路由器配置静态或默认路由实现 IP 子网之间的通信
按如下拓扑图配置
其中，路由器加入4GEW-T
PC配置如下
LSW1的配置
<Huawei>sys Enter system view, return user view with Ctrl+Z. [Huawei]sysname LSW1 [LSW1]vlan batch 10 Info: This operation may take a few seconds. Please wait for a moment...done. [LSW1] Sep 17 2023 19:04:40-08:00 LSW1 DS/4/DATASYNC_CFGCHANGE:OID 1.3.6.1.4.1.2011.5.2 5.191.3.1 configurations have been changed. The current change number is 5, the change loop count is 0, and the maximum number of records is 4095. [LSW1]undo info-center enable Info: Information center is disabled. [LSW1]port-group pvlan10 [LSW1-port-group-pvlan10]group-member g0/0/1 [LSW1-port-group-pvlan10]group-member g0/0/11 to g0/0/14 [LSW1-port-group-pvlan10]port link-type access [LSW1-GigabitEthernet0/0/1]port link-type access [LSW1-GigabitEthernet0/0/11]port link-type access [LSW1-GigabitEthernet0/0/12]port link-type access [LSW1-GigabitEthernet0/0/13]port link-type access [LSW1-GigabitEthernet0/0/14]port link-type access [LSW1-port-group-pvlan10]port default vlan 10 [LSW1-GigabitEthernet0/0/1]port default vlan 10 [LSW1-GigabitEthernet0/0/11]port default vlan 10 [LSW1-GigabitEthernet0/0/12]port default vlan 10 [LSW1-GigabitEthernet0/0/13]port default vlan 10 [LSW1-GigabitEthernet0/0/14]port default vlan 10 [LSW1-port-group-pvlan10]quit [LSW1]display vlan The total number of vlans is : 2 -------------------------------------------------------------------------------- U: Up; D: Down; TG: Tagged; UT: Untagged; MP: Vlan-mapping; ST: Vlan-stacking; #: ProtocolTransparent-vlan; *: Management-vlan; -------------------------------------------------------------------------------- VID Type Ports -------------------------------------------------------------------------------- 1 common UT:GE0/0/2(D) GE0/0/3(D) GE0/0/4(D) GE0/0/5(D) GE0/0/6(D) GE0/0/7(D) GE0/0/8(D) GE0/0/9(D) GE0/0/10(D) GE0/0/15(D) GE0/0/16(D) GE0/0/17(D) GE0/0/18(D) GE0/0/19(D) GE0/0/20(D) GE0/0/21(D) GE0/0/22(D) GE0/0/23(D) GE0/0/24(D) 10 common UT:GE0/0/1(U) GE0/0/11(U) GE0/0/12(U) GE0/0/13(U) GE0/0/14(U) VID Status Property MAC-LRN Statistics Description -------------------------------------------------------------------------------- 1 enable default enable disable VLAN 0001 10 enable default enable disable VLAN 0010 [LSW1]display port vlan Port Link Type PVID Trunk VLAN List ------------------------------------------------------------------------------- GigabitEthernet0/0/1 access 10 - GigabitEthernet0/0/2 hybrid 1 - GigabitEthernet0/0/3 hybrid 1 - GigabitEthernet0/0/4 hybrid 1 - GigabitEthernet0/0/5 hybrid 1 - GigabitEthernet0/0/6 hybrid 1 - GigabitEthernet0/0/7 hybrid 1 - GigabitEthernet0/0/8 hybrid 1 - GigabitEthernet0/0/9 hybrid 1 - GigabitEthernet0/0/10 hybrid 1 - GigabitEthernet0/0/11 access 10 - GigabitEthernet0/0/12 access 10 - GigabitEthernet0/0/13 access 10 - GigabitEthernet0/0/14 access 10 - GigabitEthernet0/0/15 hybrid 1 - GigabitEthernet0/0/16 hybrid 1 - GigabitEthernet0/0/17 hybrid 1 - GigabitEthernet0/0/18 hybrid 1 - GigabitEthernet0/0/19 hybrid 1 - GigabitEthernet0/0/20 hybrid 1 - GigabitEthernet0/0/21 hybrid 1 - GigabitEthernet0/0/22 hybrid 1 - GigabitEthernet0/0/23 hybrid 1 - GigabitEthernet0/0/24 hybrid 1 - [LSW1] 配置RTA <Huawei>SYS Enter system view, return user view with Ctrl+Z. [Huawei]sysname RTA [RTA]int g4/0/0 [RTA-GigabitEthernet4/0/0]ip address 192.168.10.1 24 Sep 17 2023 19:10:17-08:00 RTA %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface GigabitEthernet4/0/0 has entered the UP state. [RTA-GigabitEthernet4/0/0]qu [RTA]int g0/0/0 [RTA-GigabitEthernet0/0/0]ip address 172.16.101.1 24 Sep 17 2023 19:10:39-08:00 RTA %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the UP state. [RTA-GigabitEthernet0/0/0]qu [RTA]int g0/0/1 [RTA-GigabitEthernet0/0/1]ip address 172.16.103.1 24 [RTA-GigabitEthernet0/0/1] Sep 17 2023 19:10:59-08:00 RTA %%01IFNET/4/LINK_STATE(l)[2]:The line protocol IP on the interface GigabitEthernet0/0/1 has entered the UP state. [RTA-GigabitEthernet0/0/1]qu [RTA] 配置RTB <Huawei>sys Enter system view, return user view with Ctrl+Z. [Huawei]sysname RTB [RTB]int g4/0/0 [RTB-GigabitEthernet4/0/0]ip address 192.168.30.1 24 Sep 17 2023 19:12:19-08:00 RTB %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface GigabitEthernet4/0/0 has entered the UP state. [RTB-GigabitEthernet4/0/0]qu [RTB]int g0/0/0 [RTB-GigabitEthernet0/0/0]ip address 172.16.101.2 24 Sep 17 2023 19:12:43-08:00 RTB %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the UP state. [RTB-GigabitEthernet0/0/0]qu [RTB]interface g0/0/1 [RTB-GigabitEthernet0/0/1]ip address 172.16.102.2 24 Sep 17 2023 19:13:02-08:00 RTB %%01IFNET/4/LINK_STATE(l)[2]:The line protocol IP on the interface GigabitEthernet0/0/1 has entered the UP state. [RTB-GigabitEthernet0/0/1]qu 配置RTC <Huawei>sys Enter system view, return user view with Ctrl+Z. [Huawei]sysname RTC [RTC]int g4/0/0 [RTC-GigabitEthernet4/0/0]ip address 192.168.80.1 24 Sep 17 2023 19:15:08-08:00 RTC %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface GigabitEthernet4/0/0 has entered the UP state. [RTC-GigabitEthernet4/0/0]qu [RTC]int g4/0/1 [RTC-GigabitEthernet4/0/1]ip address 192.168.81.1 24 Sep 17 2023 19:15:28-08:00 RTC %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP on the interface GigabitEthernet4/0/1 has entered the UP state. [RTC-GigabitEthernet4/0/1]qu [RTC]interface g0/0/0 [RTC-GigabitEthernet0/0/0]ip address 172.16.103.2 24 Sep 17 2023 19:15:50-08:00 RTC %%01IFNET/4/LINK_STATE(l)[2]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the UP state. [RTC-GigabitEthernet0/0/0]qu [RTC]interface g0/0/1 [RTC-GigabitEthernet0/0/1]ip address 172.16.102.1 24 Sep 17 2023 19:16:08-08:00 RTC %%01IFNET/4/LINK_STATE(l)[3]:The line protocol IP on the interface GigabitEthernet0/0/1 has entered the UP state. [RTC-GigabitEthernet0/0/1]qu
路由规划如下
招生就业部的计算机最多，可以使用默认路由。
同时将路由器RTB到招生就业部网络的路由设置为静态路由，下一跳地址为路由 器RTA的172.16.101.1。
将路由器RTB到学籍管理部和考试中心网络的路由设置为默 认路由，下一跳地址为路由器RTC的172.16.102.1。
配置路由器RTA的路由
<RTA> <RTA>sys Enter system view, return user view with Ctrl+Z. [RTA]ip route-static 0.0.0.0 0.0.0.0 172.16.101.2 [RTA]display IP routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 14 Routes : 14 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.101.2 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.101.0/24 Direct 0 0 D 172.16.101.1 GigabitEthernet 0/0/0 172.16.101.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.103.0/24 Direct 0 0 D 172.16.103.1 GigabitEthernet 0/0/1 172.16.103.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.103.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 192.168.10.0/24 Direct 0 0 D 192.168.10.1 GigabitEthernet 4/0/0 192.168.10.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.10.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 配置路由器RTB的路由 [RTB]ip route-static 192.168.10.0 24 172.16.101.1 [RTB]ip route-static 0.0.0.0 0.0.0.0 172.16.102.1 [RTB]display IP routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 15 Routes : 15 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.102.1 GigabitEthernet 0/0/1 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.101.0/24 Direct 0 0 D 172.16.101.2 GigabitEthernet 0/0/0 172.16.101.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.102.0/24 Direct 0 0 D 172.16.102.2 GigabitEthernet 0/0/1 172.16.102.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.102.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 192.168.10.0/24 Static 60 0 RD 172.16.101.1 GigabitEthernet 0/0/0 192.168.30.0/24 Direct 0 0 D 192.168.30.1 GigabitEthernet 4/0/0 192.168.30.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.30.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 配置路由器RTC的路由 <Huawei>sys Enter system view, return user view with Ctrl+Z. [Huawei]sysname RTC [RTC]int g4/0/0 [RTC-GigabitEthernet4/0/0]ip address 192.168.80.1 24 Sep 17 2023 19:15:08-08:00 RTC %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface GigabitEthernet4/0/0 has entered the UP state. [RTC-GigabitEthernet4/0/0]qu [RTC]int g4/0/1 [RTC-GigabitEthernet4/0/1]ip address 192.168.81.1 24 Sep 17 2023 19:15:28-08:00 RTC %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP on the interface GigabitEthernet4/0/1 has entered the UP state. [RTC-GigabitEthernet4/0/1]qu [RTC]interface g0/0/0 [RTC-GigabitEthernet0/0/0]ip address 172.16.103.2 24 Sep 17 2023 19:15:50-08:00 RTC %%01IFNET/4/LINK_STATE(l)[2]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the UP state. [RTC-GigabitEthernet0/0/0]qu [RTC]interface g0/0/1 [RTC-GigabitEthernet0/0/1]ip address 172.16.102.1 24 Sep 17 2023 19:16:08-08:00 RTC %%01IFNET/4/LINK_STATE(l)[3]:The line protocol IP on the interface GigabitEthernet0/0/1 has entered the UP state. [RTC-GigabitEthernet0/0/1]qu [RTC] Please check whether system data has been changed, and save data in time Configuration console time out, please press any key to log on <RTC>sys Enter system view, return user view with Ctrl+Z. [RTC]ip route-static 0.0.0.0 0.0.0.0 172.16.103.1 [RTC]display IP routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 17 Routes : 17 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.103.1 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.102.0/24 Direct 0 0 D 172.16.102.1 GigabitEthernet 0/0/1 172.16.102.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.102.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.103.0/24 Direct 0 0 D 172.16.103.2 GigabitEthernet 0/0/0 172.16.103.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.103.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 192.168.80.0/24 Direct 0 0 D 192.168.80.1 GigabitEthernet 4/0/0 192.168.80.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.80.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.81.0/24 Direct 0 0 D 192.168.81.1 GigabitEthernet 4/0/1 192.168.81.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/1 192.168.81.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/1 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 在PC-10-1测试是否能与PC-30-1、PC-80-1和PC-81-1通信： PC>ping 192.168.30.11 Ping 192.168.30.11: 32 data bytes, Press Ctrl_C to break From 192.168.30.11: bytes=32 seq=1 ttl=126 time=47 ms From 192.168.30.11: bytes=32 seq=2 ttl=126 time=47 ms From 192.168.30.11: bytes=32 seq=3 ttl=126 time=31 ms From 192.168.30.11: bytes=32 seq=4 ttl=126 time=32 ms From 192.168.30.11: bytes=32 seq=5 ttl=126 time=31 ms --- 192.168.30.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 31/37/47 ms PC>ping 192.168.80.11 Ping 192.168.80.11: 32 data bytes, Press Ctrl_C to break From 192.168.80.11: bytes=32 seq=1 ttl=126 time=47 ms From 192.168.80.11: bytes=32 seq=2 ttl=126 time=16 ms From 192.168.80.11: bytes=32 seq=3 ttl=126 time=47 ms From 192.168.80.11: bytes=32 seq=4 ttl=126 time=47 ms From 192.168.80.11: bytes=32 seq=5 ttl=126 time=62 ms --- 192.168.80.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 16/43/62 ms PC>ping 192.168.81.11 Ping 192.168.81.11: 32 data bytes, Press Ctrl_C to break From 192.168.81.11: bytes=32 seq=1 ttl=126 time=47 ms From 192.168.81.11: bytes=32 seq=2 ttl=126 time=47 ms From 192.168.81.11: bytes=32 seq=3 ttl=126 time=31 ms From 192.168.81.11: bytes=32 seq=4 ttl=126 time=47 ms From 192.168.81.11: bytes=32 seq=5 ttl=126 time=47 ms --- 192.168.81.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 31/43/47 ms 在PC-30-1测试是否能与PC-10-1、PC-80-1和PC-81-1通信： PC>ping 192.168.10.11 Ping 192.168.10.11: 32 data bytes, Press Ctrl_C to break Request timeout! From 192.168.10.11: bytes=32 seq=2 ttl=126 time=63 ms From 192.168.10.11: bytes=32 seq=3 ttl=126 time=47 ms From 192.168.10.11: bytes=32 seq=4 ttl=126 time=47 ms From 192.168.10.11: bytes=32 seq=5 ttl=126 time=47 ms --- 192.168.10.11 ping statistics --- 5 packet(s) transmitted 4 packet(s) received 20.00% packet loss round-trip min/avg/max = 0/51/63 ms PC>ping 192.168.80.11 Ping 192.168.80.11: 32 data bytes, Press Ctrl_C to break Request timeout! From 192.168.80.11: bytes=32 seq=2 ttl=125 time=15 ms From 192.168.80.11: bytes=32 seq=3 ttl=125 time=32 ms From 192.168.80.11: bytes=32 seq=4 ttl=125 time=15 ms From 192.168.80.11: bytes=32 seq=5 ttl=125 time=16 ms --- 192.168.80.11 ping statistics --- 5 packet(s) transmitted 4 packet(s) received 20.00% packet loss round-trip min/avg/max = 0/19/32 ms PC>ping 192.168.81.11 Ping 192.168.81.11: 32 data bytes, Press Ctrl_C to break Request timeout! From 192.168.81.11: bytes=32 seq=2 ttl=125 time=16 ms From 192.168.81.11: bytes=32 seq=3 ttl=125 time=16 ms From 192.168.81.11: bytes=32 seq=4 ttl=125 time=31 ms From 192.168.81.11: bytes=32 seq=5 ttl=125 time=16 ms --- 192.168.81.11 ping statistics --- 5 packet(s) transmitted 4 packet(s) received 20.00% packet loss round-trip min/avg/max = 0/19/31 ms 在PC-80-1测试是否能与PC-10-1、PC-30-1和PC-81-1通信： PC>ping 192.168.10.11 Ping 192.168.10.11: 32 data bytes, Press Ctrl_C to break Request timeout! From 192.168.10.11: bytes=32 seq=2 ttl=125 time=46 ms From 192.168.10.11: bytes=32 seq=3 ttl=125 time=47 ms From 192.168.10.11: bytes=32 seq=4 ttl=125 time=63 ms From 192.168.10.11: bytes=32 seq=5 ttl=125 time=47 ms --- 192.168.10.11 ping statistics --- 5 packet(s) transmitted 4 packet(s) received 20.00% packet loss round-trip min/avg/max = 0/50/63 ms PC>ping 192.168.30.11 Ping 192.168.30.11: 32 data bytes, Press Ctrl_C to break Request timeout! From 192.168.30.11: bytes=32 seq=2 ttl=126 time=15 ms From 192.168.30.11: bytes=32 seq=3 ttl=126 time=32 ms From 192.168.30.11: bytes=32 seq=4 ttl=126 time=15 ms From 192.168.30.11: bytes=32 seq=5 ttl=126 time=16 ms --- 192.168.30.11 ping statistics --- 5 packet(s) transmitted 4 packet(s) received 20.00% packet loss round-trip min/avg/max = 0/19/32 ms PC>ping 192.168.81.11 Ping 192.168.81.11: 32 data bytes, Press Ctrl_C to break From 192.168.81.11: bytes=32 seq=1 ttl=127 time=16 ms From 192.168.81.11: bytes=32 seq=2 ttl=127 time=16 ms From 192.168.81.11: bytes=32 seq=3 ttl=127 time=15 ms From 192.168.81.11: bytes=32 seq=4 ttl=127 time=16 ms From 192.168.81.11: bytes=32 seq=5 ttl=127 time=15 ms --- 192.168.81.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 15/15/16 ms 在PC-81-1测试是否能与PC-10-1、PC-30-1和PC-80-1通信： PC>ping 192.168.10.11 Ping 192.168.10.11: 32 data bytes, Press Ctrl_C to break From 192.168.10.11: bytes=32 seq=1 ttl=125 time=47 ms From 192.168.10.11: bytes=32 seq=2 ttl=125 time=47 ms From 192.168.10.11: bytes=32 seq=3 ttl=125 time=47 ms From 192.168.10.11: bytes=32 seq=4 ttl=125 time=62 ms From 192.168.10.11: bytes=32 seq=5 ttl=125 time=63 ms --- 192.168.10.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 47/53/63 ms PC>ping 192.168.30.11 Ping 192.168.30.11: 32 data bytes, Press Ctrl_C to break From 192.168.30.11: bytes=32 seq=1 ttl=126 time=31 ms From 192.168.30.11: bytes=32 seq=2 ttl=126 time=16 ms From 192.168.30.11: bytes=32 seq=3 ttl=126 time=15 ms From 192.168.30.11: bytes=32 seq=4 ttl=126 time=31 ms From 192.168.30.11: bytes=32 seq=5 ttl=126 time=32 ms --- 192.168.30.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 15/25/32 ms PC>ping 192.168.80.11 Ping 192.168.80.11: 32 data bytes, Press Ctrl_C to break From 192.168.80.11: bytes=32 seq=1 ttl=127 time=15 ms From 192.168.80.11: bytes=32 seq=2 ttl=127 time=16 ms From 192.168.80.11: bytes=32 seq=3 ttl=127 time=16 ms From 192.168.80.11: bytes=32 seq=4 ttl=127 time=15 ms From 192.168.80.11: bytes=32 seq=5 ttl=127 time=16 ms --- 192.168.80.11 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 15/15/16 ms
至此，我们可以看到，不同vlan间也可以进行相互通信
我们也可以通过tracert，跟踪分析数据包从源主机到目标主机的路径，例如
在PC-10-1中
PC>tracert 192.168.81.11 traceroute to 192.168.81.11, 8 hops max (ICMP), press Ctrl+C to stop 1 192.168.10.1 32 ms 46 ms 47 ms //第一跳为网关 2 172.16.101.2 32 ms 62 ms 78 ms //经过RTA的0/0/0端口 3 172.16.102.1 31 ms 47 ms 63 ms //经过RTC的0/0/1端口 4 192.168.81.11 47 ms 47 ms 46 ms //最后到达目标主机
地址聚合与最长前缀匹配路由配置
路由规划
将路由器 RTA 到所有其他用户网络的路由设置为默认路由，下一跳地址为路由器 RTB的172.16.101.2。
将路由器RTB到招生就业部网络 的路由设置为默认路由，下一跳地址为路由器RTA的172.16.101.1；由于学籍管理部和考试中心网络的IP地址是连续的，为减少路由条目，可以将它们聚合为一个地址 192.168.80.0/23，将到学籍管理部和考试中心网络的路由设置为静态路由，目的地址为聚合地址 192.168.80.0， 子网掩码 为 255.255.254.0 ， 下一跳地址为路由器RTC 的 172.16.102.1。
在路由器RTC的路由表中，配置一条到所有其他用户网络的默认路由，下一跳地址为路由器RTA的172.16.103.1。再增加一条经过路由器RTC到招生就业部计算机PC-10-4的静态路由，下一跳地址为路由器RTB的172.16.102.2。按最长前缀匹配规则，将其子网掩码设置为255.255.255.255(目标IP地址与指定的地址完全相同)。
对RTA路由器的配置
[RTA]ip route-static 0.0.0.0 0.0.0.0 172.16.101.2 [RTA]display ip routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 14 Routes : 14 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.101.2 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.101.0/24 Direct 0 0 D 172.16.101.1 GigabitEthernet 0/0/0 172.16.101.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.103.0/24 Direct 0 0 D 172.16.103.1 GigabitEthernet 0/0/1 172.16.103.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.103.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 192.168.10.0/24 Direct 0 0 D 192.168.10.1 GigabitEthernet 4/0/0 192.168.10.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.10.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 [RTA] 对RTB路由的配置 <RTB>sys Enter system view, return user view with Ctrl+Z. [RTB]ip route-static 192.168.80.0 23 172.16.102.1 [RTB]ip route-static 0.0.0.0 0.0.0.0 172.16.101.1 [RTB]display ip routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 15 Routes : 15 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.101.1 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.101.0/24 Direct 0 0 D 172.16.101.2 GigabitEthernet 0/0/0 172.16.101.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.102.0/24 Direct 0 0 D 172.16.102.2 GigabitEthernet 0/0/1 172.16.102.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.102.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 192.168.30.0/24 Direct 0 0 D 192.168.30.1 GigabitEthernet 4/0/0 192.168.30.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.30.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.80.0/23 Static 60 0 RD 172.16.102.1 GigabitEthernet 0/0/1 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 对RTC路由器进行配置 <RTC>sys Enter system view, return user view with Ctrl+Z. [RTC]ip route-static 192.168.10.14 32 172.16.102.2 [RTC]ip route-static 0.0.0.0 0.0.0.0 172.16.103.1 [RTC]display ip routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 18 Routes : 18 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.103.1 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.102.0/24 Direct 0 0 D 172.16.102.1 GigabitEthernet 0/0/1 172.16.102.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.102.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.103.0/24 Direct 0 0 D 172.16.103.2 GigabitEthernet 0/0/0 172.16.103.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.103.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 192.168.10.14/32 Static 60 0 RD 172.16.102.2 GigabitEthernet 0/0/1 192.168.80.0/24 Direct 0 0 D 192.168.80.1 GigabitEthernet 4/0/0 192.168.80.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.80.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.81.0/24 Direct 0 0 D 192.168.81.1 GigabitEthernet 4/0/1 192.168.81.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/1 192.168.81.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/1 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 配置完成后，结果和第一个相同，不同IP子网间能完成通信 在PC-80-1做以下tracert操作 PC>tracert 192.168.10.11 traceroute to 192.168.10.11, 8 hops max (ICMP), press Ctrl+C to stop 1 192.168.80.1 16 ms 16 ms <1 ms 2 172.16.103.1 15 ms 32 ms 15 ms 3 192.168.10.11 31 ms 47 ms 47 ms PC>tracert 192.168.10.14 traceroute to 192.168.10.14, 8 hops max (ICMP), press Ctrl+C to stop 1 192.168.80.1 16 ms 16 ms 15 ms 2 172.16.102.2 16 ms 31 ms 16 ms 3 172.16.101.1 15 ms 32 ms 31 ms 4 192.168.10.14 62 ms 79 ms 46 ms PC>tracert 192.168.30.11 traceroute to 192.168.30.11, 8 hops max (ICMP), press Ctrl+C to stop 1 192.168.80.1 16 ms <1 ms 15 ms 2 172.16.103.1 31 ms 16 ms 16 ms 3 172.16.101.2 15 ms 32 ms 31 ms 4 192.168.30.11 15 ms 32 ms 31 ms 将路由器RTB路由表中路由的目的地址 为 聚 合 地 址 192.168.80.0的子网掩码改为255.255.0.0，下一跳地址不变，仍为路由器RTC的172.16.102.1： <RTB>sys Enter system view, return user view with Ctrl+Z. [RTB]undo ip route-static 192.168.80.0 23 172.16.102.1 [RTB]ip route-static 192.168.80.0 16 172.16.102.1 Info: The destination address and mask of the configured static route mismatched , and the static route 192.168.0.0/16 was generated. [RTB]display ip routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 15 Routes : 15 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.101.1 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.101.0/24 Direct 0 0 D 172.16.101.2 GigabitEthernet 0/0/0 172.16.101.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.102.0/24 Direct 0 0 D 172.16.102.2 GigabitEthernet 0/0/1 172.16.102.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.102.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 192.168.0.0/16 Static 60 0 RD 172.16.102.1 GigabitEthernet 0/0/1 192.168.30.0/24 Direct 0 0 D 192.168.30.1 GigabitEthernet 4/0/0 192.168.30.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.30.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 #与之前的路由表进行对比 [RTB]display ip routing-table Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 15 Routes : 15 Destination/Mask Proto Pre Cost Flags NextHop Interface 0.0.0.0/0 Static 60 0 RD 172.16.101.1 GigabitEthernet 0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.101.0/24 Direct 0 0 D 172.16.101.2 GigabitEthernet 0/0/0 172.16.101.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/0 172.16.102.0/24 Direct 0 0 D 172.16.102.2 GigabitEthernet 0/0/1 172.16.102.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 172.16.102.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 0/0/1 192.168.30.0/24 Direct 0 0 D 192.168.30.1 GigabitEthernet 4/0/0 192.168.30.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.30.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet 4/0/0 192.168.80.0/23 Static 60 0 RD 172.16.102.1 GigabitEthernet 0/0/1 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
可以看到，目的地址变为了192.168.0.0/16，将较小的子网聚合为一个更大的子网后，减少了IP地址的使用，整个路由表的条目数量减少。
