📄 route学习.txt
字号:
!
interface bri 0
ip address 192.200.10.1 255.255.255.0
encapsulation ppp
dialer map ip 192.200.10.2 name router2 572
dialer load-threshold 80
ppp multilink
dialer-group 1
ppp authentication chap
!
dialer-list 1 protocol ip permit
!
Router2:
hostname router2
user router1 password cisco
!
isdn switch-type basic-net3
!
interface bri 0
ip address 192.200.10.2 255.255.255.0
encapsulation ppp
dialer map ip 192.200.10.1 name router1 571
dialer load-threshold 80
ppp multilink
dialer-group 1
ppp authentication chap
!
dialer-list 1 protocol ip permit
!
Cisco路由器同时支持回拨功能,我们将路由器Router1作为Callback Server,Router2作为Callback Client。
与回拨相关命令:
任务
命令
映射协议地址和电话号码,并在接口上使用在全局模式下定义的PPP回拨的映射类别。
dialer map protocol address name hostname class classname dial-string
设置接口支持PPP回拨
ppp callback accept
在全局模式下为PPP回拨设置映射类别
map-class dialer classname
通过查找注册在dialer map里的主机名来决定回拨.
dialer callback-server [username]
设置接口要求PPP回拨
ppp callback request
设置如下:
Router1:
hostname router1
user router2 password cisco
!
isdn switch-type basic-net3
!
interface bri 0
ip address 192.200.10.1 255.255.255.0
encapsulation ppp
dialer map ip 192.200.10.2 name router2 class s3 572
dialer load-threshold 80
ppp callback accept
ppp multilink
dialer-group 1
ppp authentication chap
!
map-class dialer s3
dialer callback-server username
dialer-list 1 protocol ip permit
!
Router2:
hostname router2
user router1 password cisco
!
isdn switch-type basic-net3
!
interface bri 0
ip address 192.200.10.2 255.255.255.0
encapsulation ppp
dialer map ip 192.200.10.1 name router1 571
dialer load-threshold 80
ppp callback request
ppp multilink
dialer-group 1
ppp authentication chap
!
dialer-list 1 protocol ip permit
!
相关调试命令:
debug dialer
debug isdn event
debug isdn q921
debug isdn q931
debug ppp authentication
debug ppp error
debug ppp negotiation
debug ppp packet
show dialer
show isdn status
举例:执行debug dialer命令观察router2呼叫router1,router1回拨router2的过程.
router1#debug dialer
router2#ping 192.200.10.1
router1#
00:03:50: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
00:03:50: BRI0:1:PPP callback Callback server starting to router2 572
00:03:50: BRI0:1: disconnecting call
00:03:50: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
00:03:50: BRI0:1: disconnecting call
00:03:50: BRI0:1: disconnecting call
00:03:51: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up
00:03:52: callback to router2 already started
00:03:52: BRI0:2: disconnecting call
00:03:52: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
00:03:52: BRI0:2: disconnecting call
00:03:52: BRI0:2: disconnecting call
00:04:05: : Callback timer expired
00:04:05: BRI0:beginning callback to router2 572
00:04:05: BRI0: Attempting to dial 572
00:04:05: Freeing callback to router2 572
00:04:05: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
00:04:05: BRI0:1: No callback negotiated
00:04:05: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
00:04:05: dialer Protocol up for Vi1
00:04:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state
to up
00:04:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, chang
ed state to up
00:04:11: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 572
#router1
4. ISDN访问首都在线263网实例:
本地局部网地址为10.0.0.0/24,属于保留地址,通过NAT地址翻译功能,局域网用户可以通过ISDN上263网访问Internet。263的ISDN电话号码为2633,用户为263,口令为263,所涉及的命令如下表:
任务
命令
指定接口通过PPP/IPCP地址协商获得IP地址
ip address negotiated
指定内部和外部端口
ip nat {inside | outside}
使用ppp/pap作认证
ppp authentication pap callin
指定接口属于拨号组1
dialer-group 1
定义拨号组1允许所有IP协议
dialer-list 1 protocol ip permit
设定拨号,号码为2633
dialer string 2633
设定登录263的用户名和口令
ppp pap sent-username 263 password 263
设定默认路由
ip route 0.0.0.0 0.0.0.0 bri 0
设定符合访问列表2的所有源地址被翻译为bri 0所拥有的地址
ip nat inside source list 2 interface bri 0 overload
设定访问列表2,允许所有协议
access-list 2 permit any
具体配置如下:
hostname Cisco2503
!
isdn switch-type basic-net3
!
ip subnet-zero
no ip domain-lookup
ip routing
!
interface Ethernet 0
ip address 10.0.0.1 255.255.255.0
ip nat inside
no shutdown
!
interface Serial 0
shutdown
no description
no ip address
!
interface Serial 1
shutdown
no description
no ip address
!
interface bri 0
ip address negotiated
ip nat outside
encapsulation ppp
ppp authentication pap callin
ppp multilink
dialer-group 1
dialer hold-queue 10
dialer string 2633
dialer idle-timeout 120
ppp pap sent-username 263 password 263
no cdp enable
no ip split-horizon
no shutdown
!
ip classless
!
! Static Routes
!
ip route 0.0.0.0 0.0.0.0 bri 0
!
! Access Control List 2
!
access-list 2 permit any
!
dialer-list 1 protocol ip permit
!
! Dynamic NAT
!
ip nat inside source list 2 interface bri 0 overload
snmp-server community public ro
!
line console 0
exec-timeout 0 0
!
line vty 0 4
!
end
5. Cisco765M通过ISDN拨号上263
由于Cisco765的设置命令与我们常用的Cisco路由器的命令不同,所以以下列举了通过Cisco765上263访问Internet的具体命令行设置步骤。
>set system c765
c765> set multidestination on
c765> set switch net3
c765> set ppp multilink on
c765> cd lan
c765:LAN> set ip routing on
c765:LAN> set ip address 10.0.0.1
c765:LAN> set ip netmask 255.0.0.0
c765:LAN> set briding off
c765:LAN>cd
c765> set user remotenet
New user remotenet being created
c765:remotenet> set ip routing on
c765:remotenet> set bridging off
c765:remotenet> set ip framing none
c765:remotenet> set ppp clientname 263
c765:remotenet> set ppp password client
Enter new Password: 263
Re-Type new Password: 263
c765:remotenet> set ppp authentication out none
c765:remotenet> set ip address 0.0.0.0
c765:remotenet> set ip netmask 0.0.0.0
c765:remotenet> set ppp address negotiation local on
c765:remotenet> set ip pat on
c765:remotenet> set ip route destination 0.0.0.0/0 gateway 0.0.0.0
c765:remotenet> set number 2633
c765:remotenet> set active
命令描述如下:
任务
命令
设置路由器系统名称
set system c765
允许路由器呼叫多个目的地
set multidestination on
设置ISDN交换机类型为NET3
set switch net3
允许点到点间多条通道连接实现负载均衡
set ppp multilink on
关掉桥接
set briding off
建立用户预制文件用于设置拨号连接参数- 可以设置多个用户预制文件用于相同的物理端口对应于不同的连接。
set user remotenet
使用PPP/IPCP
set ip framing none
设置上网用户帐号
set ppp clientname 263
设置上网口令
set ppp password client
Enter new Password: 263
Re-Type new Password: 263
不用PPP/CHAP或PAP做认证
set ppp authentication out none
允许地址磋商
set ppp address negotiation local on
设置地址翻译
set ip pat on
设置默认路由
set ip route destination 0.0.0.0/0 gateway 0.0.0.0
设置ISP的电话号码
set number 2633
激活用户预制文件
set active
CISCO路由器配置手册-第二章(广域网协议设置PSTN)
六、PSTN
电话网络(PSTN)是目前普及程度最高、成本最低的公用通讯网络,它在网络互连中也有广泛的应用。电话网络的应用一般可分为两种类型,一种是同等级别机构之间以按需拨号(DDR)的方式实现互连,一种是ISP为拨号上网为用户提供的远程访问服务的功能。
1. 远程访问
1.1.Access Server基本设置:
选用Cisco2511作为访问服务器,采用IP地址池动态分配地址.远程工作站使用WIN95拨号网络实现连接。
全局设置:
任务
命令
设置用户名和密码
username username password password
设置用户的IP地址池
ip local pool {default | pool-name low-ip-address [high-ip-address]}
指定地址池的工作方式
ip address-pool [dhcp-proxy-client | local]
基本接口设置命令:
任务
命令
设置封装形式为PPP
encapsulation ppp
启动异步口的路由功能
async default routing
设置异步口的PPP工作方式
async mode {dedicated | interactive}
设置用户的IP地址
peer default ip address {ip-address | dhcp | pool [pool-name]}
设置IP地址与Ethernet0相同
ip unnumbered ethernet0
line拨号线设置:
任务
命令
设置modem的工作方式
modem {inout|dialin}
自动配置modem类型
modem autoconfig discovery
设置拨号线的通讯速率
speed speed
设置通讯线路的流控方式
flowcontrol {none | software [lock] [in | out] | hardware [in | out]}
连通后自动执行命令
autocommand command
访问服务器设置如下:
Router:
hostname Router
enable secret 5 $1$EFqU$tYLJLrynNUKzE4bx6fmH//
!
interface Ethernet0
ip address 10.111.4.20 255.255.255.0
!
interface Async1
ip unnumbered Ethernet0
encapsulation ppp
keepalive 10
async mode interactive
peer default ip address pool Cisco2511-Group-142
!
ip local pool Cisco2511-Group-142 10.111.4.21 10.111.4.36
!
line con 0
exec-timeout 0 0
password cisco
!
line 1 16
modem InOut
modem autoconfigure discovery
flowcontrol hardware
!
line aux 0
transport input all
line vty 0 4
password cisco
!
end
相关调试命令:
show interface
show line
1.2. Access Server通过Tacacs服务器实现安全认证:
使用一台WINDOWS NT服务器作为Tacacs服务器,地址为10.111.4.2,运行Cisco2511随机带的Easy ACS 1.0软件实现用户认证功能.
相关设置:
任务
命令
激活AAA访问控制
aaa new-model
用户登录时默认起用Tacacs+做AAA认证
aaa authentication login default tacacs+
列表名为no_tacacs使用ENABLE口令做认证
aaa authentication login no_tacacs enable
在运行PPP的串行线上采用Tacacs+做认证
aaa authentication ppp default tacacs+
由TACACS+服务器授权运行EXEC
aaa authorization exec tacacs+
由TACACS+服务器授权与网络相关的服务请求。
aaa authorization network tacacs+
为EXEC会话运行记帐.进程开始和结束时发通告给TACACS+服务器。
aaa accounting exec start-stop tacacs+
为与网络相关的服务需求运行记帐包括SLIP,PPP,PPP NCPs,ARAP等.在进程开始和结束时发通告给TACACS+服务器。
aaa accounting network start-stop tacacs+
指定Tacacs服务器地址
tacacs-server host 10.111.4.2
在Tacacs+服务器和访问服务器设定共享的关键字,访问服务器和Tacacs+服务器使用这个关键字去加密口令和响应信息。这里使用tac作为关键字。
tacacs-server key tac
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