Configuring SGBP with BAP [Point-to-Point Protocol (PPP)]

Document ID: 10323

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Background Information
Configure
      Network Diagram
      Configurations
Verify
Troubleshoot
      Troubleshooting Commands
      Debug Outputs
NetPro Discussion Forums - Featured Conversations
Related Information

Introduction

This document provides a sample configuration for using Bandwidth Allocation Protocol (BAP) in a Stack Group Bidding Protocol (SGBP) scenario.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

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.

Conventions

For more information on document conventions, refer to Cisco Technical Tips Conventions.

Background Information

In this configuration example, the SGBP stack group is composed of three routers. The router acting as the offload server should include the ppp bap number format digits 4 command in order for BAP to be accepted. In this case, the remote client (the Cisco 800 router) dials-in using one B channel. As soon as the load threshold is reached, a second call is made. However, due to the BAP mechanism, the offload server needs to send the dial string. The second dial string can be a second member in the SGBP group.

Many installations may fail if the virtual template in the offload server is not configured correctly. Here is an example depicting a correct configuration:

interface Virtual-Template1 
 ip unnumbered Loopback0  
 load-interval 30 
 peer default ip address pool default  
 ppp authentication chap pap callin 
 ppp multilink bap  
 ppp timeout multilink link add 1 
 ppp timeout bacp 1  
 ppp bap call accept acknowledge 
 ppp bap timeout pending 20  
 ppp bap max req-retries 1 
 no ppp bap monitor load  
 ppp bap number default 8218 
 ppp bap number format digits 4

The remote client (the Cisco 800) should include this configuration to request BAP:

interface Dialer1 
 ip unnumbered Loopback0 
 encapsulation  ppp 
 dialer in-band 
 dialer load-threshold 1 outbound  
 dialer-group 1 
 peer default ip address pool default  
 ppp callback accept 
 ppp authentication chap pap callin  
 ppp multilink bap 
 ppp bap call accept acknowledge  
 ppp bap timeout pending 20 
 !! ppp bap number default 8218  
 !! ppp bap number format digits 4

The lines with !! are optional. However, it is recommended that you include them with some earlier Cisco IOS® versions, such as version 11.3. A few key points to remember for this configuration:

The dialer-load threshold 2 command must be configured in the requesting BAP router.
The no ppp bap monitor command must be configured in the accepting or passive BAP router.
The ppp bap call accept acknowledge command must be configured in the accepting BAP router.
The ppp multilink bap command must be configured for the dialers of the network access servers (NASs) for SGBP.

Configure

In this section, you are presented with the information to configure the features described in this document.

Note: To find additional information on the commands used in this document, use the Command Lookup Tool ( registered customers only) .

Network Diagram

This document uses this network setup:

Configurations

This document uses these configurations:

Cisco 800 (Remote)
NAS1 and NAS2
Offload Server

Note: We have truncated the following configurations to highlight the relevant information.

Cisco 800 (Remote)

 Current configuration: 
 ! 
 version 12.1 
 service timestamps debug uptime                                         
 service timestamps log uptime 
 no service password-encryption 
 ! 
 hostname tutu 
 ! 
 ! 
 ! 
 ip subnet-zero 
 ! 
 no ip domain-lookup 
 isdn switch-type basic-net3 
 ! 
 ! 
 ! 
 interface Loopback0 
  ip address 8.8.8.8 255.255.255.0 
 ! 
 interface Loopback1 
  ip address 7.7.7.7 255.255.255.0 
 ! 
 interface Loopback3 
  ip address 6.6.6.6 255.255.255.0 
 ! 
 interface Ethernet0 
  no ip address 
  shutdown 
 ! 
 interface BRI0 
  ip address negotiated 
  encapsulation ppp 
  dialer idle-timeout 30000 
  dialer string 8215 
  dialer string 8218111 
  dialer string 8218 class 32 
  dialer load-threshold 2 either 
  dialer-group 1 
  isdn switch-type basic-net3 
  no cdp enable 
  ppp authentication chap pap callin 
  ppp chap hostname remote 
  ppp chap password 7 0822455D0A16 
  ppp multilink bap 
  ppp bap call request 
  ppp bap timeout pending 20 
 ! 
 router rip 
  version 2 
  no validate-update-source 
  redistribute connected 
  network 8.0.0.0 
  network 12.0.0.0 
  default-metric 2 
  no auto-summary 
 ! 
 no ip http server 
 ip route 0.0.0.0 0.0.0.0 BRI0 
 ! 
 ! 
 map-class dialer 64 
  dialer isdn speed 56 
 ! 
 map-class dialer 32 
 access-list 1 permit any 
 dialer-list 1 protocol ip permit 
 ! 
 line con 0 
  exec-timeout 0 0 
  transport input none 
  stopbits 1 
 line vty 0 4 
  password ww 
  login 
 ! 
 end

NAS1 and NAS2

 Current configuration: 
 ! 
 version 12.1 
 service timestamps debug uptime                                         
 service timestamps log uptime 
 no service password-encryption 
 ! 
 hostname caramel 
 ! 
 boot system flash c5300-is-mz.121-3 
 ! 
 username STACK password 0 stack 
 username remote password 0 cisco 
 spe 2/0 2/9 
  firmware location system:/ucode/mica_port_firmware 
 ! 
 ! 
 resource-pool disable 
 ! 
 ! 
 ! 
 ! 
 !          
 ip subnet-zero 
 no ip domain-lookup 
 ip host rund 172.17.247.195 
 ! 
 ! 
 sgbp group STACK 
 sgbp member tnt-buster 30.1.1.2 
 sgbp member tango 30.1.1.3 
 sgbp ppp-forward 
 isdn switch-type primary-net5 
 isdn voice-call-failure 0 
 mta receive maximum-recipients 0 
 ! 
 ! 
 controller E1 0 
  clock source line primary 
  pri-group timeslots 1-31 
 ! 
 controller E1 1 
  clock source line secondary 1 
 ! 
 controller E1 2 
  clock source line secondary 2 
 ! 
 controller E1 3 
  clock source line secondary 3 
 ! 
 ! 
 ! 
 ! 
 interface Loopback0 
  ip address 10.10.10.10 255.255.255.0 
 ! 
 interface Ethernet0 
  description ip addre 30.1.1.1 255.255.255.0 
  ip address 30.1.1.1 255.255.255.0 
 ! 
 interface Serial0 
  no ip address 
  no ip mroute-cache 
  shutdown 
  no fair-queue 
  clockrate 2015232 
 ! 
 interface Serial1 
  no ip address 
  shutdown 
  no fair-queue 
  clockrate 2015232 
 ! 
 interface Serial2 
  no ip address 
  shutdown 
  no fair-queue 
  clockrate 2015232 
 ! 
 interface Serial3 
  no ip address 
  shutdown 
  no fair-queue 
  clockrate 2015232 
 ! 
 interface Serial0:15 
  ip unnumbered Loopback0 
  encapsulation ppp 
  dialer rotary-group 1 
  dialer-group 1 
  isdn switch-type primary-net5 
 !          
 interface FastEthernet0 
  no ip address 
  shutdown 
  duplex auto 
  speed auto 
 ! 
 interface Dialer1 
  ip unnumbered Loopback0 
  encapsulation ppp 
  dialer in-band 
  dialer load-threshold 1 outbound 
  dialer-group 1 
  peer default ip address pool default 
  ppp callback accept 
  ppp authentication chap pap callin 
  ppp multilink bap 
  ppp bap call accept acknowledge 
  ppp bap timeout pending 20 
  !! ppp bap number default 8218 
  !! ppp bap number format digits 4 
 ! 
 router ospf 1 
  log-adjacency-changes 
  redistribute connected subnets 
  redistribute rip subnets 
  network 30.1.1.0 0.0.0.255 area 0 
 ! 
 ip local pool default 10.10.10.11 10.10.10.20 
 ip classless 
 ip route 0.0.0.0 0.0.0.0 10.200.20.1 
 no ip http server 
 ! 
 dialer-list 1 protocol ip permit 
 ! 
 ! 
 line con 0 
  exec-timeout 0 0 
  transport input none 
 line 1 120 
  transport output lat pad telnet rlogin udptn v120 lapb-ta 
 line aux 0 
 line vty 0 4 
  login 
 ! 
 end

Offload Server

 Current configuration: 
 ! 
 version 12.1 
 service timestamps debug uptime 
 service timestamps log uptime 
 no service password-encryption 
 ! 
 hostname tango 
 ! 
 ! 
 username STACK password 0 stack 
 username remote password 0 cisco 
 ! 
 ! 
 ! 
 ! 
 ip subnet-zero 
 no ip domain-lookup 
 ! 
 ! 
 sgbp group STACK 
 sgbp seed-bid offload 
 sgbp member caramel 30.1.1.1 
 sgbp member tnt-buster 30.1.1.2 
 multilink virtual-template 1 
 chat-script reset "" "AT&FS0=1" OK 
 chat-script dialnum ABORT ERROR ABORT BUSY "" "ATDT\T" TIMEOUT 60 CONNECT
 \c 
 ! 
 ! 
 ! 
 interface Loopback0 
  ip address 12.12.12.12 255.255.255.0 
 ! 
 interface Ethernet0 
  ip address 30.1.1.3 255.255.255.0 
 ! 
 interface Virtual-Template1 
  ip unnumbered Loopback0 
  load-interval 30 
  peer default ip address pool default 
  ppp authentication chap pap callin 
  ppp multilink bap 
  ppp timeout multilink link add 1 
  ppp timeout bacp 1 
  ppp bap call accept acknowledge 
  ppp bap timeout pending 20 
  ppp bap max req-retries 1 
  no ppp bap monitor load 
  ppp bap number default 8218 
  ppp bap number format digits 4 
 ! 
 interface Serial0 
  no ip address 
  shutdown 
 ! 
 interface Serial1 
  no ip address 
  shutdown 
 ! 
 interface Serial2 
  no ip address 
  shutdown 
 ! 
 interface Serial3 
  no ip address 
  shutdown 
 ip local pool default 12.12.12.13 12.12.12.20 
 ip classless 
 ip route 49.1.1.2 255.255.255.255 Async4 
 no ip http server 
 ! 
 ! 
 line con 0 
  exec-timeout 0 0 
  transport input none 
 line aux 0 
  script dialer dialnum 
  script reset reset 
  modem InOut 
  transport input all 
 line vty 0 4 
  login 
 ! 
 end

Verify

There is currently no verification procedure available for this configuration.

Troubleshoot

This section provides information you can use to troubleshoot your configuration.

Troubleshooting Commands

Certain show commands are supported by the Output Interpreter Tool ( registered customers only) , which allows you to view an analysis of show command output.

Note: Before issuing debug commands, refer to Important Information on Debug Commands.

show debugging—displays information about the types of debugging that are enabled for your router.
ping—enables you to diagnose basic network connectivity.
show users—displays information about the active lines on the router, or information about lawful-intercept users in privileged EXEC mode.

LAC#show debug 
Dial on demand: 
  Dial on demand events debugging is on 
VPN: 
  L2X protocol events debugging is on 
  VPDN events debugging is on 
PPP: 
  PPP authentication debugging is on 
  PPP protocol negotiation debugging is on 
ISDN: 
  ISDN events debugging is on 

  ISDN events debug DSLs. (On/Off/No DSL:1/0/-) 
  DSL  0 --> 1 
  1 -

LNS#show debug 
Dial on demand: 
  Dial on demand events debugging is on 
VPN: 
  L2X protocol events debugging is on 
  VPDN events debugging is on 
PPP: 
  PPP authentication debugging is on 
  PPP protocol negotiation debugging is on 
VTEMPLATE: 
  Virtual Template debugging is on

Debug Outputs

This section provides the output of various debug commands on the remote router, NAS, and the offload server.

Debug Output on the Remote Router (Cisco 800)

tutu#ping 10.10.10.10 
  
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 10.10.10.10, timeout is 2 seconds: 
  
1d07h: BR0 DDR: Dialing cause ip (s=8.8.8.8, d=10.10.10.10) 
1d07h: BR0 DDR: Attempting to dial 8215 
1d07h: ISDN BR0: TX >  SETUP pd = 8  callref = 0x62 
1d07h:         Bearer Capability i = 0x8890 
1d07h:         Channel ID i = 0x83 
1d07h:         Called Party Number i = 0x80, '8215', 
Plan:Unknown, Type:Unknown 
1d07h: ISDN BR0: RX <  CALL_PROC pd = 8  callref = 0xE2 
1d07h:         Channel ID i = 0x89 
1d07h: ISDN BR0: RX <  PROGRESS pd = 8  callref = 0xE2 
1d07h:         Progress Ind i = 0x8188 - In-band info 
or appropriate now available 
1d07h: ISDN BR0: RX <  CONNECT pd = 8  callref = 0xE2 
1d07h: ISDN BR0: TX >  CONNECT_ACK pd = 8  callref = 0x62 
1d07h: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 
1d07h: BR0:1 PPP: Treating connection as a callout 
1d07h: BR0:1 PPP: Phase is ESTABLISHING, Active Open 
1d07h: BR0:1 PPP: No remote authentication for call-out 
1d07h: BR0:1 CHAP: Using alternate hostname remote 
.d07h: BR0:1 LCP: O CONFREQ [Closed] id 70 len 27 
1d07h: BR0:1 LCP:    MagicNumber 0x175900B7 (0x0506175900B7) 
1d07h: BR0:1 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:1 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
1d07h: BR0:1 LCP:    LinkDiscriminator 118 (0x17040076) 
1d07h: BR0:1 LCP: I CONFREQ [REQsent] id 1 len 31 
1d07h: BR0:1 LCP:    AuthProto CHAP (0x0305C22305) 
1d07h: BR0:1 LCP:    MagicNumber 0x10DBA9A1 (0x050610DBA9A1) 
1d07h: BR0:1 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:1 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
1d07h: BR0:1 LCP:    LinkDiscriminator 24 (0x17040018) 
1d07h: BR0:1 LCP: O CONFACK [REQsent] id 1 len 31 
1d07h: BR0:1 LCP:    AuthProto CHAP (0x0305C22305) 
1d07h: BR0:1 LCP:    MagicNumber 0x10DBA9A1 (0x050610DBA9A1) 
1d07h: BR0:1 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:1 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
1d07h: BR0:1 LCP:    LinkDiscriminator 24 (0x17040018) 
1d07h: BR0:1 LCP: I CONFACK [ACKsent] id 70 len 27 
1d07h: BR0:1 LCP:    MagicNumber 0x175900B7 (0x0506175900B7) 
1d07h: BR0:1 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:1 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
1d07h: BR0:1 LCP:    LinkDiscriminator 118 (0x17040076) 
1d07h: BR0:1 LCP: State is Open 
1d07h: BR0:1 PPP: Phase is AUTHENTICATING, by the peer 
1d07h: BR0:1 CHAP: I CHALLENGE id 1 len 26 from "STACK" 
1d07h: BR0:1 CHAP: Using alternate hostname remote 
1d07h: BR0:1 CHAP: Username STACK not found 
.d07h: BR0:1 CHAP: Using default password 
1d07h: BR0:1 CHAP: O RESPONSE id 1 len 27 from "remote" 
1d07h: BR0:1 CHAP: I SUCCESS id 1 len 4 
1d07h: BR0:1 PPP: Phase is VIRTUALIZED 
1d07h: Vi2 PPP: Phase is DOWN, Setup 
1d07h: %LINK-3-UPDOWN: Interface Virtual-Access2, 
changed state to up 
1d07h: Virtual-Access2 DDR: Dialer statechange to up 
1d07h: Virtual-Access2 DDR: Dialer call has been placed 
1d07h: Vi2 PPP: Treating connection as a callout 
1d07h: Vi2 PPP: Phase is ESTABLISHING, Active Open 
1d07h: Vi2 PPP: No remote authentication for call-out 
1d07h: Vi2 CHAP: Using alternate hostname remote 
1d07h: Vi2 LCP: O CONFREQ [Closed] id 1 len 27 
1d07h: Vi2 LCP:    MagicNumber 0x17590D20 (0x050617590D20) 
1d07h: Vi2 LCP:    MRRU 1524 (0x110405F4) 
1d07h: Vi2 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
1d07h: Vi2 LCP:    LinkDiscriminator 119 (0x17040077) 
1d07h: Vi2 PPP: Phase is UP 
1d07h: Vi2 BACP: O CONFREQ [Closed] id 1 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
1d07h: Vi2 IPCP: O CONF.REQ [Closed] id 1 len 10 
1d07h: Vi2 IPCP:    Address 0.0.0.0 (0x030600000000) 
1d07h: BR0:1 MLP: STACK, multilink up, first link 
1d07h: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, 
changed state to up 
1d07h: %LINEPROTO-5-UPDOWN: Line protocol on 
Interface Virtual-Access2, 
changed state to up 
1d07h: Vi2 BACP: TIMEout: State REQsent 
1d07h: Vi2 BACP: O CONFREQ [REQsent] id 2 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
1d07h: Vi2 IPCP: TIMEout: State REQsent 
1d07h: Vi2 IPCP: O CONFREQ [REQsent] id 2 len 10 
1d07h: Vi2 IPCP:    Address 0.0.0.0 (0x030600000000) 
1d07h: %ISDN-6-CONNECT: Interface BRI0:1 is now connected 
to 8215 STACK. 
1d07h: Vi2 BACP: TIMEout: State REQsent 
1d07h: Vi2 BACP: O CONFREQ [REQsent] id 3 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
1d07h: Vi2 IPCP: TIMEout: State REQsent 
1d07h: Vi2 IPCP: O CONFREQ [REQsent] id 3 len 10 
1d07h: Vi2 IPCP:    Address 0.0.0.0 (0x030600000000) 
1d07h: Vi2 IPCP: I CONFREQ [REQsent] id 1 len 10 
1d07h: Vi2 IPCP:    Address 12.12.12.12 (0x03060C0C0C0C) 
1d07h: Vi2 IPCP: O CONFACK [REQsent] id 1 len 10 
1d07h: Vi2 IPCP:    Address 12.12.12.12 (0x03060C0C0C0C) 
1d07h: Vi2 PPP: Replace IPCP code 3 id 1 with id 2 
1d07h: Vi2 PPP: Replace IPCP code 3 id 2 with id 3 
1d07h: Vi2 BACP: I CONFREQ [REQsent] id 1 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0xE0714ACB (0x0106E0714ACB) 
1d07h: Vi2 BACP: O CONFACK [REQsent] id 1 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0xE0714ACB (0x0106E0714ACB) 
1d07h: Vi2 IPCP: I CONFNAK [ACKsent] id 3 len 10 
1d07h: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
1d07h: Vi2 IPCP: O CONFREQ [ACKsent] id 4 len 10 
1d07h: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
1d07h: Vi2 IPCP: I CONFACK [ACKsent] id 4 len 10 
1d07h: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
1d07h: Vi2 IPCP: State is Open 
1d07h: BR0 IPCP: Install negotiated 
IP interface address 12.12.12.13 
1d07h: Vi2 DDR: dialer protocol up 
1d07h: BR0 IPCP: Install route to 12.12.12.12. 
Success rate is 0 percent (0/5) 
tutu# 
tutu# 
tutu# 
tutu# 
1d07h: Vi2 BACP: TIMEout: State ACKsent 
1d07h: Vi2 BACP: O CONFREQ [ACKsent] id 4 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
1d07h: Vi2 BACP: I CONFREQ [ACKsent] id 2 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0xE0715041 (0x0106E0715041) 
1d07h: Vi2 BACP: O CONFACK [ACKsent] id 2 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0xE0715041 (0x0106E0715041) 
1d07h: Vi2 BACP: I CONFACK [ACKsent] id 4 len 10 
1d07h: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
1d07h: Vi2 BACP: State is Open 
1d07h: Vi2 BAP: Group "STACK" (29) (multilink) 
with precedence created 
1d07h: Vi2 DDR: dialer protocol upping 10.10.10.10 
  
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 10.10.10.10, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), 
round-trip min/avg/max = 36/37/40 ms 

tutu#ping 10.10.10.10 
  
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 10.10.10.10, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), 
round-trip min/avg/max = 36/39/52 ms 
tutu# 
1d07h: STACK BAP: Sending CallReq, id 50, len 42 on BR0:1 to remote 
1d07h: STACK BAP: O CallReq [Idle] id 50 len 38 
1d07h: STACK BAP:    LinkType 64 kbps type isdn (0x0105004001) 
1d07h: STACK BAP:    Reason Multilink bundle overloaded 
1d07h: STACK BAP:     (0x041D4D756C74696C696E6B2062756E64) 
1d07h: STACK BAP:     (0x6C65206F7665726C6F61646564) 
1d07h: Vi2 BAP: Received CallRsp, id 50, len 17 
1d07h: STACK BAP: I CallRsp [AddWait] id 50 len 21 ACK 
1d07h: STACK BAP:    LinkType 64 kbps type isdn (0x0105004001) 
1d07h: STACK BAP:    PhoneDelta 
1d07h: STACK BAP:       UniqueDigits 4 (0x010304) 
1d07h: STACK BAP:       SubscriberNumber 8218 
(0x020638323138)ping 10.10.10.10 
  
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 10.10.10.10, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), 
round-trip min/avg/max = 36/43/52 ms 
tutu# 
1d07h: STACK BAP: I CallRsp, id 50, ACK 
1d07h: STACK BAP: Attempt 1 to dial 8218 on BR0 
1d07h:    --> reason BAP - Multilink bundle overloaded 
1d07h: BR0 DDR: Attempting to dial 8218 
1d07h: ISDN BR0: TX >  SETUP pd = 8  callref = 0x63 
1d07h:         Bearer Capability i = 0x8890 
1d07h:         Channel ID i = 0x83 
1d07h:         Called Party Number i = 0x80, '8218', 
Plan:Unknown, Type:Unknown 
1d07h: ISDN BR0: RX <  CALL_PROC pd = 8  callref = 0xE3 
1d07h:         Channel ID i = 0x8A 
1d07h: ISDN BR0: RX <  PROGRESS pd = 8  callref = 0xE3 
1d07h:         Progress Ind i = 0x8188 - In-band info 
or appropriate now available 
1d07h: ISDN BR0: RX <  CONNECT pd = 8  callref = 0xE3 
1d07h: ISDN BR0: TX >  CONNECT_ACK pd = 8  callref = 0x63 
1d07h: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up 
1d07h: BR0:2 PPP: Treating connection as a callout 
1d07h: BR0:2 PPP: Phase is ESTABLISHING, Active Open 
1d07h: BR0:2 PPP: No remote authentication for call-out 
1d07h: BR0:2 CHAP: Using alternate hostname remote 
1d07h: BR0:2 LCP: O CONFREQ [Closed] id 67 len 27 
1d07h: BR0:2 LCP:    MagicNumber 0x17594A2E (0x050617594A2E) 
1d07h: BR0:2 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:2 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
1d07h: BR0:2 LCP:    LinkDiscriminator 120 (0x17040078) 
1d07h: BR0:2 LCP: I CONFREQ [REQsent] id 1 len 31 
1d07h: BR0:2 LCP:    AuthProto CHAP (0x0305C22305) 
1d07h: BR0:2 LCP:    MagicNumber 0xE70925D1 (0x0506E70925D1) 
1d07h: BR0:2 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:2 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
1d07h: BR0:2 LCP:    LinkDiscriminator 4 (0x17040004) 
1d07h: BR0:2 LCP: O CONFACK [REQsent] id 1 len 31 
1d07h: BR0:2 LCP:    AuthProto CHAP (0x0305C22305) 
1d07h: BR0:2 LCP:    MagicNumber 0xE70925D1 (0x0506E70925D1) 
1d07h: BR0:2 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:2 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
1d07h: BR0:2 LCP:    LinkDiscriminator 4 (0x17040004) 
1d07h: BR0:2 LCP: I CONFACK [ACKsent] id 67 len 27 
1d07h: BR0:2 LCP:    MagicNumber 0x17594A2E (0x050617594A2E) 
1d07h: BR0:2 LCP:    MRRU 1524 (0x110405F4) 
1d07h: BR0:2 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
1d07h: BR0:2 LCP:    LinkDiscriminator 120 (0x17040078) 
1d07h: BR0:2 LCP: State is Open 
1d07h: BR0:2 PPP: Phase is AUTHENTICATING, by the peer 
1d07h: BR0:2 CHAP: I CHALLENGE id 1 len 26 from "STACK" 
1d07h: BR0:2 CHAP: Using alternate hostname remote 
1d07h: BR0:2 CHAP: Username STACK not found 
1d07h: BR0:2 CHAP: Using default password 
1d07h: BR0:2 CHAP: O RESPONSE id 1 len 27 from "remote" 
1d08h: BR0:2 CHAP: I SUCCESS id 1 len 4 
1d08h: BR0:2 PPP: Phase is VIRTUALIZED 
1d08h: BR0:2 MLP: STACK, multilink up 
1d08h: STACK BAP: Sending StatusInd, id 50, len 48 on Vi2 to remote 
1d08h: STACK BAP: O StatusInd [AddPending] id 50 len 44 
1d08h: STACK BAP:    CallStatus success, Action no retry (0x06040000) 
1d08h: STACK BAP:    PhoneDelta 
1d08h: STACK BAP:       UniqueDigits 4 (0x010304) 
1d08h: STACK BAP:       SubscriberNumber 8218 (0x020638323138) 
1d08h: STACK BAP:    Reason Successfully added link 
1d08h: STACK BAP:     (0x04195375636365737366756C6C792061) 
1d08h: STACK BAP:     (0x64646564206C696E6B) 
1d08h: Vi2 BAP: Received StatusRsp, id 50, len 1 
1d08h: STACK BAP: I StatusRsp [AddPending] id 50 len 5 ACK 
1d08h: STACK BAP: I StatusRsp, id 50, ACK 
1d08h: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:2, 
changed state to up 
tutu# 
tutu# 
tutu# 
1d08h: %ISDN-6-CONNECT: Interface BRI0:1 is 
now connected to 8215 STACKsh user 
    Line       User       Host(s)             Idle       Location 
*  0 con 0               idle             ;     00:00:00 
  Vi2                    Virtual PPP (Bundle) 00:00:05 12.12.12.12 
  BR0:1                  Sync PPP                     -   Bundle: Vi2 
  BR0:2                  Sync PPP                     -   Bundle: Vi2 
  
  Interface  User      Mode             ;         Idle Peer Address 
  
tutu#show isdn ac 
----------------------------------------------------------------------- --------- 
                               ISDN ACTIVE CALLS 
----------------------------------------------------------------------- --------- 
Call    Calling      Called       Remote  Seconds Seconds Seconds Charges 
Type    Number       Number       Name    Used    Left    Idle    Units/Currency 
----------------------------------------------------------------------- --------- 
Out                  8215        STACK       32             1      0 
Out                  8218        STACK       13             1      0 
----------------------------------------------------------------------- ---------

Debug Output on the NAS

01:44:35: %LINK-3-UPDOWN: Interface Serial0:8, 
changed state to up 
01:44:35: Se0:8 PPP: Treating connection as a callin 
01:44:35: Se0:8 PPP: Phase is ESTABLISHING, Passive Open 
01:44:35: Se0:8 LCP: State is Listen 
01:44:35: Se0:8 LCP: I CONFREQ [Listen] id 70 len 27 
01:44:35: Se0:8 LCP:    MagicNumber 0x175900B7 (0x0506175900B7) 
01:44:35: Se0:8 LCP:    MRRU 1524 (0x110405F4) 
01:44:35: Se0:8 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
01:44:35: Se0:8 LCP:    LinkDiscriminator 118 (0x17040076) 
01:44:35: Se0:8 LCP: O CONFREQ [Listen] id 1 len 31 
01:44:35: Se0:8 LCP:    AuthProto CHAP (0x0305C22305) 
01:44:35: Se0:8 LCP:    MagicNumber 0x10DBA9A1 (0x050610DBA9A1) 
01:44:35: Se0:8 LCP:    MRRU 1524 (0x110405F4) 
01:44:35: Se0:8 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:44:35: Se0:8 LCP:    LinkDiscriminator 24 (0x17040018) 
01:44:35: Se0:8 LCP: O CONFACK [Listen] id 70 len 27 
01:44:35: Se0:8 LCP:    MagicNumber 0x175900B7 (0x0506175900B7) 
01:44:35: Se0:8 LCP:    MRRU 1524 (0x110405F4) 
01:44:35: Se0:8 LCP:    EndpointDisc 1 Local (0x13090172656D6F7465) 
01:44:35: Se0:8 LCP:    LinkDiscriminator 118 (0x17040076) 
01:44:35: Se0:8 LCP: I CONFACK [ACKsent] id 1 len 31 
01:44:35: Se0:8 LCP:    AuthProto CHAP (0x0305C22305) 
01:44:35: Se0:8 LCP:    MagicNumber 0x10DBA9A1 (0x050610DBA9A1) 
01:44:35: Se0:8 LCP:    MRRU 1524 (0x110405F4) 
01:44:35: Se0:8 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:44:35: Se0:8 LCP:    LinkDiscriminator 24 (0x17040018) 
01:44:35: Se0:8 LCP: State is Open 
01:44:35: Se0:8 PPP: Phase is AUTHENTICATING, by this end 
01:44:35: Se0:8 CHAP: O CHALLENGE id 1 len 26 from "STACK" 
01:44:35: Se0:8 CHAP: I RESPONSE id 1 len 27 from "remote" 
01:44:35: Se0:8 PPP: Phase is FORWARDING 
01:44:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0:8, 
changed state to up 
01:44:38: Se0:8 PPP: Phase is FORWARDED

Debug Output on the Offload Server

01:30:29: %LINK-3-UPDOWN: Interface Virtual-Access3, 
changed state to up 
01:30:29: Vi3 PPP: Treating connection as a dedicated line 
01:30:29: Vi3 PPP: Phase is ESTABLISHING, Active Open 
01:30:29: Vi3 LCP: O CONFREQ [Closed] id 1 len 31 
01:30:29: Vi3 LCP:    AuthProto CHAP (0x0305C22305) 
01:30:29: Vi3 LCP:    MagicNumber 0xE071382D (0x0506E071382D) 
01:30:29: Vi3 LCP:    MRRU 1524 (0x110405F4) 
01:30:29: Vi3 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:30:29: Vi3 LCP:    LinkDiscriminator 23 (0x17040017) 
01:30:29: Vi3 PPP: Treating connection as a dedicated line 
01:30:29: Vi3 LCP: I FORCED CONFREQ len 27 
01:30:29: Vi3 LCP:    AuthProto CHAP (0x0305C22305) 
01:30:29: Vi3 LCP:    MagicNumber 0x10DBA9A1 (0x050610DBA9A1) 
01:30:29: Vi3 LCP:    MRRU 1524 (0x110405F4) 
01:30:29: Vi3 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:30:29: Vi3 LCP:    LinkDiscriminator 24 (0x17040018) 
01:30:29: Vi3 PPP: Phase is AUTHENTICATING, by this end 
01:30:29: Vi3 CHAP: O CHALLENGE id 2 len 26 from "STACK" 
01:30:29: Vi3 CHAP: I RESPONSE id 1 len 27 from "remote" 
01:30:29: Vi3 CHAP: O SUCCESS id 1 len 4 
01:30:29: Vi3 PPP: Phase is VIRTUALIZED 
01:30:30: Vi3 BACP: I CONFREQ [Closed] id 1 len 10 
01:30:30: Vi3 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
01:30:30: Vi3 BACP: Lower layer not up, discarding packet 
01:30:30: Vi3 IPCP: Packet buffered while building MLP bundle interface 
01:30:30: Vi2 PPP: Phase is DOWN, Setup 
01:30:30: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access3, 
changed state to up 
01:30:32: Vi3 LCP: TIMEout: State Open 
01:30:32: Vi3 BACP: I CONFREQ [Closed] id 2 len 10 
01:30:32: Vi3 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
01:30:32: Vi3 BACP: Lower layer not up, discarding packet 
01:30:32: Vi3 IPCP: Packet buffered while building MLP 
bundle interface 
01:30:33: Vi3 BACP: I CONFREQ [Closed] id 3 len 10 
01:30:33: Vi3 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
01:30:34: Vi3 BACP: Lower layer not up, discarding packet 
01:30:34: Vi3 IPCP: Packet buffered while building MLP 
bundle interface 
01:30:34: %LINK-3-UPDOWN: Interface Virtual-Access2, 
changed state to up 
01:30:34: Vi2 PPP: Treating connection as a dedicated line 
01:30:34: Vi2 PPP: Phase is ESTABLISHING, Active Open 
01:30:34: Vi2 LCP: O CONFREQ [Closed] id 1 len 31 
01:30:34: Vi2 LCP:    AuthProto CHAP (0x0305C22305) 
01:30:34: Vi2 LCP:    MagicNumber 0xE0714AA6 (0x0506E0714AA6) 
01:30:34: Vi2 LCP:    MRRU 1524 (0x110405F4) 
01:30:34: Vi2 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:30:34: Vi2 LCP:    LinkDiscriminator 24 (0x17040018) 
01:30:34: Vi2 PPP: Phase is UP 
01:30:34: Vi2 IPCP: O CONFREQ [Closed] id 1 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.12 (0x03060C0C0C0C) 
01:30:34: Vi2 BACP: O CONFREQ [Closed] id 1 len 10 
01:30:34: Vi2 BACP:    FavoredPeer 0xE0714ACB (0x0106E0714ACB) 
01:30:34: Vi3 MLP: remote, multilink up, first link 
01:30:34: Vi2 PPP: Pending ncpQ size is 3 
01:30:34: Vi3 IPCP: Redirect packet to Vi2 
01:30:34: Vi2 IPCP: I CONFREQ [REQsent] id 1 len 10 
01:30:34: Vi2 IPCP:    Address 0.0.0.0 (0x030600000000) 
01:30:34: Vi2 IPCP: Pool returned 12.12.12.13 
01:30:34: Vi2 IPCP: O CONFNAK [REQsent] id 1 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
01:30:34: Vi3 IPCP: Redirect packet to Vi2 
01:30:34: Vi2 IPCP: I CONFREQ [REQsent] id 2 len 10 
01:30:34: Vi2 IPCP:    Address 0.0.0.0 (0x030600000000) 
01:30:34: Vi2 IPCP: O CONFNAK [REQsent] id 2 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
01:30:34: Vi3 IPCP: Redirect packet to Vi2 
01:30:34: Vi2 IPCP: I CONFREQ [REQsent] id 3 len 10 
01:30:34: Vi2 IPCP:    Address 0.0.0.0 (0x030600000000) 
01:30:34: Vi2 IPCP: O CONFNAK [REQsent] id 3 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
01:30:34: Vi2 IPCP: I CONFACK [REQsent] id 1 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.12 (0x03060C0C0C0C) 
01:30:34: Vi2 BACP: I CONFACK [REQsent] id 1 len 10 
01:30:34: Vi2 BACP:    FavoredPeer 0xE0714ACB (0x0106E0714ACB) 
01:30:34: Vi2 IPCP: I CONFREQ [ACKrcvd] id 4 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
01:30:34: Vi2 IPCP: O CONFACK [ACKrcvd] id 4 len 10 
01:30:34: Vi2 IPCP:    Address 12.12.12.13 (0x03060C0C0C0D) 
01:30:34: Vi2 IPCP: State is Open 
01:30:34: Vi2 IPCP: Install route to 12.12.12.13 
01:30:35: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, 
changed state to up 
01:30:35: Vi2 BACP: Negotiation timeout 
01:30:35: Vi2 BACP: State is Listen 
01:30:35: Vi2 BACP: I CONFREQ [Listen] id 4 len 10 
01:30:35: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
01:30:35: Vi2 BACP: O CONFREQ [Listen] id 2 len 10 
01:30:35: Vi2 BACP:    FavoredPeer 0xE0715041 (0x0106E0715041) 
01:30:35: Vi2 BACP: O CONFACK [Listen] id 4 len 10 
01:30:35: Vi2 BACP:    FavoredPeer 0x17590D2D (0x010617590D2D) 
01:30:35: Vi2 BACP: I CONFACK [ACKsent] id 2 len 10 
01:30:35: Vi2 BACP:    FavoredPeer 0xE0715041 (0x0106E0715041) 
01:30:35: Vi2 BACP: State is Open 
01:30:35: Vi2 BAP: Group "remote" (7) (multilink) 
without precedence created 
01:30:44: Vi2 BAP: Received CallReq, id 50, len 34 
01:30:44: remote BAP: I CallReq [Idle] id 50 len 38 
01:30:44: remote BAP:    LinkType 64 kbps type isdn (0x0105004001) 
01:30:44: remote BAP:    Reason Multilink bundle overloaded 
01:30:44: remote BAP:     (0x041D4D756C74696C696E6B2062756E64) 
01:30:44: remote BAP:     (0x6C65206F7665726C6F61646564) 
01:30:44: remote BAP: I CallReq, id 50 
01:30:44: remote BAP: Acknowledge CallReq, 
using digits default group number 
01:30:44: remote BAP: O ACK for CallReq, id 50 
01:30:44: remote BAP: Sending CallRsp, id 50, len 25 on Vi2 to remote 
01:30:44: remote BAP: O CallRsp [Idle] id 50 len 21 ACK 
01:30:44: remote BAP:    LinkType 64 kbps type isdn (0x0105004001) 
01:30:44: remote BAP:    PhoneDelta 
01:30:44: remote BAP:       UniqueDigits 4 (0x010304) 
01:30:44: remote BAP:       SubscriberNumber 8218 (0x020638323138) 
01:30:45: Vi1 PPP: Phase is DOWN, Setup 
01:30:48: %LINK-3-UPDOWN: Interface Virtual-Access1, 
changed state to up 
01:30:48: Vi1 PPP: Treating connection as a dedicated line 
01:30:48: Vi1 PPP: Phase is ESTABLISHING, Active Open 
01:30:48: Vi1 LCP: O CONFREQ [Closed] id 1 len 31 
01:30:48: Vi1 LCP:    AuthProto CHAP (0x0305C22305) 
01:30:48: Vi1 LCP:    MagicNumber 0xE07181A5 (0x0506E07181A5) 
01:30:48: Vi1 LCP:    MRRU 1524 (0x110405F4) 
01:30:48: Vi1 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:30:48: Vi1 LCP:    LinkDiscriminator 25 (0x17040019) 
01:30:48: Vi1 PPP: Treating connection as a dedicated line 
01:30:48: Vi1 LCP: I FORCED CONFREQ len 27 
01:30:48: Vi1 LCP:    AuthProto CHAP (0x0305C22305) 
01:30:48: Vi1 LCP:    MagicNumber 0xE70925D1 (0x0506E70925D1) 
01:30:48: Vi1 LCP:    MRRU 1524 (0x110405F4) 
01:30:48: Vi1 LCP:    EndpointDisc 1 Local (0x130801535441434B) 
01:30:48: Vi1 LCP:    LinkDiscriminator 4 (0x17040004) 
01:30:48: Vi1 PPP: Phase is AUTHENTICATING, by this end 
01:30:48: Vi1 CHAP: O CHALLENGE id 2 len 26 from "STACK" 
01:30:48: Vi1 CHAP: I RESPONSE id 1 len 27 from "remote" 
01:30:48: Vi1 CHAP: O SUCCESS id 1 len 4 
01:30:48: Vi1 PPP: Phase is VIRTUALIZED 
01:30:48: Vi1 MLP: remote, multilink up 
01:30:48: Vi2 BAP: Received StatusInd, id 50, len 40 
01:30:48: remote BAP: I StatusInd [AddPending] id 50 len 44 
01:30:48: remote BAP:    CallStatus success, 
Action no retry (0x06040000) 
01:30:48: remote BAP:    PhoneDelta 
01:30:48: remote BAP:       UniqueDigits 4 (0x010304) 
01:30:48: remote BAP:       SubscriberNumber 8218 (0x020638323138) 
01:30:48: remote BAP:    Reason Successfully added link 
01:30:48: remote BAP:     (0x04195375636365737366756C6C792061) 
01:30:48: remote BAP:     (0x64646564206C696E6B) 
01:30:48: remote BAP: I StatusInd, id 50 
01:30:48: remote BAP: O ACK for StatusInd, id 50 
01:30:48: remote BAP: Sending StatusRsp, id 50, len 9 on Vi2 to remote 
01:30:48: remote BAP: O StatusRsp [Idle] id 50 len 5 ACK 
01:30:49: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, 
changed state to up 
01:30:50: Vi1 LCP: TIMEout: State Open 
tango(config-if)# 
tango(config-if)# 
tango(config-if)#^Z 
tango#show users 
    Line       User       Host(s)             Idle       Location 
        *  0 con 0               idle             ;     00:00:00 
  Vi1          remote     Virtual PPP (L2F   )        - 0.0.0.0 
  Vi2          remote     Virtual PPP (Bundle) 00:00:04 12.12.12.13 
  Vi3          remote     Virtual PPP (L2F   )        - 0.0.0.0 
  
  Interface  User      Mode             ;         Idle Peer Address

NetPro Discussion Forums - Featured Conversations

Networking Professionals Connection is a forum for networking professionals to share questions, suggestions, and information about networking solutions, products, and technologies. The featured links are some of the most recent conversations available in this technology.

NetPro Discussion Forums - Featured Conversations for Access

Network Infrastructure: Remote Access

Related Information

Updated: Nov 15, 2007

Document ID: 10323

Hierarchical Navigation

Point-to-Point Protocol (PPP)