eNSP综合实验（PPP认证、VPN配置、RIP协议、NAT）

题目如上

第一步:配置IP地址

ip分配如下图所示

开始配置IP(PC省略）

R1：

[R1]undo	
[R1]undo in	
[R1]undo info-centere	
[R1]undo info-center e	
[R1]undo info-center enable 
Info: Information center is disabled.
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip ad	
[R1-GigabitEthernet0/0/0]ip address 192.168.1.254 24
[R1-GigabitEthernet0/0/0]q
[R1]int s4/0/0
[R1-Serial4/0/0]ip ad	
[R1-Serial4/0/0]ip address 15.1.1.1 24
[R1-Serial4/0/0]q

R2：

[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip ad	
[R2-GigabitEthernet0/0/0]ip address 192.168.2.2 24
[R2-GigabitEthernet0/0/0]q
[R2]undo in	
[R2]undo info-center e	
[R2]undo info-center enable 
Info: Information center is disabled.
[R2]int s4/0/0
[R2-Serial4/0/0]ip ad	
[R2-Serial4/0/0]ip address 25.1.1.2 24
[R2-Serial4/0/0]q

R3：

[R3]undo in	
[R3]undo info-center e	
[R3]undo info-center enable 
Info: Information center is disabled.
[R3]int g 0/0/0
[R3-GigabitEthernet0/0/0]ip ad	
[R3-GigabitEthernet0/0/0]ip address 192.168.3.254 24
[R3-GigabitEthernet0/0/0]q
[R3]int s 4/0/0
[R3-Serial4/0/0]ip d	
[R3-Serial4/0/0]ip ad	
[R3-Serial4/0/0]ip address 35.1.1.3 24
[R3-Serial4/0/0]q

R4：

[R4]undo in	
[R4]undo info-center e	
[R4]undo info-center enable 
Info: Information center is disabled.
[R4]int g 0/0/0
[R4-GigabitEthernet0/0/0]ip ad	
[R4-GigabitEthernet0/0/0]ip address 45.1.1.4 24
[R4-GigabitEthernet0/0/0]q
[R4]int g0/0/1
[R4-GigabitEthernet0/0/1]ip ad	
[R4-GigabitEthernet0/0/1]ip address 192.168.4.254 24
[R4-GigabitEthernet0/0/1]q
[R4]

ISP：

[ISP]int s4/0/1
[ISP-Serial4/0/1]ip ad	
[ISP-Serial4/0/1]ip address 15.1.1.254 24
[ISP-Serial4/0/1]
Mar 29 2024 16:45:23-08:00 ISP %%01IFNET/4/LINK_STATE(l)[0]:The line protocol PP
P IPCP on the interface Serial4/0/1 has entered the UP state. 
[ISP-Serial4/0/1]q
[ISP]und	
[ISP]undo in	
[ISP]undo info-center e	
[ISP]undo info-center enable 
Info: Information center is disabled.
[ISP]int s 2/0/1
[ISP-Serial2/0/1]ip ad	
[ISP-Serial2/0/1]ip address 25.1.1.254 24
[ISP-Serial2/0/1]q
[ISP]int s 3/0/1
[ISP-Serial3/0/1]ip ad	
[ISP-Serial3/0/1]ip address 35.1.1.254 24
[ISP-Serial3/0/1]q
[ISP]int g0/0/0
[ISP-GigabitEthernet0/0/0]ip ad	
[ISP-GigabitEthernet0/0/0]ip address 45.1.1.254 24
[ISP-GigabitEthernet0/0/0]q
[ISP]

第二步：使全部公网通（使用缺省）

R1：

[R1]ip rou	
[R1]ip route
[R1]ip route-static 0.0.0.0 0 15.1.1.254
[R1]

R2：

[R2]ip rou	
[R2]ip route
[R2]ip route-static 0.0.0.0 0 25.1.1.254 
[R2]

R3：

[R3]ip rou	
[R3]ip route
[R3]ip route-static 0.0.0.0 0 35.1.1.254
[R3]

R4：

[R4]ip rou	
[R4]ip route
[R4]ip route-static 0.0.0.0 0 45.1.1.254
[R4]

第三步：做R1与R5之间的PAP认证，R5为主认证方

R5：

[ISP]aaa
[ISP-aaa]lo	
[ISP-aaa]local-user wangdaye pas	
[ISP-aaa]local-user wangdaye password c	
[ISP-aaa]local-user wangdaye password cipher wdy12345
Info: Add a new user.
[ISP-aaa]lo	
[ISP-aaa]local-user wangdaye s	
[ISP-aaa]local-user wangdaye service-type ppp
[ISP-aaa]q
[ISP]int s 4/0/1
[ISP-Serial4/0/1]ppp a	
[ISP-Serial4/0/1]ppp authentication-mode pap
[ISP-Serial4/0/1]q
[ISP]

R1:

[R1]int s4/0/0
[R1-Serial4/0/0]ppp pap local-user wangdaye password cipher wdy12345

验证是否成功

[R1-Serial3/0/0]shutdown 
Mar 29 2024 18:10:20-08:00 R1 %%01PPP/4/PHYSICALDOWN(l)[2]:On the interface Seri
al3/0/0, PPP link was closed because the status of the physical layer was Down. 

[R1-Serial3/0/0]
[R1-Serial3/0/0]
Mar 29 2024 18:10:20-08:00 R1 %%01IFNET/4/LINK_STATE(l)[3]:The line protocol PPP
 on the interface Serial3/0/0 has entered the DOWN state. 
[R1-Serial3/0/0]
Mar 29 2024 18:10:20-08:00 R1 %%01IFNET/4/LINK_STATE(l)[4]:The line protocol PPP
 IPCP on the interface Serial3/0/0 has entered the DOWN state. 
[R1-Serial3/0/0]
Mar 29 2024 18:10:20-08:00 R1 %%01IFPDT/4/IF_STATE(l)[5]:Interface Serial3/0/0 h
as turned into DOWN state.
[R1-Serial3/0/0]
Mar 29 2024 18:10:20-08:00 R1 %%01RM/4/IPV4_DEFT_RT_CHG(l)[6]:IPV4 default Route
 is changed. (ChangeType=Delete, InstanceId=0, Protocol=Static, ExitIf=Unknown, 
Nexthop=15.1.1.254, Neighbour=0.0.0.0, Preference=1006632960, Label=NULL, Metric
=0) 
[R1-Serial3/0/0]undo sh	
[R1-Serial3/0/0]undo shutdown 
[R1-Serial3/0/0]
Mar 29 2024 18:10:27-08:00 R1 %%01IFPDT/4/IF_STATE(l)[7]:Interface Serial3/0/0 h
as turned into UP state.
[R1-Serial3/0/0]
Mar 29 2024 18:10:28-08:00 R1 %%01IFNET/4/LINK_STATE(l)[8]:The line protocol PPP
 on the interface Serial3/0/0 has entered the UP state. 
[R1-Serial3/0/0]
Mar 29 2024 18:10:28-08:00 R1 %%01IFNET/4/LINK_STATE(l)[9]:The line protocol PPP
 IPCP on the interface Serial3/0/0 has entered the UP state. 
[R1-Serial3/0/0]

第四步：做R2与R5之间的chap认证，R5为主认证方

R5：

[ISP(R5)]aaa
[ISP(R5)-aaa]lo	
[ISP(R5)-aaa]local-user zhangdaye pa	
[ISP(R5)-aaa]local-user zhangdaye password c	
[ISP(R5)-aaa]local-user zhangdaye password cipher zdy12345
Info: Add a new user.
[ISP(R5)-aaa]lo	
[ISP(R5)-aaa]local-user zhangdaye s	
[ISP(R5)-aaa]local-user zhangdaye service-type ppp
[ISP(R5)-aaa]q
[ISP(R5)]int s 2/0/1
[ISP(R5)-Serial2/0/1]ppp a	
[ISP(R5)-Serial2/0/1]ppp authentication-mode ch	
[ISP(R5)-Serial2/0/1]ppp authentication-mode chap 
[ISP(R5)-Serial2/0/1]q

R2：

[R2]int s 3/0/0
[R2-Serial3/0/0]ppp cha	
[R2-Serial3/0/0]ppp chap l	
[R2-Serial3/0/0]ppp chap u	
[R2-Serial3/0/0]ppp chap user zhangdaye
[R2-Serial3/0/0]ppp chap pas	
[R2-Serial3/0/0]ppp chap password c	
[R2-Serial3/0/0]ppp chap password cipher zdy12345

验证是否成功：

[R2-Serial3/0/0]shutdown 
Mar 29 2024 18:14:19-08:00 R2 %%01PPP/4/PHYSICALDOWN(l)[2]:On the interface Seri
al3/0/0, PPP link was closed because the status of the physical layer was Down. 

[R2-Serial3/0/0]
[R2-Serial3/0/0]
Mar 29 2024 18:14:19-08:00 R2 %%01IFNET/4/LINK_STATE(l)[3]:The line protocol PPP
 on the interface Serial3/0/0 has entered the DOWN state. 
[R2-Serial3/0/0]
Mar 29 2024 18:14:19-08:00 R2 %%01IFNET/4/LINK_STATE(l)[4]:The line protocol PPP
 IPCP on the interface Serial3/0/0 has entered the DOWN state. 
[R2-Serial3/0/0]
Mar 29 2024 18:14:19-08:00 R2 %%01IFPDT/4/IF_STATE(l)[5]:Interface Serial3/0/0 h
as turned into DOWN state.
[R2-Serial3/0/0]
Mar 29 2024 18:14:19-08:00 R2 %%01RM/4/IPV4_DEFT_RT_CHG(l)[6]:IPV4 default Route
 is changed. (ChangeType=Delete, InstanceId=0, Protocol=Static, ExitIf=Unknown, 
Nexthop=25.1.1.254, Neighbour=0.0.0.0, Preference=1006632960, Label=NULL, Metric
=0) 
[R2-Serial3/0/0]undo sh	
[R2-Serial3/0/0]undo shutdown 
[R2-Serial3/0/0]
Mar 29 2024 18:14:24-08:00 R2 %%01IFPDT/4/IF_STATE(l)[7]:Interface Serial3/0/0 h
as turned into UP state.
[R2-Serial3/0/0]
Mar 29 2024 18:14:24-08:00 R2 %%01IFNET/4/LINK_STATE(l)[8]:The line protocol PPP
 on the interface Serial3/0/0 has entered the UP state. 
[R2-Serial3/0/0]
Mar 29 2024 18:14:24-08:00 R2 %%01IFNET/4/LINK_STATE(l)[9]:The line protocol PPP
 IPCP on the interface Serial3/0/0 has entered the UP state. 
[R2-Serial3/0/0]

第五步：做R3与R5之间的HDLC封装

R3：

[R3]int s 3/0/0
[R3-Serial3/0/0]lin	
[R3-Serial3/0/0]link-protocol hd	
[R3-Serial3/0/0]link-protocol hdlc 
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
Mar 29 2024 18:15:54-08:00 R3 %%01IFNET/4/CHANGE_ENCAP(l)[0]:The user performed 
the configuration that will change the encapsulation protocol of the link and th
en selected Y. 
[R3-Serial3/0/0]
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01PPP/4/PHYSICALDOWN(l)[1]:On the interface Seri
al3/0/0, PPP link was closed because the status of the physical layer was Down. 
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01IFNET/4/LINK_STATE(l)[2]:The line protocol PPP
 on the interface Serial3/0/0 has entered the DOWN state. 
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01IFNET/4/LINK_STATE(l)[3]:The line protocol PPP
 IPCP on the interface Serial3/0/0 has entered the DOWN state. 
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01IFPDT/4/IF_STATE(l)[4]:Interface Serial3/0/0 h
as turned into DOWN state.
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01RM/4/IPV4_DEFT_RT_CHG(l)[5]:IPV4 default Route
 is changed. (ChangeType=Delete, InstanceId=0, Protocol=Static, ExitIf=Unknown, 
Nexthop=35.1.1.254, Neighbour=0.0.0.0, Preference=1006632960, Label=NULL, Metric
=0) 
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01IFPDT/4/IF_STATE(l)[6]:Interface Serial3/0/0 h
as turned into UP state.
[R3-Serial3/0/0]
Mar 29 2024 18:15:54-08:00 R3 %%01IFNET/4/LINK_STATE(l)[7]:The line protocol IP 
on the interface Serial3/0/0 has entered the UP state. 
[R3-Serial3/0/0]

R5：

[ISP(R5)]int s 3/0/1
[ISP(R5)-Serial3/0/1]lin	
[ISP(R5)-Serial3/0/1]link-protocol hd	
[ISP(R5)-Serial3/0/1]link-protocol hdlc 
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
Mar 29 2024 18:16:14-08:00 ISP(R5) %%01IFNET/4/CHANGE_ENCAP(l)[16]:The user perf
ormed the configuration that will change the encapsulation protocol of the link 
and then selected Y. 
[ISP(R5)-Serial3/0/1]
[ISP(R5)-Serial3/0/1]
Mar 29 2024 18:16:14-08:00 ISP(R5) %%01IFPDT/4/IF_STATE(l)[17]:Interface Serial3
/0/1 has turned into DOWN state.
[ISP(R5)-Serial3/0/1]
Mar 29 2024 18:16:15-08:00 ISP(R5) %%01IFPDT/4/IF_STATE(l)[18]:Interface Serial3
/0/1 has turned into UP state.
[ISP(R5)-Serial3/0/1]
Mar 29 2024 18:16:15-08:00 ISP(R5) %%01IFNET/4/LINK_STATE(l)[19]:The line protoc
ol IP on the interface Serial3/0/1 has entered the UP state. 
[ISP(R5)-Serial3/0/1]

验证是否成功：

[ISP(R5)-Serial3/0/1]dis th
[V200R003C00]
#
interface Serial3/0/1
 link-protocol hdlc
 ip address 35.1.1.254 255.255.255.0 
#
return
[ISP(R5)-Serial3/0/1]

[R3-Serial3/0/0]dis th
[V200R003C00]
#
interface Serial3/0/0
 link-protocol hdlc
 ip address 35.1.1.3 255.255.255.0 
#
return
[R3-Serial3/0/0]

第六步：R1到R4的GRE

R1：

[R1]int t	
[R1]int Tunnel 0/0/0
[R1-Tunnel0/0/0]ip ad	
[R1-Tunnel0/0/0]ip address 10.1.1.1 24
[R1-Tunnel0/0/0]t	
[R1-Tunnel0/0/0]tcp
[R1-Tunnel0/0/0]tun	
[R1-Tunnel0/0/0]tunnel-protocol g	
[R1-Tunnel0/0/0]tunnel-protocol gre 
[R1-Tunnel0/0/0]sou	
[R1-Tunnel0/0/0]source 15.1.1.1
[R1-Tunnel0/0/0]des	
[R1-Tunnel0/0/0]description
[R1-Tunnel0/0/0]destination 45.1.1.4
Mar 29 2024 18:25:18-08:00 R1 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface Tunnel0/0/0 has entered the UP state.

R4：

[R4]int t	
[R4]int Tunnel 0/0/0
[R4-Tunnel0/0/0]ip ad	
[R4-Tunnel0/0/0]ip address 10.1.1.2 24
[R4-Tunnel0/0/0]tun	
[R4-Tunnel0/0/0]tunnel-protocol gr	
[R4-Tunnel0/0/0]tunnel-protocol gre 
[R4-Tunnel0/0/0]	
[R4-Tunnel0/0/0]s	
[R4-Tunnel0/0/0]set
[R4-Tunnel0/0/0]shutdown
[R4-Tunnel0/0/0]source 45.1.1.4
[R4-Tunnel0/0/0]des	
[R4-Tunnel0/0/0]description
[R4-Tunnel0/0/0]destination 15.1.1.1
Mar 29 2024 18:26:40-08:00 R4 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface Tunnel0/0/0 has entered the UP state. 
[R4-Tunnel0/0/0]

检查是否成功：

[R4-Tunnel0/0/0]dis th
[V200R003C00]
#
interface Tunnel0/0/0
 ip address 10.1.1.2 255.255.255.0 
 tunnel-protocol gre
 source 45.1.1.4
 destination 15.1.1.1
#
return
[R4-Tunnel0/0/0]

[R1-Tunnel0/0/0]dis th
[V200R003C00]
#
interface Tunnel0/0/0
 ip address 10.1.1.1 255.255.255.0 
 tunnel-protocol gre
 source 15.1.1.1
 destination 45.1.1.4
#
return
[R1-Tunnel0/0/0]

第七步：R1、R2、R3的MGRE环境

先配置MGRE：

R1:

[R1]int Tunnel 0/0/1
[R1-Tunnel0/0/1]ip ad	
[R1-Tunnel0/0/1]ip address 10.1.2.1 24
[R1-Tunnel0/0/1]tun	
[R1-Tunnel0/0/1]tunnel-protocol g	
[R1-Tunnel0/0/1]tunnel-protocol gre p	
[R1-Tunnel0/0/1]tunnel-protocol gre p2mp 
[R1-Tunnel0/0/1]s	
[R1-Tunnel0/0/1]seou	
[R1-Tunnel0/0/1]sou	
[R1-Tunnel0/0/1]source 15.1.1.1
Mar 29 2024 18:30:34-08:00 R1 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP 
on the interface Tunnel0/0/1 has entered the UP state. 
[R1-Tunnel0/0/1]

R2:

[R2]int t	
[R2]int Tunnel 0/0/1
[R2-Tunnel0/0/1]ip ad	
[R2-Tunnel0/0/1]ip address 10.1.2.2 24
[R2-Tunnel0/0/1]tun	
[R2-Tunnel0/0/1]tunnel-protocol gre	
[R2-Tunnel0/0/1]tunnel-protocol gre p	
[R2-Tunnel0/0/1]tunnel-protocol gre p2mp 
[R2-Tunnel0/0/1]sour	
[R2-Tunnel0/0/1]source 24.1.1.2
[R2-Tunnel0/0/1]sour	
[R2-Tunnel0/0/1]source 25.1.1.2
Mar 29 2024 18:34:31-08:00 R2 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface Tunnel0/0/1 has entered the UP state. 
[R2-Tunnel0/0/1]
[R2-Tunnel0/0/1]

R3:

[R3]int t	
[R3]int Tunnel 0/0/1
[R3-Tunnel0/0/1]ip 	
[R3-Tunnel0/0/1]ip ad	
[R3-Tunnel0/0/1]ip address 10.1.2.3 24
[R3-Tunnel0/0/1]tun	
[R3-Tunnel0/0/1]tunnel-protocol g	
[R3-Tunnel0/0/1]tunnel-protocol gre p	
[R3-Tunnel0/0/1]tunnel-protocol gre p2mp 
[R3-Tunnel0/0/1]sour	
[R3-Tunnel0/0/1]source 35.1.1.3
Mar 29 2024 18:34:16-08:00 R3 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP 
on the interface Tunnel0/0/1 has entered the UP state.

在中心站点配置NHRP

R1:

[R1]int t	
[R1]int Tunnel 0/0/1
[R1-Tunnel0/0/1]nhr	
[R1-Tunnel0/0/1]nhrp ne	
[R1-Tunnel0/0/1]nhrp network-id 100
[R1-Tunnel0/0/1]

分支站点：(将分支站点的源地址改为接口）

R2:

[R2-Tunnel0/0/1]sour	
[R2-Tunnel0/0/1]source s3/0/0
[R2-Tunnel0/0/1]nh	
[R2-Tunnel0/0/1]nhrp n	
[R2-Tunnel0/0/1]nhrp network-id 100
[R2-Tunnel0/0/1]n	
[R2-Tunnel0/0/1]nah	
[R2-Tunnel0/0/1]nh	
[R2-Tunnel0/0/1]nhrp e	
[R2-Tunnel0/0/1]nhrp entry 10.1.2.1 15.1.1.1 re	
[R2-Tunnel0/0/1]nhrp entry 10.1.2.1 15.1.1.1 register 
[R2-Tunnel0/0/1]

R3：

[R3-Tunnel0/0/1]sour	
[R3-Tunnel0/0/1]source s 3/0/0
[R3-Tunnel0/0/1]nh	
[R3-Tunnel0/0/1]nhrp ne	
[R3-Tunnel0/0/1]nhrp network-id 100
[R3-Tunnel0/0/1]ne	
[R3-Tunnel0/0/1]ng	
[R3-Tunnel0/0/1]nh	
[R3-Tunnel0/0/1]nhrp en	
[R3-Tunnel0/0/1]nhrp entry 10.1.2.1 15.1.1.1 r	
[R3-Tunnel0/0/1]nhrp entry 10.1.2.1 15.1.1.1 register 
[R3-Tunnel0/0/1]

配置RIP协议（关闭水平分割，开启伪广播）

R1：

[R1]rip 1
[R1-rip-1]v	
[R1-rip-1]v 2
[R1-rip-1]net	
[R1-rip-1]undo s	
[R1-rip-1]undo silent-interface
[R1-rip-1]undo summary
[R1-rip-1]net	
[R1-rip-1]network 192.168.1.0
[R1-rip-1]net	
[R1-rip-1]network 10.0.0.0
[R1-rip-1]q
[R1]int t	
[R1]int Tunnel 0/0/1
[R1-Tunnel0/0/1]undo rip s	
[R1-Tunnel0/0/1]undo rip split-horizon
[R1-Tunnel0/0/1]nhr	
[R1-Tunnel0/0/1]nhrp entry multicast d	
[R1-Tunnel0/0/1]nhrp entry multicast dynamic 
[R1-Tunnel0/0/1]

R2:

[R2]int t 0/0/1
[R2-Tunnel0/0/1]undo rip	
[R2-Tunnel0/0/1]undo rip s	
[R2-Tunnel0/0/1]undo rip summary-address
[R2-Tunnel0/0/1]undo rip split-horizon
[R2-Tunnel0/0/1]

R3:

[R3]int t 0/0/1
[R3-Tunnel0/0/1]un do	
[R3-Tunnel0/0/1]undo rip s	
[R3-Tunnel0/0/1]undo rip split-horizon
[R3-Tunnel0/0/1]undo rip summary-address
[R3-Tunnel0/0/1]undo rip split-horizon
[R3-Tunnel0/0/1]q

第八步：设置NAT使PC可以访问R5环回(使用EZIP）

R1：

[R1]acl 2000
[R1-acl-basic-2000]reu	
[R1-acl-basic-2000]ru	
[R1-acl-basic-2000]rule 
[R1-acl-basic-2000]rule 
[R1-acl-basic-2000]rule p	
[R1-acl-basic-2000]rule permit  s	
[R1-acl-basic-2000]rule permit  source  192.168.1.0 0.0.0.255
[R1-acl-basic-2000]q
[R1]int s 3/0/0
[R1-Serial3/0/0]nat out	
[R1-Serial3/0/0]nat outbound 2000
[R1-Serial3/0/0]q
[R1]

R2：

[R2]acl	
[R2]acl 2000
[R2-acl-basic-2000]ru	
[R2-acl-basic-2000]rule p	
[R2-acl-basic-2000]rule permit s	
[R2-acl-basic-2000]rule permit source 192.168.2.0 0.0.0.255
[R2-acl-basic-2000]q
[R2]int s 3/0/0
[R2-Serial3/0/0]nat out	
[R2-Serial3/0/0]nat outbound 2000
[R2-Serial3/0/0]q
[R2]

R3：

<R3>sy
Enter system view, return user view with Ctrl+Z.
[R3]acl 2000
[R3-acl-basic-2000]ru	
[R3-acl-basic-2000]rule p	
[R3-acl-basic-2000]rule permit s	
[R3-acl-basic-2000]rule permit source 192.168.3.0 0.0.0.255
[R3-acl-basic-2000]q
[R3]int s 3/0/0
[R3-Serial3/0/0]nat out	
[R3-Serial3/0/0]nat outbound 2000
[R3-Serial3/0/0]q
[R3]

R4：

<R4>sy
Enter system view, return user view with Ctrl+Z.
[R4]acl	
[R4]acl 2000
[R4-acl-basic-2000]ru	
[R4-acl-basic-2000]rule p	
[R4-acl-basic-2000]rule permit s	
[R4-acl-basic-2000]rule permit source 192.168.4.0 0.0.0.255
[R4-acl-basic-2000]q
[R4]nat out	
[R4]int s 3/0/0
[R4-Serial3/0/0]nat ou	
[R4-Serial3/0/0]nat outbound 200
                             ^
Error: Wrong parameter found at '^' position.
[R4-Serial3/0/0]q
[R4]int s 3/0/0
[R4-Serial3/0/0]nat outbound 2000
[R4-Serial3/0/0]q
[R4]

验证是否通