831 UTC: 
%DIALER-6-BIND: Interface As34 bound to profile Di1
Jul 25 13:20:56.831 UTC: 
Async34 DDR: Dialer call has been placed

!--- PPP negotiation begins

Jul 25 13:20:56.831 UTC: As34 PPP: Treating connection as a callout
Jul 25 13:20:56.831 UTC: As34 PPP: Phase is ESTABLISHING, Active Open
Jul 25 13:20:56.831 UTC: As34 PPP: No remote authentication for call-out

!--- CHAP challenge is configured for callin only !--- LCP negotiation begins; Multilink parameters are also negotiated

Jul 25 13:20:56.835 UTC: As34 LCP: O CONFREQ [Closed] id 43 len 43
Jul 25 13:20:56.835 UTC: As34 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:20:56.835 UTC: As34 LCP:    MagicNumber 0x4395638E (0x05064395638E)
Jul 25 13:20:56.835 UTC: As34 LCP:    PFC (0x0702)
Jul 25 13:20:56.835 UTC: As34 LCP:    ACFC (0x0802)
Jul 25 13:20:56.835 UTC: As34 LCP:    MRRU 1524 (0x110405F4)

!--- Negotiate Maximum Receive Reconstructed Unit (MRRU) !--- MRRU is the maximum packet size this end will reconstruct

Jul 25 13:20:56.835 UTC: As34 LCP:    EndpointDisc 1 Local
Jul 25 13:20:56.835 UTC: As34 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:20:56.835 UTC: As34 LCP:     (0x2D3031).
Jul 25 13:20:58.831 UTC: As34 LCP: TIMEout: State REQsent
Jul 25 13:20:58.831 UTC: As34 LCP: O CONFREQ [REQsent] id 44 Len 43
Jul 25 13:20:58.831 UTC: As34 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:20:58.831 UTC: As34 LCP:    MagicNumber 0x4395638E (0x05064395638E)
Jul 25 13:20:58.831 UTC: As34 LCP:    PFC (0x0702)
Jul 25 13:20:58.831 UTC: As34 LCP:    ACFC (0x0802)
Jul 25 13:20:58.831 UTC: As34 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:20:58.831 UTC: As34 LCP:    EndpointDisc 1 Local
Jul 25 13:20:58.831 UTC: As34 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:20:58.831 UTC: As34 LCP:     (0x2D3031).
Jul 25 13:21:00.831 UTC: As34 LCP: TIMEout: State REQsent
Jul 25 13:21:00.831 UTC: As34 LCP: O CONFREQ [REQsent] id 45 Len 43
Jul 25 13:21:00.831 UTC: As34 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:00.831 UTC: As34 LCP:    MagicNumber 0x4395638E (0x05064395638E)
Jul 25 13:21:00.831 UTC: As34 LCP:    PFC (0x0702)
Jul 25 13:21:00.831 UTC: As34 LCP:    ACFC (0x0802)
Jul 25 13:21:00.831 UTC: As34 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:00.831 UTC: As34 LCP:    EndpointDisc 1 Local
Jul 25 13:21:00.831 UTC: As34 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:00.831 UTC: As34 LCP:     (0x2D3031)
Jul 25 13:21:01.135 UTC: As34 LCP: I CONFACK [REQsent] id 45 Len 43
Jul 25 13:21:01.135 UTC: As34 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:01.135 UTC: As34 LCP:    MagicNumber 0x4395638E (0x05064395638E)
Jul 25 13:21:01.135 UTC: As34 LCP:    PFC (0x0702)
Jul 25 13:21:01.135 UTC: As34 LCP:    ACFC (0x0802)
Jul 25 13:21:01.135 UTC: As34 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:01.135 UTC: As34 LCP:    EndpointDisc 1 Local
Jul 25 13:21:01.135 UTC: As34 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:01.135 UTC: As34 LCP:     (0x2D3031)
Jul 25 13:21:01.139 UTC: As34 LCP: I CONFREQ [ACKrcvd] id 6 Len 47
Jul 25 13:21:01.139 UTC: As34 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:01.143 UTC: As34 LCP:    AuthProto CHAP (0x0305C22305)
Jul 25 13:21:01.143 UTC: As34 LCP:    MagicNumber 0xE16DFC8D (0x0506E16DFC8D)
Jul 25 13:21:01.143 UTC: As34 LCP:    PFC (0x0702)
Jul 25 13:21:01.143 UTC: As34 LCP:    ACFC (0x0802)
Jul 25 13:21:01.143 UTC: As34 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:01.143 UTC: As34 LCP:    EndpointDisc 1 Local
Jul 25 13:21:01.143 UTC: As34 LCP:     (0x131201626F62736C616B652D6E61732D)
Jul 25 13:21:01.143 UTC: As34 LCP:     (0x3031)
Jul 25 13:21:01.143 UTC: As34 LCP: O CONFACK [ACKrcvd] id 6 Len 47
Jul 25 13:21:01.143 UTC: As34 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:01.143 UTC: As34 LCP:    AuthProto CHAP (0x0305C22305)
Jul 25 13:21:01.143 UTC: As34 LCP:    MagicNumber 0xE16DFC8D (0x0506E16DFC8D)
Jul 25 13:21:01.143 UTC: As34 LCP:    PFC (0x0702)
Jul 25 13:21:01.143 UTC: As34 LCP:    ACFC (0x0802)
Jul 25 13:21:01.143 UTC: As34 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:01.143 UTC: As34 LCP:    EndpointDisc 1 Local
Jul 25 13:21:01.143 UTC: As34 LCP:     (0x131201626F62736C616B652D6E61732D)
Jul 25 13:21:01.143 UTC: As34 LCP:     (0x3031)

!--- Both sides have CONFACKed the parameters !--- MRRU of 1524 bytes and the Endpoint Discriminator have been negotiated

Jul 25 13:21:01.143 UTC: As34 LCP: State is Open

!--- LCP negotiation complete

Jul 25 13:21:01.147 UTC: As34 PPP: Phase is AUTHENTICATING, by the peer

!--- Received a challenge from the remote router

Jul 25 13:21:01.351 UTC: As34 CHAP: I CHALLENGE id 3 Len 36 
from "bobslake-nas-01"
Jul 25 13:21:01.351 UTC: As34 CHAP: O RESPONSE id 3 Len 
Jul 25 13:21:01.539 UTC: As34 CHAP: I SUCCESS id 3 Len 4

!--- CHAP authentication successful

Jul 25 13:21:01.539 UTC: As34 PPP: Phase is VIRTUALIZED

!--- Virtualize Async 34 !--- Virtual Access interface will represent the MP bundle

Jul 25 13:21:01.543 UTC: Vi1 VTEMPLATE: Reuse Vi1, recycle queue size 0
Jul 25 13:21:01.543 UTC: Vi1 VTEMPLATE: Hardware address 0030.9401.f101
Jul 25 13:21:01.543 UTC: Vi1 PPP: Phase is DOWN, Setup
Jul 25 13:21:01.543 UTC: %DIALER-6-BIND: Interface Vi1 bound to profile Di1
Jul 25 13:21:01.543 UTC: Vi1 VTEMPLATE: Has a new cloneblk dialer, 
now it has dialer
Jul 25 13:21:01.547 UTC: %LINK-3-UPDOWN: Interface Virtual-Access1, 
changed state to up
Jul 25 13:21:01.547 UTC: Virtual-Access1 DDR: Dialer statechange to up

!--- Virtual Access Interface is up !--- Negotiate LCP and PPP parameters for Virtual-Access Interface

Jul 25 13:21:01.547 UTC: Virtual-Access1 DDR: Dialer call has been placed
Jul 25 13:21:01.547 UTC: Vi1 PPP: Treating connection as a callout
Jul 25 13:21:01.547 UTC: Vi1 PPP: Phase is ESTABLISHING, Active Open
Jul 25 13:21:01.547 UTC: Vi1 PPP: No remote authentication for call-out
Jul 25 13:21:01.547 UTC: Vi1 LCP: O CONFREQ [Closed] id 1 Len 33
Jul 25 13:21:01.547 UTC: Vi1 LCP:    MagicNumber 0x439575FC (0x0506439575FC)
Jul 25 13:21:01.547 UTC: Vi1 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:01.551 UTC: Vi1 LCP:    EndpointDisc 1 Local
Jul 25 13:21:01.551 UTC: Vi1 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:01.551 UTC: Vi1 LCP:     (0x2D3031)
Jul 25 13:21:01.551 UTC: Vi1 PPP: Phase is UP
Jul 25 13:21:01.551 UTC: Vi1 IPCP: O CONFREQ [Closed] id 1 Len 10
Jul 25 13:21:01.551 UTC: Vi1 IPCP:    Address 0.0.0.0 (0x030600000000)
Jul 25 13:21:01.551 UTC: 
As34 MLP: bobslake-nas-01, multilink up, first link

!--- First multilink connection is virtualized

Jul 25 13:21:01.651 UTC: Vi1 IPCP: I CONFREQ [REQsent] id 1 Len 10
Jul 25 13:21:01.651 UTC: Vi1 IPCP:    Address 172.21.104.254 (0x0306AC1568FE)
Jul 25 13:21:01.651 UTC: Vi1 IPCP: O CONFACK [REQsent] id 1 Len 10
Jul 25 13:21:01.651 UTC: Vi1 IPCP:    Address 172.21.104.254 (0x0306AC1568FE)
Jul 25 13:21:01.731 UTC: Vi1 IPCP: I CONFNAK [ACKsent] id 1 Len 10
Jul 25 13:21:01.731 UTC: Vi1 IPCP:    Address 172.21.104.48 (0x0306AC156830)
Jul 25 13:21:01.731 UTC: Vi1 IPCP: O CONFREQ [ACKsent] id 2 Len 10
Jul 25 13:21:01.731 UTC: Vi1 IPCP:    Address 172.21.104.48 (0x0306AC156830)
Jul 25 13:21:01.915 UTC: Vi1 IPCP: I CONFACK [ACKsent] id 2 Len 10
Jul 25 13:21:01.915 UTC: Vi1 IPCP:    Address 172.21.104.48 (0x0306AC156830)
Jul 25 13:21:01.915 UTC: Vi1 IPCP: State is Open
Jul 25 13:21:01.915 UTC: Di1 IPCP: Install negotiated IP interface 
address 172.21.104.48

!--- IP address is assigned to virtual-access interface

Jul 25 13:21:01.919 UTC: Vi1 DDR: dialer protocol up
Jul 25 13:21:01.919 UTC: Di1 IPCP: Install route to 172.21.104.254

!--- Route to loopback address of remote router

Jul 25 13:21:02.539 UTC: 
%LINEPROTO-5-UPDOWN: Line protocol on Interface Async34, 
changed state to up
Jul 25 13:21:02.551 UTC: 
%LINEPROTO-5-UPDOWN: Line protocol on Interface 
Virtual-Access1, changed state to up

!--- Full connectivity with first async connection !--- Begin dialout using second async interface

Jul 25 13:21:08.191 UTC: As33 DDR: rotor dialout [priority]
Jul 25 13:21:08.191 UTC: 
As33 DDR: Attempting to dial 
      
      
        5551212 
      

!--- Number to be dialed; this number is the PRI on the remote router

Jul 25 13:21:08.191 UTC: CHAT33: Attempting async line dialer script
Jul 25 13:21:08.191 UTC: CHAT33: Dialing using Modem script: 
async-mppp & System script: none

!--- Use chat script async-mppp for dialout

Jul 25 13:21:08.191 UTC: CHAT33: process started
Jul 25 13:21:08.191 UTC: CHAT33: Asserting DTR
Jul 25 13:21:08.191 UTC: CHAT33: Chat script async-mppp started
Jul 25 13:21:33.859 UTC: CHAT33: Chat script async-mppp finished, 
status = Success

!--- Chat script successful

Jul 25 13:21:35.859 UTC: %LINK-3-UPDOWN: Interface Async33, 
changed state to up
Jul 25 13:21:35.859 UTC: Async33 DDR: Dialer statechange to up
Jul 25 13:21:35.859 UTC: %DIALER-6-BIND: Interface As33 bound to 
profile Di1
Jul 25 13:21:35.859 UTC: Async33 DDR: Dialer call has been placed

!--- PPP negotiation begins

Jul 25 13:21:35.859 UTC: As33 PPP: Treating connection as a callout
Jul 25 13:21:35.859 UTC: As33 PPP: Phase is ESTABLISHING, Active Open
Jul 25 13:21:35.859 UTC: As33 PPP: No remote authentication for call-out

!--- CHAP challenge is configured for callin only !--- LCP negotiation begins; Multilink parameters are also negotiated

Jul 25 13:21:35.863 UTC: As33 LCP: O CONFREQ [Closed] id 21 Len 43
Jul 25 13:21:35.863 UTC: As33 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:35.863 UTC: As33 LCP:    MagicNumber 0x4395FC05(0x05064395FC05)
Jul 25 13:21:35.863 UTC: As33 LCP:    PFC (0x0702)
Jul 25 13:21:35.863 UTC: As33 LCP:    ACFC (0x0802)
Jul 25 13:21:35.863 UTC: As33 LCP:    MRRU 1524 (0x110405F4)

!--- negotiate Maximum Receive Reconstructed Unit (MRRU)

Jul 25 13:21:35.863 UTC: As33 LCP:    EndpointDisc 1 Local
Jul 25 13:21:35.863 UTC: As33 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:35.863 UTC: As33 LCP:     (0x2D3031)
Jul 25 13:21:37.859 UTC: As33 LCP: TIMEout: State REQsent
Jul 25 13:21:37.859 UTC: As33 LCP: O CONFREQ [REQsent] id 22 Len 43
Jul 25 13:21:37.859 UTC: As33 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:37.859 UTC: As33 LCP:    MagicNumber 0x4395FC05 (0x05064395FC05)
Jul 25 13:21:37.859 UTC: As33 LCP:    PFC (0x0702)
Jul 25 13:21:37.859 UTC: As33 LCP:    ACFC (0x0802)
Jul 25 13:21:37.859 UTC: As33 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:37.859 UTC: As33 LCP:    EndpointDisc 1 Local
Jul 25 13:21:37.859 UTC: As33 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:37.859 UTC: As33 LCP:     (0x2D3031)
Jul 25 13:21:39.859 UTC: As33 LCP: TIMEout: State REQsent
Jul 25 13:21:39.859 UTC: As33 LCP: O CONFREQ [REQsent] id 23 Len 43
Jul 25 13:21:39.859 UTC: As33 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:39.859 UTC: As33 LCP:    MagicNumber 0x4395FC05 (0x05064395FC05)
Jul 25 13:21:39.859 UTC: As33 LCP:    PFC (0x0702)
Jul 25 13:21:39.859 UTC: As33 LCP:    ACFC (0x0802)
Jul 25 13:21:39.859 UTC: As33 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:39.859 UTC: As33 LCP:    EndpointDisc 1 Local
Jul 25 13:21:39.859 UTC: As33 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:39.859 UTC: As33 LCP:     (0x2D3031)
Jul 25 13:21:40.199 UTC: As33 LCP: I CONFREQ [REQsent] id 6 Len 47
Jul 25 13:21:40.199 UTC: As33 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:40.203 UTC: As33 LCP:    AuthProto CHAP (0x0305C22305)
Jul 25 13:21:40.203 UTC: As33 LCP:    MagicNumber 0xE16E950F (0x0506E16E950F)
Jul 25 13:21:40.203 UTC: As33 LCP:    PFC (0x0702)
Jul 25 13:21:40.203 UTC: As33 LCP:    ACFC (0x0802)
Jul 25 13:21:40.203 UTC: As33 LCP:    MRRU 1524 (0x110405F4)
Jul 25 13:21:40.203 UTC: As33 LCP:    EndpointDisc 1 Local
Jul 25 13:21:40.203 UTC: As33 LCP:     (0x131201626F62736C616B652D6E61732D)
Jul 25 13:21:40.203 UTC: As33 LCP:     (0x3031)
Jul 25 13:21:40.203 UTC: As33 LCP: O CONFACK [REQsent] id 6 Len 47

!--- PPP parameters are agreed on (CONFACKed) by both sides

Jul 25 13:21:40.203 UTC: As33 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:40.203 UTC: As33 LCP:    AuthProto CHAP (0x0305C22305)
Jul 25 13:21:40.203 UTC: As33 LCP:    MagicNumber 0xE16E950F (0x0506E16E950F)
Jul 25 13:21:40.203 UTC: As33 LCP:    PFC (0x0702)
Jul 25 13:21:40.203 UTC: As33 LCP:    ACFC (0x0802)
Jul 25 13:21:40.203 UTC: As33 LCP:    MRRU 1524 (0x110405F4)

!--- MRRU of 1524 bytes is accepted

Jul 25 13:21:40.203 UTC: As33 LCP:    EndpointDisc 1 Local
Jul 25 13:21:40.203 UTC: As33 LCP:     (0x131201626F62736C616B652D6E61732D)
Jul 25 13:21:40.203 UTC: As33 LCP:     (0x3031)
Jul 25 13:21:40.207 UTC: As33 LCP: I CONFACK [ACKsent] id 23 Len 43
!--- PPP parameters are agreed on (CONFACKed) by both sides
Jul 25 13:21:40.207 UTC: As33 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Jul 25 13:21:40.207 UTC: As33 LCP:    MagicNumber 0x4395FC05 (0x05064395FC05)
Jul 25 13:21:40.207 UTC: As33 LCP:    PFC (0x0702)
Jul 25 13:21:40.207 UTC: As33 LCP:    ACFC (0x0802)
Jul 25 13:21:40.207 UTC: As33 LCP:    MRRU 1524 (0x110405F4)

!--- MRRU of 1524 bytes is accepted

Jul 25 13:21:40.207 UTC: As33 LCP:    EndpointDisc 1 Local
Jul 25 13:21:40.207 UTC: As33 LCP:     (0x131301636C6561726C616B652D6C616E)
Jul 25 13:21:40.207 UTC: As33 LCP:     (0x2D3031)

!--- LCP negotiation is complete

Jul 25 13:21:40.207 UTC: As33 LCP: State is Open
Jul 25 13:21:40.207 UTC: As33 PPP: Phase is AUTHENTICATING, by the peer

!--- CHAP authentication begins

Jul 25 13:21:40.419 UTC: As33 CHAP: I CHALLENGE id 3 Len 36 
from "bobslake-nas-01"

!--- Received challenge from bobslake-nas-01

Jul 25 13:21:40.423 UTC: As33 CHAP: O RESPONSE id 3 Len 37 
from "clearlake-lan-01"
Jul 25 13:21:42.528 UTC: As33 CHAP: I SUCCESS id 3 Len 4

!--- CHAP authentication is successful

Jul 25 13:21:42.528 UTC: As33 PPP: Phase is VIRTUALIZED

!--- Async 33 is added to Virtualized MP bundle

Jul 25 13:21:42.528 UTC: As33 MLP: bobslake-nas-01, multilink up

!--- Multilink connection is up

Jul 25 13:21:43.528 UTC: %LINEPROTO-5-UPDOWN: 
Line protocol on Interface Async33, 
changed state to up
clearlake-lan-01#
Jul 25 13:23:52.028 UTC: Vi1 MLP: Disabling particle-fastswitching 
in 'bobslake-nas-01'
Jul 25 13:23:52.028 UTC: Vi1 MLP: Enabling particle-fastswitching 
on 'bobslake-nas-01'

!--- Cisco IOS adjusting fast switching strategy to keep in step !--- with delivery of packet fragments

Jul 25 13:23:53.872 UTC: Vi1 MLP: Disabling particle-fastswitching 
in 'bobslake-nas-01'
Jul 25 13:23:53.884 UTC: Vi1 MLP: Enabling particle-fastswitching 
on 'bobslake-nas-01'

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