1、R5为ISP，只能进行ip地址配置;其所有接口配置为公有ip地址 2、R1与R5间使用PPP的PAP认证，R5为主认证方;R2与R5间使用PPP的chap认证，R5为主认证方;R3与R5间使用HDLC封装 3、R1/2/3构建一个MGRE环境，R1为中心站点;R1/4间为点到点GRE 4、整个私有网络基于RIP全网可达 5、所有路由器基于环回私有地址为源ip时，可以正常访问R5环回
1、网络部署——拓扑的搭建 2、底层部署——IP地址规划配置保证全网底层都有IP R1-R4私网网段：192.168.1.0/24——192.168.4.0/24 公网各路由器间15.1.1.0/24；25.1.1.1/24；35.1.1.1/24；45.1.1.1/24 tunnel口地址：10.1.1.1 /24；——10.1.1.3/24；10.2.2.1/24-10.2.2.2/24 链路接口认证也是底层部署的一部分 R1和R5之间的PPP认证，R5为主认证方：
[R5]aaa //主认证方——服务端 [R5-aaa]local-user huawei password cipher huawei123 Info: Add a new user. [R5-aaa]local-user huawei service-type ppp [R5-aaa]int s4/0/0 //连接客户端接口 [R5-Serial4/0/0]link-protocol ppp [R5-Serial4/0/0]ppp authentication-mode pap [R5-Serial4/0/0]ip address 15.1.1.2 24 [R5-Serial4/0/0]q [R1]int s4/0/0 //被认证方 [R1-Serial4/0/0]link-protocol ppp [R1-Serial4/0/0]ppp pap local-user huawei password cipher huawei123 [R1-Serial4/0/0]ip address 15.1.1.1 24R2与R5间使用PPP的chap认证：
[R5]aaa //主认证方 [R5-aaa]local-user qq password cipher qq123 Info: Add a new user. [R5-aaa]local-user qq service-type ppp [R5-aaa]int s4/0/1 [R5-Serial4/0/1]link-protocol ppp [R5-Serial4/0/1]ppp authentication-mode chap [R5-Serial4/0/1]ip address 25.1.1.1 24 [R2]int s4/0/1 //被认证方 [R2-Serial4/0/1]link-protocol ppp [R2-Serial4/0/1]ppp chap user qq [R2-Serial4/0/1]ppp chap password cipher qq123 [R2-Serial4/0/1]ip address 25.1.1.2 24R3与R5间使用HDLC封装：
[R3-LoopBack0]int s4/0/0 [R3-Serial4/0/0]link-protocol hdlc Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]:y [R3-Serial4/0/0]ip address 35.1.1.2 24 [R5]int s3/0/0 [R5-Serial3/0/0]link-protocol hdlc Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]:y [R5-Serial3/0/0]ip address 35.1.1.1 243、路由保证全网可达——各路由器缺省指向R5
[R1]ip route-static 0.0.0.0 0 15.1.1.2 [R2]ip route-static 0.0.0.0 0 25.1.1.1 [R3]ip route-static 0.0.0.0 0 35.1.1.1 [R4]ip route-static 0.0.0.0 0 45.1.1.1R1-4做net使得所有路由器基于环回私有地址为源ip时，可以正常访问R5环回。
[R1]acl 2000 [R1-acl-basic-2000]rule 5 permit source 192.168.1.0 0.0.0.255 [R1-acl-basic-2000]q [R1]int s4/0/0 [R1-Serial4/0/0]nat outbound 2000 [R1-Serial4/0/0]display nat outbound NAT Outbound Information: -------------------------------------------------------------------------- Interface Acl Address-group/IP/Interface Type -------------------------------------------------------------------------- Serial4/0/0 2000 15.1.1.1 easyip -------------------------------------------------------------------------- [R2]acl 2000 [R2-acl-basic-2000]rule 5 permit source 192.168.2.0 0.0.0.255 [R2-acl-basic-2000]q [R2]int s4/0/1 [R2-Serial4/0/1]nat outbound 2000 [R3]acl 2000 [R3-acl-basic-2000]rule 5 permit source 192.168.3.0 0.0.0.255 [R3-acl-basic-2000]q [R3]int s4/0/0 [R3-Serial4/0/0]nat outbound 2000 [R3-Serial4/0/0]display nat outbound [R4]acl 2000 [R4-acl-basic-2000]rule 5 permit source 192.168.4.0 0.0.0.255 [R4-acl-basic-2000]q [R4]int g0/0/0 [R4-GigabitEthernet0/0/0]nat outbound 2000 [R4-GigabitEthernet0/0/0]display nat outbound配置这一部分的时候遇到了两大问题：1）各路由器不能使用环回去pingR5的环回，这样做nat也是拼不通的，只能再额外加上一台PC。才可以ping通。2）在写PC3的时候网关地址和主机地址写错了导致一直没有ping通后来检查了几遍才通。 4、R1/2/3构建一个MGRE环境，R1为中心站点
中心站点： [R1]int Tunnel 0/0/0 [R1-Tunnel0/0/0]ip address 10.1.1.1 255.255.255.0 [R1-Tunnel0/0/0]tunnel-protocol gre p2mp [R1-Tunnel0/0/0]source 15.1.1.1 Sep 28 2020 17:54:51-08:00 R1 %IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface Tunnel0/0/0 has entered the UP state. [R1-Tunnel0/0/0]nhrp entry multicast dynamic [R1-Tunnel0/0/0]nhrp network-id 100 [R1-Tunnel0/0/0]display nhrp peer all ------------------------------------------------------------------------------- Protocol-addr Mask NBMA-addr NextHop-addr Type Flag ------------------------------------------------------------------------------- 10.1.1.2 32 25.1.1.2 10.1.1.2 dynamic route tunnel ------------------------------------------------------------------------------- Tunnel interface: Tunnel0/0/0 Created time : 00:02:22 Expire time : 01:57:38 ------------------------------------------------------------------------------- Protocol-addr Mask NBMA-addr NextHop-addr Type Flag ------------------------------------------------------------------------------- 10.1.1.3 32 35.1.1.2 10.1.1.3 dynamic route tunnel ------------------------------------------------------------------------------- Tunnel interface: Tunnel0/0/0 Created time : 00:00:31 Expire time : 01:59:29 Number of nhrp peers: 2 分支站点： [R2]int Tunnel 0/0/0 [R2-Tunnel0/0/0]ip address 10.1.1.2 255.255.255.0 [R2-Tunnel0/0/0]tunnel-protocol gre p2mp [R2-Tunnel0/0/0]source Serial 4/0/1 Sep 28 2020 18:17:30-08:00 R2 %IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface Tunnel0/0/0 has entered the UP state. [R2-Tunnel0/0/0]nhrp network-id 100 [R2-Tunnel0/0/0]nhrp entry 10.1.1.1 15.1.1.1 re [R2-Tunnel0/0/0]display nhrp peer all ------------------------------------------------------------------------------- Protocol-addr Mask NBMA-addr NextHop-addr Type Flag ------------------------------------------------------------------------------- 10.1.1.1 32 15.1.1.1 10.1.1.1 static hub ------------------------------------------------------------------------------- Tunnel interface: Tunnel0/0/0 Created time : 00:00:30 Expire time : -- Number of nhrp peers: 1 [R3]int Tunnel 0/0/0 [R3-Tunnel0/0/0]ip address 10.1.1.3 255.255.255.0 [R3-Tunnel0/0/0]tunnel-protocol gre p2mp [R3-Tunnel0/0/0]source s4/0/0 Sep 28 2020 18:19:18-08:00 R3 %IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface Tunnel0/0/0 has entered the UP state. [R3-Tunnel0/0/0]nhrp network-id 100 [R3-Tunnel0/0/0]nhrp entry 10.1.1.1 15.1.1.1 register [R3-Tunnel0/0/0]display nhrp peer all ------------------------------------------------------------------------------- Protocol-addr Mask NBMA-addr NextHop-addr Type Flag ------------------------------------------------------------------------------- 10.1.1.1 32 15.1.1.1 10.1.1.1 static hub ------------------------------------------------------------------------------- Tunnel interface: Tunnel0/0/0 Created time : 00:00:16 Expire time : -- Number of nhrp peers: 1R1/4间为点到点GRE
[R1]int Tunnel 0/0/1 [R1-Tunnel0/0/1]ip address 10.2.2.1 24 [R1-Tunnel0/0/1]tunnel-protocol gre [R1-Tunnel0/0/1]source 15.1.1.1 [R1-Tunnel0/0/1]destination 45.1.1.2 Sep 28 2020 18:12:33-08:00 R1 %IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface Tunnel0/0/1 has entered the UP state. [R4]int Tunnel 0/0/1 [R4-Tunnel0/0/1]ip address 10.2.2.2 24 [R4-Tunnel0/0/1]tunnel-protocol gre [R4-Tunnel0/0/1]source 45.1.1.2 [R4-Tunnel0/0/1]destination 15.1.1.1 Sep 28 2020 18:34:38-08:00 R4 %IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface Tunnel0/0/1 has entered the UP state.4、整个私有网络基于RIP全网可达——配置rip并在R1上打破水平分割，否则部分学不到路由。
[R1]rip 1 [R1-rip-1]version 2 [R1-rip-1]network 192.168.1.0 [R1-rip-1]network 10.0.0.0 [R2]rip 1 [R2-rip-1]version 2 [R2-rip-1]network 192.168.2.0 [R2-rip-1]network 10.0.0.0 [R3]rip 1 [R3-rip-1]version 2 [R3-rip-1]network 192.168.3.0 [R3-rip-1]network 10.0.0.0 [R4]rip 1 [R4-rip-1]version 2 [R4-rip-1]network 192.168.4.0 [R4-rip-1]network 10.0.0.0在R1上打破水平分割
[R1-Tunnel0/0/0]undo rip split-horizon至此，实验完成。
