配置用 Dialer Watch的 AUX 端口间异步备份

下载选项

PDF (288.7 KB)
在各种设备上使用 Adobe Reader 查看
ePub (99.4 KB)
在 iPhone、iPad、Android、Sony Reader 或 Windows Phone 上使用各种应用查看
Mobi (Kindle) (108.9 KB)
在 Kindle 设备上查看或在多个设备上使用 Kindle 应用查看

已更新: 2010 年 2 月 4 日

文档 ID:10305

非歧视性语言

此产品的文档集力求使用非歧视性语言。在本文档集中，非歧视性语言是指不隐含针对年龄、残障、性别、种族身份、族群身份、性取向、社会经济地位和交叉性的歧视的语言。由于产品软件的用户界面中使用的硬编码语言、基于 RFP 文档使用的语言或引用的第三方产品使用的语言，文档中可能无法确保完全使用非歧视性语言。深入了解思科如何使用包容性语言。

关于此翻译

思科采用人工翻译与机器翻译相结合的方式将此文档翻译成不同语言，希望全球的用户都能通过各自的语言得到支持性的内容。请注意：即使是最好的机器翻译，其准确度也不及专业翻译人员的水平。 Cisco Systems, Inc. 对于翻译的准确性不承担任何责任，并建议您总是参考英文原始文档（已提供链接）。

简介

本文档提供有关使用拨号器监视功能为串行、WAN或租用线路链路配置按需拨号路由(DDR)备份的信息。备用链路在两台路由器的AUX端口上使用调制解调器。当主链路断开时，拨号器监视使用AUX端口上的调制解调器启动备份拨出。

先决条件

要求

本文档假设您对AUX端口上调制解调器的各种问题有充分的了解。如果需要有关这些问题的详细信息，请参阅文档调制解调器 — 路由器连接指南和在AUX端口上使用调制解调器配置拨出，然后再继续本文档。

使用的组件

本文档中的信息基于以下软件和硬件版本：

两个Cisco 2600，带US Robotics调制解调器，连接到AUX端口。两台路由器都运行Cisco IOS®软件版本12.1(2)。

建议您使用Cisco IOS 12.1(7)版或更高版本，其中包括对影响拨号器监视的IOS错误的修复。

本文档中的信息都是基于特定实验室环境中的设备创建的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您是在真实网络上操作，请确保您在使用任何命令前已经了解其潜在影响。

背景理论

此场景包括在AUX端口上使用调制解调器配置拨入和拨出，以及使用拨号器监视配置DDR备份。有关拨号器监视功能的详细信息，请参阅评估备份接口、浮动静态路由和DDR备份的拨号器监视。

有关如何配置和排除拨号器监视故障的信息，请参阅使用BRI和拨号器监视配置DDR备份。拨号器监视所涉及的概念与所使用的介质无关，因此该文档对拨号器监视问题非常有用。

配置

本部分提供有关如何配置本文档所述功能的信息。

注：要查找有关本文档中使用的命令的其他信息，请使用命令查找工具(仅注册客户)。

在此配置中，maui-rtr-10（客户端）通过串行链路连接到maui-rtr-11（中心站点）。两台路由器还将外部US Robotics调制解调器连接到AUX端口并用作备份。当主链路断开时，dialer watch会启动备份链路，maui-rtr-10会拨打中心站点路由器、连接、协商PPP并交换开放最短路径优先(OSPF)路由信息。路由器之间的所有流量现在都使用备份连接。重新建立主链路后，路由表会更新，所有流量都会再次使用主链路。由于备份链路上没有流量，因此空闲超时过期，拨号程序观察会断开备份链路。

maui-rtr-10（客户端）
maui-rtr-10#show running-config Building configuration... Current configuration: ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname maui-rtr-10 ! aaa new-model aaa authentication login default local aaa authentication login NO_AUTHEN none aaa authentication ppp default local !--- This is the basic AAA configuration for PPP calls. enable secret 5 <deleted> ! username admin password 0 <deleted> username maui-rtr-11 password 0 cisco !--- Username for remote router (maui-rtr-11) and shared secret !--- password. Shared secret (used for Challenge Handshake Authentication !--- Protocol [CHAP] authentication) must be the same on both sides. ! ip subnet-zero ! chat-script Dialout ABORT ERROR ABORT BUSY "" "AT" OK "ATDT \T" TIMEOUT 45 CONNECT \c !--- Chat script named "Dialout" is used for the backup dialout. modemcap entry MY_USR_MODEM:MSC=&F1S0;=1 !--- Modemcap named "MY_USR_MODEM" will be applied to the AUX !--- port line interface. This modemcap was created with the !--- modemcap edit MY_USR_MODEM miscellaneous &F1S0;=1 command !--- Refer to the Modem-Router Connection Guide for more information. ! interface Loopback0 ip address 172.17.1.1 255.255.255.0 ! interface Ethernet0/0 ip address 172.16.1.1 255.255.255.0 no keepalive ! interface Serial0/0 no ip address shutdown no fair-queue ! interface Serial0/1 !--- This is the primary link. ip address 192.168.10.2 255.255.255.252 encapsulation ppp clockrate 64000 ppp authentication chap ! interface Async65 !--- Async interface corresponding to the AUX Port (backup link). !--- This was determined using the show line* command.* ip unnumbered Loopback0 !--- This assigns the Loopback 0 IP address to this interface. !--- The central router will have a dialer map to this loopback address. encapsulation ppp dialer in-band !--- Allow DDR on this interface. dialer idle-timeout 30 !--- Idle timeout (in seconds) for this link. !--- Dialer watch checks the status of the primary link !--- every time the idle-timeout expires. dialer watch-disable 15 !--- Delays disconnection of the backup interface (for 15 seconds) after !--- the primary interface is found to be up. dialer map ip 172.22.1.1 name maui-rtr-11 broadcast 84007 !--- Dialer map for the AUX Port interface of the central router. !--- Remember that the central router's AUX port is unnumbered to its Loopback 0. dialer map ip 172.22.53.0 name maui-rtr-11 broadcast 84007 !--- Map statement for the route or network being watched. !--- Address must exactly match the network configured with !--- the dialer watch-list command. !--- Dials the phone number specified when the watched route disappears. dialer watch-group 8 !--- Enable dialer watch on this backup interface. !--- Watch the route specified with dialer watch-list 8. dialer-group 1 !--- Apply interesting traffic defined in dialer-list 1. async default routing !--- Permit routing over the async interface. !--- This is required for a routing protocol to run across the async link. async mode interactive ppp authentication chap ! router ospf 5 network 172.16.1.0 0.0.0.255 area 0 network 172.17.1.0 0.0.0.255 area 0 network 192.168.10.0 0.0.0.3 area 0 ! ip classless no ip http server ! access-list 101 remark Define Interesting Traffic access-list 101 deny ospf any any !--- Mark OSPF as uninteresting. !--- This prevents OSPF hellos from keeping the link up. access-list 101 permit ip any any ! dialer watch-list 8 ip 172.22.53.0 255.255.255.0 !--- Define the route to be watched. !--- This exact route (including subnet mask) must exist in the routing table. dialer-list 1 protocol ip list 101 !--- Interesting traffic is defined by access-list 101. !--- This is applied to BRI0 using dialer-group 1. ! line con 0 login authentication NO_AUTHEN transport input none line Aux 0 !--- Line configuration for the AUX port. exec-timeout 0 0 !--- Disable exec timeout on the interface. autoselect ppp script dialer Dialout !--- Use the chat script named "Dialout" for outgoing calls. modem InOut !--- Enable incoming and outgoing calls. modem autoconfigure type MY_USR_MODEM !--- Apply the modemcap MY_USR_MODEM (configured previously) !--- to initialize the modem. transport input all stopbits 1 !--- Improve throughput by reducing async framing overhead. speed 115200 !--- AUX port on the 2600 supports a speed of 115200. !--- Note: If you are routing through the AUX port, each character generates a !--- processor interrupt. This is an abnormally high load on the CPU, which can be !--- resolved by using a lower AUX port speed. flowcontrol hardware !--- This configures Ready To Send/Clear To Send (RTS/CTS) flow control. line vty 0 4 ! no scheduler allocate end

maui-rtr-10（客户端）

maui-rtr-10#show running-config
Building configuration...

Current configuration:
!
version 12.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname maui-rtr-10
!
aaa new-model
aaa authentication login default local
aaa authentication login NO_AUTHEN none
aaa authentication ppp default local

!--- This is the basic AAA configuration for PPP calls.

enable secret 5 <deleted>
!
username admin password 0 <deleted>
username maui-rtr-11 password 0 cisco

!--- Username for remote router (maui-rtr-11) and shared secret !--- password. Shared secret (used for Challenge Handshake Authentication !--- Protocol [CHAP] authentication) must be the same on both sides.

!
ip subnet-zero
!
chat-script Dialout ABORT ERROR ABORT BUSY "" "AT" OK "ATDT \T" TIMEOUT 45
CONNECT \c

!--- Chat script named "Dialout" is used for the backup dialout.

modemcap entry MY_USR_MODEM:MSC=&F1S0;=1

!--- Modemcap named "MY_USR_MODEM" will be applied to the AUX !--- port line interface. This modemcap was created with the !--- modemcap edit MY_USR_MODEM miscellaneous &F1S0;=1 command !--- Refer to the Modem-Router Connection Guide for more information.

!
interface Loopback0
ip address 172.17.1.1 255.255.255.0
!
interface Ethernet0/0
ip address 172.16.1.1 255.255.255.0
no keepalive
!
interface Serial0/0
no ip address
shutdown
no fair-queue
!
interface Serial0/1

!--- This is the primary link.

ip address 192.168.10.2 255.255.255.252
encapsulation ppp
clockrate 64000
ppp authentication chap
!
interface Async65

!--- Async interface corresponding to the AUX Port (backup link). !--- This was determined using the show line command.

ip unnumbered Loopback0

!--- This assigns the Loopback 0 IP address to this interface. !--- The central router will have a dialer map to this loopback address.

encapsulation ppp
dialer in-band

!--- Allow DDR on this interface.

dialer idle-timeout 30

!--- Idle timeout (in seconds) for this link. !--- Dialer watch checks the status of the primary link !--- every time the idle-timeout expires.

dialer watch-disable 15

!--- Delays disconnection of the backup interface (for 15 seconds) after !--- the primary interface is found to be up.

dialer map ip 172.22.1.1 name maui-rtr-11 broadcast 84007

!--- Dialer map for the AUX Port interface of the central router. !--- Remember that the central router's AUX port is unnumbered to its Loopback 0.

dialer map ip 172.22.53.0 name maui-rtr-11 broadcast 84007

!--- Map statement for the route or network being watched. !--- Address must exactly match the network configured with !--- the dialer watch-list command. !--- Dials the phone number specified when the watched route disappears.

dialer watch-group 8

!--- Enable dialer watch on this backup interface. !--- Watch the route specified with dialer watch-list 8.

dialer-group 1

!--- Apply interesting traffic defined in dialer-list 1.

async default routing

!--- Permit routing over the async interface. !--- This is required for a routing protocol to run across the async link.

async mode interactive
ppp authentication chap
!
router ospf 5
network 172.16.1.0 0.0.0.255 area 0
network 172.17.1.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.3 area 0
!
ip classless
no ip http server
!
access-list 101 remark Define Interesting Traffic
access-list 101 deny ospf any any

!--- Mark OSPF as uninteresting. !--- This prevents OSPF hellos from keeping the link up.

access-list 101 permit ip any any
!
dialer watch-list 8 ip 172.22.53.0 255.255.255.0

!--- Define the route to be watched. !--- This exact route (including subnet mask) must exist in the routing table.

dialer-list 1 protocol ip list 101

!--- Interesting traffic is defined by access-list 101. !--- This is applied to BRI0 using dialer-group 1.

!
line con 0
login authentication NO_AUTHEN
transport input none
line Aux 0

!--- Line configuration for the AUX port.

exec-timeout 0 0

!--- Disable exec timeout on the interface.

autoselect ppp
script dialer Dialout

!--- Use the chat script named "Dialout" for outgoing calls.

modem InOut

!--- Enable incoming and outgoing calls.

modem autoconfigure type MY_USR_MODEM

!--- Apply the modemcap MY_USR_MODEM (configured previously) !--- to initialize the modem.

transport input all
stopbits 1

!--- Improve throughput by reducing async framing overhead.

speed 115200

!--- AUX port on the 2600 supports a speed of 115200. !--- Note: If you are routing through the AUX port, each character generates a !--- processor interrupt. This is an abnormally high load on the CPU, which can be !--- resolved by using a lower AUX port speed.

flowcontrol hardware

!--- This configures Ready To Send/Clear To Send (RTS/CTS) flow control.

line vty 0 4
!
no scheduler allocate
end

maui-rtr-11（中心站点）
maui-rtr-11#show running-config Building configuration... Current configuration: ! version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname maui-rtr-11 ! aaa new-model aaa authentication login default local aaa authentication login NO_AUTHEN none aaa authentication ppp default local !--- This is the basic AAA configuration for PPP calls. enable secret 5 <deleted> ! username admin password 0 <deleted> username maui-rtr-10 password 0 cisco !--- Username for remote router (maui-rtr-10) and shared secret. !--- Shared secret (used for CHAP authentication) must be the same on both sides. ! memory-size iomem 30 ! ip subnet-zero ! modemcap entry MY_USR_MODEM:MSC=&F1S0;=1 !--- Modemcap (MY_USR_MODEM) will be applied to the AUX port line interface. !--- This modemcap was created with the command !--- modemcap edit MY_USR_MODEM miscellaneous &F1S0;=1 !--- Refer to the Modem-Router Connection Guide for more information. ! interface Loopback0 ip address 172.22.1.1 255.255.255.0 ! interface FastEthernet0/0 !--- Interface to corporate network. ip address 172.22.53.105 255.255.255.0 no keepalive duplex auto speed auto ! !--- Irrelevant output removed here. ! interface Serial0/1 !--- This is the primary link. ip address 192.168.10.1 255.255.255.252 encapsulation ppp ppp authentication chap ! interface Serial0/2 no ip address shutdown ! interface Async65 !--- Async interface corresponding to the AUX Port (backup link). !--- This was determined using the show line* command.* ip unnumbered Loopback0 !--- Use Loopback 0 address for this interface. !--- The remote router will have a dialer map to this loopback address. encapsulation ppp dialer in-band dialer idle-timeout 900 dialer map ip 172.17.1.1 name maui-rtr-10 broadcast !--- Dialer map for the AUX Port interface of the remote router. !--- Remember that the remote router AUX port is unnumbered to its Loopback 0. dialer-group 1 !--- Apply interesting traffic defined in dialer-list 1. async default routing !--- Permit routing over the async interface. !--- This is required for a routing protocol to run across the async link. async mode interactive !--- Requires autoselect PPP under the line configuration PPP to be negotiated. !--- This command may be replaced with async mode dedicated. no peer default ip address !--- Do not assign the peer an IP address. ppp authentication chap ! router ospf 5 network 172.22.1.0 0.0.0.255 area 0 network 172.22.53.0 0.0.0.255 area 0 network 192.168.10.0 0.0.0.3 area 0 ! ip classless no ip http server ! dialer-list 1 protocol ip permit !--- Mark all IP traffic as interesting. !--- This interesting traffic definition is applied to BRI0 !--- using dialer-group 1. ! ! line con 0 login authentication NO_AUTHEN transport input none line aux 0 !--- AUX Port line configuration. autoselect ppp !--- Launch PPP negotiation when PPP packets are received. !--- If the Async Interface has async mode dedicated, !--- this command is not needed. modem InOut !--- Enable incoming and outgoing calls. modem autoconfigure type MY_USR_MODEM !--- Apply the modemcap MY_USR_MODEM that was configured previously. transport input all stopbits 1 !--- Improve throughput by reducing async framing overhead. speed 115200 !--- AUX port on the 2600 supports a speed of 115200. flowcontrol hardware !--- Configures RTS/CTS flow control. line vty 0 4 ! no scheduler allocate end

maui-rtr-11（中心站点）

maui-rtr-11#show running-config
Building configuration...

Current configuration:
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname maui-rtr-11
!
aaa new-model
aaa authentication login default local
aaa authentication login NO_AUTHEN none
aaa authentication ppp default local

!--- This is the basic AAA configuration for PPP calls.

enable secret 5 <deleted>
!
username admin password 0 <deleted>
username maui-rtr-10 password 0 cisco

!--- Username for remote router (maui-rtr-10) and shared secret. !--- Shared secret (used for CHAP authentication) must be the same on both sides.

!
memory-size iomem 30
!
ip subnet-zero
!
modemcap entry MY_USR_MODEM:MSC=&F1S0;=1

!--- Modemcap (MY_USR_MODEM) will be applied to the AUX port line interface. !--- This modemcap was created with the command !--- modemcap edit MY_USR_MODEM miscellaneous &F1S0;=1 !--- Refer to the Modem-Router Connection Guide for more information.

!
interface Loopback0
ip address 172.22.1.1 255.255.255.0
!
interface FastEthernet0/0

!--- Interface to corporate network.

ip address 172.22.53.105 255.255.255.0
no keepalive
duplex auto
speed auto
!

!--- Irrelevant output removed here.

!
interface Serial0/1

!--- This is the primary link.

ip address 192.168.10.1 255.255.255.252
encapsulation ppp
ppp authentication chap
!
interface Serial0/2
no ip address
shutdown
!
interface Async65

!--- Async interface corresponding to the AUX Port (backup link). !--- This was determined using the show line command.

ip unnumbered Loopback0

!--- Use Loopback 0 address for this interface. !--- The remote router will have a dialer map to this loopback address.

encapsulation ppp
dialer in-band
dialer idle-timeout 900
dialer map ip 172.17.1.1 name maui-rtr-10 broadcast

!--- Dialer map for the AUX Port interface of the remote router. !--- Remember that the remote router AUX port is unnumbered to its Loopback 0.

dialer-group 1

!--- Apply interesting traffic defined in dialer-list 1.

async default routing

!--- Permit routing over the async interface. !--- This is required for a routing protocol to run across the async link.

async mode interactive

!--- Requires autoselect PPP under the line configuration PPP to be negotiated. !--- This command may be replaced with async mode dedicated.

no peer default ip address

!--- Do not assign the peer an IP address.

ppp authentication chap
!
router ospf 5
network 172.22.1.0 0.0.0.255 area 0
network 172.22.53.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.3 area 0
!
ip classless
no ip http server
!
dialer-list 1 protocol ip permit

!--- Mark all IP traffic as interesting. !--- This interesting traffic definition is applied to BRI0 !--- using dialer-group 1.

!
!
line con 0
login authentication NO_AUTHEN
transport input none
line aux 0

!--- AUX Port line configuration.

autoselect ppp

!--- Launch PPP negotiation when PPP packets are received. !--- If the Async Interface has async mode dedicated, !--- this command is not needed.

modem InOut

!--- Enable incoming and outgoing calls.

modem autoconfigure type MY_USR_MODEM

!--- Apply the modemcap MY_USR_MODEM that was configured previously.

transport input all
stopbits 1

!--- Improve throughput by reducing async framing overhead.

speed 115200

!--- AUX port on the 2600 supports a speed of 115200.

flowcontrol hardware

!--- Configures RTS/CTS flow control.

line vty 0 4
!
no scheduler allocate
end

验证

本部分提供的信息可帮助您确认您的配置是否可正常运行。

某些show命令受输出解释器工具的支持(只用于注册的用户)，允许您查看对show命令输出的分析。

show 输出示例

具有主链路功能的客户端(maui-rtr-10)的路由表如下所示：

maui-rtr-10#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     192.168.10.0/24 is variably subnetted, 2 subnets, 2 masks
C       192.168.10.0/30 is directly connected, Serial0/1
C       192.168.10.1/32 is directly connected, Serial0/1
     172.17.0.0/24 is subnetted, 1 subnets
C       172.17.1.0 is directly connected, Loopback0
     172.16.0.0/24 is subnetted, 1 subnets
C       172.16.1.0 is directly connected, Ethernet0/0
     172.22.0.0/16 is variably subnetted, 2 subnets, 2 masks
O       172.22.53.0/24 [110/65] via 192.168.10.1, 00:00:57, Serial0/1
O       172.22.1.1/32 [110/65] via 192.168.10.1, 00:00:59, Serial0/1

上面show ip route命令输出显示了使用主链路(serial 0/1)从对等体获取的OSPF路由。注意，路由表中存在被监视的路由（掩码为255.255.255.0的172.22.53.0）。必须验证这一点，拨号器监视才能正常运行。

现在主链路已关闭，拨号器监视激活备用链路。

激活备用链路后，交换OSPF表，并安装使用备用链路的新路由。流量现在通过备用链路。相应示例如下：

maui-rtr-10#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.17.0.0/24 is subnetted, 1 subnets
C       172.17.1.0 is directly connected, Loopback0
     172.16.0.0/24 is subnetted, 1 subnets
C       172.16.1.0 is directly connected, Ethernet0/0
     172.22.0.0/16 is variably subnetted, 2 subnets, 2 masks
O       172.22.53.0/24 [110/870] via 172.22.1.1, 00:00:11, Async65
C       172.22.1.1/32 is directly connected, Async65

上述输出显示路由表已更新，且受监视网络的所有流量现在都使用备份链路(Async 65)。

故障排除

本部分提供的信息可用于对配置进行故障排除。

故障排除命令

某些show命令受输出解释器工具的支持(只用于注册的用户)，允许您查看对show命令输出的分析。

注意：在发出debug命令之前，请参阅有关debug命令的重要信息。

debug dialer — 显示有关在拨号器接口上接收的数据包的调试信息。在接口上启用DDR时，还会显示有关任何呼叫原因（称为拨号原因）的信息。有关详细信息，请参阅Debug Commands文档中的debug dialer信息。
debug modem — 显示路由器上的调制解调器线路活动、调制解调器控制和进程激活消息。
debug chat — 在启动异步/POTS拨号时监控聊天脚本的执行。请参阅拨号技术：故障排除技术。
debug ppp negotiation — 在协商PPP组件(包括链路控制协议(LCP)、身份验证和网络控制协议(NCP))时显示有关PPP流量和交换的信息。一个成功的PPP协商协议首先开启LCP状态，然后是鉴权，最后协商NCP。
debug ppp authentication — 显示PPP身份验证协议消息，包括质询身份验证协议(CHAP)数据包交换和密码身份验证协议(PAP)交换

调试输出示例

以下调试输出显示主链路发生故障，拨号器观察识别丢失的路由。然后，路由器启动备用链路。在拨号器空闲超时到期后，路由器检查主链路是否关闭。当重新建立主链路时，拨号器监视会在禁用计时器到期后断开备用链路。查看调试时，请注意每条消息中的时间戳，因为它们可以提供有关活动的各种计时器和空闲超时的信息。

maui-rtr-10#debug dialer
Dial on demand events debugging is on
maui-rtr-10#debug chat
Chat scripts activity debugging is on
maui-rtr-10#debug modem
Modem control/process activation debugging is on
maui-rtr-10#debug ppp negotiation 
PPP protocol negotiation debugging is on
maui-rtr-10#debug ppp authentication
PPP authentication debugging is on
maui-rtr-10#
maui-rtr-10#
maui-rtr-10#
maui-rtr-10#
maui-rtr-10#
*Mar  3 17:00:28.136: %LINK-3-UPDOWN: Interface Serial0/1, 
changed state to down

!--- Primary link is brought down.

*Mar  3 17:00:28.140: Se0/1 IPCP: State is Closed
*Mar  3 17:00:28.140: Se0/1 CDPCP: State is Closed
*Mar  3 17:00:28.140: Se0/1 PPP: Phase is TERMINATING
*Mar  3 17:00:28.140: Se0/1 LCP: State is Closed
*Mar  3 17:00:28.140: Se0/1 PPP: Phase is DOWN
*Mar  3 17:00:28.144: Se0/1 IPCP: Remove route to 192.168.10.1
*Mar  3 17:00:28.252: DDR: Dialer Watch: watch-group = 8

!--- Use dialer watch-group 8.

*Mar  3 17:00:28.252: DDR:        network 172.22.53.0/255.255.255.0 DOWN,
*Mar  3 17:00:28.252: DDR:        primary DOWN

!--- The primary network is down.

*Mar  3 17:00:28.252: DDR: Dialer Watch: 
Dial Reason: Primary of group 8 DOWN

!--- Dial reason is that the primary route is down.

*Mar  3 17:00:28.252: DDR: Dialer Watch: watch-group = 8, 
*Mar  3 17:00:28.252: DDR:        
dialing secondary by dialer map 172.22.53.0 on As65

!--- Indicates which dialer map statement is used for the dialout. !--- Dialout will occur on AS 65 (the AUX Port).

*Mar  3 17:00:28.252: As65 DDR: Attempting to dial 84007

!--- Number being dialed for the backup link.

*Mar  3 17:00:28.252: CHAT65: Attempting async line dialer script
*Mar  3 17:00:28.256: CHAT65: Dialing using Modem script: Dialout
 & System script: none

!--- Using chat script "Dialout".

*Mar  3 17:00:28.268: CHAT65: process started
*Mar  3 17:00:28.273: CHAT65: Asserting DTR
*Mar  3 17:00:28.273: TTY65: Set DTR to 1
*Mar  3 17:00:28.273: CHAT65: Chat script Dialout started

!--- Chat script "Dialout" starts.

*Mar  3 17:00:28.273: CHAT65: Sending string: AT
*Mar  3 17:00:28.273: CHAT65: Expecting string: OK
*Mar  3 17:00:28.433: CHAT65: Completed match for expect: OK
*Mar  3 17:00:28.433: CHAT65: Sending string: ATDT \T<84007>
*Mar  3 17:00:28.433: CHAT65: Expecting string: CONNECT
*Mar  3 17:00:29.138: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1,
 changed state to down
*Mar  3 17:00:42.560: CHAT65: Completed match for expect: CONNECT
*Mar  3 17:00:42.560: CHAT65: Sending string: \c
*Mar  3 17:00:42.560: CHAT65: Chat script 
Dialout finished, status = Success

!--- Chat script is successful. !--- Notice the Expect/Send Attributes and the time elapsed.

*Mar  3 17:00:42.564: TTY65: destroy timer type 1
*Mar  3 17:00:42.564: TTY65: destroy timer type 0
*Mar  3 17:00:42.568: As65 IPCP: Install route to 172.22.53.0
*Mar  3 17:00:44.567: %LINK-3-UPDOWN: Interface Async65, changed state to up
 Dialer statechange to up Async65
*Mar  3 17:00:44.571: As65 DDR: Dialer Watch: resetting call in progress
 Dialer call has been placed Async65
*Mar  3 17:00:44.571: As65 PPP: Treating connection as a callout

!--- PPP negotiation begins.

*Mar  3 17:00:44.571: As65 PPP: Phase is ESTABLISHING, Active Open
*Mar  3 17:00:44.571: As65 LCP: O CONFREQ [Closed] id 11 len 25
*Mar  3 17:00:44.571: As65 LCP:    ACCM 0x000A0000 (0x0206000A0000)
*Mar  3 17:00:44.575: As65 LCP:    AuthProto CHAP (0x0305C22305)
*Mar  3 17:00:44.575: As65 LCP:    MagicNumber 0x103EC1ED (0x0506103EC1ED)
*Mar  3 17:00:44.575: As65 LCP:    PFC (0x0702)
*Mar  3 17:00:44.575: As65 LCP:    ACFC (0x0802)
*Mar  3 17:00:46.575: As65 LCP: TIMEout: State REQsent
*Mar  3 17:00:46.575: As65 LCP: O CONFREQ [REQsent] id 12 Len 25
*Mar  3 17:00:46.575: As65 LCP:    ACCM 0x000A0000 (0x0206000A0000)
*Mar  3 17:00:46.575: As65 LCP:    AuthProto CHAP (0x0305C22305)
*Mar  3 17:00:46.575: As65 LCP:    MagicNumber 0x103EC1ED (0x0506103EC1ED)
*Mar  3 17:00:46.575: As65 LCP:    PFC (0x0702)
*Mar  3 17:00:46.575: As65 LCP:    ACFC (0x0802)
*Mar  3 17:00:46.703: As65 LCP: I CONFACK [REQsent] id 12 Len 25
*Mar  3 17:00:46.707: As65 LCP:    ACCM 0x000A0000 (0x0206000A0000)
*Mar  3 17:00:46.707: As65 LCP:    AuthProto CHAP (0x0305C22305)
*Mar  3 17:00:46.707: As65 LCP:    MagicNumber 0x103EC1ED (0x0506103EC1ED)
*Mar  3 17:00:46.707: As65 LCP:    PFC (0x0702)
*Mar  3 17:00:46.707: As65 LCP:    ACFC (0x0802)
*Mar  3 17:00:46.715: As65 LCP: I CONFREQ [ACKrcvd] id 21 Len 25
*Mar  3 17:00:46.715: As65 LCP:    ACCM 0x000A0000 (0x0206000A0000)
*Mar  3 17:00:46.715: As65 LCP:    AuthProto CHAP (0x0305C22305)
*Mar  3 17:00:46.719: As65 LCP:    MagicNumber 0x30CB092E (0x050630CB092E)
*Mar  3 17:00:46.719: As65 LCP:    PFC (0x0702)
*Mar  3 17:00:46.719: As65 LCP:    ACFC (0x0802)
*Mar  3 17:00:46.719: As65 LCP: O CONFACK [ACKrcvd] id 21 Len 25
*Mar  3 17:00:46.719: As65 LCP:    ACCM 0x000A0000 (0x0206000A0000)
*Mar  3 17:00:46.719: As65 LCP:    AuthProto CHAP (0x0305C22305)
*Mar  3 17:00:46.723: As65 LCP:    MagicNumber 0x30CB092E (0x050630CB092E)
*Mar  3 17:00:46.723: As65 LCP:    PFC (0x0702)
*Mar  3 17:00:46.723: As65 LCP:    ACFC (0x0802)
*Mar  3 17:00:46.723: As65 LCP: State is Open
*Mar  3 17:00:46.723: As65 PPP: Phase is AUTHENTICATING, by both

!--- Two-way PPP CHAP authentication begins.

*Mar  3 17:00:46.723: As65 CHAP: O CHALLENGE id 7 Len 32 from "maui-rtr-10"
*Mar  3 17:00:46.847: As65 CHAP: I CHALLENGE id 7 Len 32 from "maui-rtr-11"
*Mar  3 17:00:46.851: As65 CHAP: O RESPONSE id 7 Len 32 from "maui-rtr-10"
*Mar  3 17:00:46.967: As65 CHAP: I SUCCESS id 7 Len 4
*Mar  3 17:00:46.971: As65 CHAP: I RESPONSE id 7 Len 32 from "maui-rtr-11"
*Mar  3 17:00:46.975: As65 CHAP: O SUCCESS id 7 Len 4

!--- Incoming and Outgoing CHAP authentication are successful.

*Mar  3 17:00:46.975: As65 PPP: Phase is UP
*Mar  3 17:00:46.979: As65 IPCP: O CONFREQ [Closed] id 8 Len 10

!--- IP Control Protocol (IPCP) negotiation begins.

*Mar  3 17:00:46.979: As65 IPCP:    Address 172.17.1.1 (0x0306AC110101)
*Mar  3 17:00:46.979: As65 CDPCP: O CONFREQ [Closed] id 7 Len 4
*Mar  3 17:00:47.087: As65 IPCP: I CONFREQ [REQsent] id 7 Len 10
*Mar  3 17:00:47.091: As65 IPCP:    Address 172.22.1.1 (0x0306AC160101)
*Mar  3 17:00:47.091: As65 IPCP: O CONFACK [REQsent] id 7 Len 10
*Mar  3 17:00:47.091: As65 IPCP:    Address 172.22.1.1 (0x0306AC160101)
*Mar  3 17:00:47.095: As65 CDPCP: I CONFREQ [REQsent] id 7 Len 4
*Mar  3 17:00:47.095: As65 CDPCP: O CONFACK [REQsent] id 7 Len 4
*Mar  3 17:00:47.099: As65 IPCP: I CONFACK [ACKsent] id 8 Len 10
*Mar  3 17:00:47.099: As65 IPCP:    Address 172.17.1.1 (0x0306AC110101)
*Mar  3 17:00:47.099: As65 IPCP: State is Open
*Mar  3 17:00:47.103: As65 DDR: dialer protocol up
*Mar  3 17:00:47.103: As65 IPCP: Remove route to 172.22.53.0
*Mar  3 17:00:47.103: As65 CDPCP: I CONFACK [ACKsent] id 7 Len 4
*Mar  3 17:00:47.107: As65 CDPCP: State is Open
*Mar  3 17:00:47.107: As65 IPCP: Install route to 172.22.1.1
*Mar  3 17:00:47.708: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async65,
 changed state to up

!--- Async 65 (AUX Port) is UP.

*Mar  3 17:01:14.572: As65 DDR: idle timeout

!--- Idle timeout expires. !--- The router will check to see if the primary link has come up.

*Mar  3 17:01:14.572: DDR: Dialer Watch: watch-group = 8
*Mar  3 17:01:14.572: DDR:        network 172.22.53.0/255.255.255.0 UP,

!--- A route for the watched network exists (due to the active backup link).

*Mar  3 17:01:14.572: DDR:        primary DOWN

!--- The primary network is down.

*Mar  3 17:02:05.191: As65 DDR: idle timeout

!--- Idle Timeout expires. !--- The router will check to see if the primary link has come up.

*Mar  3 17:02:05.191: DDR: Dialer Watch: watch-group = 8
*Mar  3 17:02:05.191: DDR:        network 172.22.53.0/255.255.255.0 UP,
*Mar  3 17:02:05.191: DDR:        primary DOWN

!--- The primary network is still down.

*Mar  3 17:02:50.982: %LINK-3-UPDOWN: Interface Serial0/1, 
changed state to up

!--- Primary link is reestablished.

*Mar  3 17:02:50.986: Se0/1 PPP: Treating connection as a dedicated line
*Mar  3 17:02:50.986: Se0/1 PPP: Phase is ESTABLISHING, Active Open
...
...
!--- Primary link PPP negotiation output omitted.

...
*Mar  3 17:02:51.039: Se0/1 IPCP: Install route to 192.168.10.1
*Mar  3 17:02:52.020: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1,
 changed state to up
*Mar  3 17:03:05.194: As65 DDR: idle timeout

!--- Next Idle Timeout expires. !--- The router will check to see if the primary link has come up.

*Mar  3 17:03:05.194: DDR: Dialer Watch: watch-group = 8
*Mar  3 17:03:05.194: DDR:        network 172.22.53.0/255.255.255.0 UP,
*Mar  3 17:03:05.194: DDR:        primary DOWN

!--- Dialer watch considers the primary network still down. !--- Even though the primary link is "up," the OSPF table has not yet been exchanged. !--- The primary link is not considered up until the route is installed.

*Mar  3 17:03:35.195: As65 DDR: idle timeout

!--- Next idle timeout (30 seconds) expires. !--- The router will check to see if the primary link has come up.

*Mar  3 17:03:35.195: DDR: Dialer Watch: watch-group = 8
*Mar  3 17:03:35.195: DDR:        network 172.22.53.0/255.255.255.0 UP,

!--- A route for the watched network exists. 

*Mar  3 17:03:35.195: DDR:        primary UP

!--- The primary network is up. !--- Dialer watch will initiate a disconnect of the backup link.

*Mar  3 17:03:35.195: As65 DDR: starting watch disable timer

!--- Delays disconnecting the backup interface after the primary !--- interface recovers. This timer is 15 seconds as configured !--- with the command dialer watch-disable 15.

*Mar  3 17:03:50.196: As65 DDR: watch disable timeout

!--- The 15 second disconnect delay expires. !--- The link will be immediately brought down.

*Mar  3 17:03:50.196: As65 DDR: disconnecting call

!--- Call on Async 65 (AUX Port) is disconnected.

*Mar  3 17:03:50.196: TTY65: Async Int reset: Dropping DTR
...
...
!--- Link tear-down messages omitted here.

...
*Mar  3 17:03:57.203: %LINK-3-UPDOWN: Interface Async65, changed state to down

配置用 Dialer Watch的 AUX 端口间异步备份

下载选项

非歧视性语言

关于此翻译

目录

简介

先决条件

要求

使用的组件

规则

背景理论

配置

网络图

配置

验证

show 输出示例

故障排除

故障排除命令

调试输出示例

相关信息

修订历史记录

此文档是否有帮助?

联系我们

本文档适用于以下产品