标签：插入图片 dmi 没有 系统 子网 优先级 text ica res
@[toc]以太网工作在数据链路层
数据的三要素：1.语法2.语义3.同步（接口速率）
http：//7n4.cn/或https://mac.51240.xom可以查询MAC地址厂商
display mac-address 查看mac地址表
sysname R1 改名为R1
dis version 查看系统版本
interface gigabitethernet0/0/1 进入g0/0/1接口
ip- subnet-vlan 查看接口vlan网段信息
speed 10 接口速率配置为10M
undo negotiation auto 关闭自动协商
dis vlan 查看vlan接口分布表
int g0/0/0 进入g0/0/0 接口
ip add 192.168.1.1. 24 配置接口ip地址为192.168.1.1 子网掩码24位
undo shutdown 启用
pre 优先级
cost 花销值
即备份一条优先级比当前路由低的路由
实现三台路由器的loop 接口互联互通
1.配置参数已设置，接下来就开始配置
2.思路：loop接口的ip地址相当于路由器自身的一个直连网段
配置各个路由器的接口ip就开始配置相应的路由条目
1.1.1.1 去ping 2.2.2.2，有两条路可走，分别是R1》》R2，和R1》》R3》》R2，可以分别配置，先配置的优先级最高，后配置的最备用，等待优先级高的路由失效后就会触发优先级低的路由，以免因为链路损坏而影响数据及时传输
同理，1.1.1.1ping3.3.3.3 也是同样的道理
2.2.2.2ping3.3.3.3也是
在这里详细解释1.1.1.1去ping2.2.2.2的过程，剩下的举一反三即可
R1》》R2
对于1.1.1.1而言，2.2.2.2是R1的非直连网段，所以数据过去的话需要去给R1配置一条2.2.2.0的静态路由，下一跳为12.0.0.2；数据回来就是从R2返回到R1，需要给R2配置一条1.1.1.0的静态路由，下一跳为12.0.0.1
R1》》R3》》R2
首先，值得注意的是，数据一来一回的优先级必须在同一链路上，不可以分开
R1的数据传到R2，经过R3，需要给R1配置一条2.2.2.0的条目，下一跳为13.0.0.3，因为这个条目是第二个配置，所以在12.0.0.0正常作用的情况下，第二个条目不会被触发，这里配置这一条目，仅作备用；2.2.2.0也并不是R3的直连网段，所以需要给R3配置一条2.2.2.0的静态路由，下一跳为23.0.0.2。数据过去了，也要回来，配置路由的思路跟过去的一致，这里就不赘述了，开始配置
3.开启设备，先配置ip
R1
The device is running! ‘显示设备已运行‘
<Huawei>sys ‘systtem-view，进入系统视图‘
Enter system view, return user view with Ctrl+Z. ‘反馈已进入‘
[Huawei]undo info-center enable ‘关掉信息中心‘
Info: Information center is disabled. ‘反馈已关掉‘
[Huawei]int g0/0/0 ‘进入g0/0/0接口‘
[Huawei-GigabitEthernet0/0/0]ip add 12.0.0.1 24 ‘配置ip地址‘
[Huawei-GigabitEthernet0/0/0]undo shutdown ‘启用‘
Info: Interface GigabitEthernet0/0/0 is not shutdown. ‘反馈已启用‘
[Huawei-GigabitEthernet0/0/0]int g0/0/1 ‘进入g0/0/1接口‘
[Huawei-GigabitEthernet0/0/1]ip add 13.0.0.1 24 ‘配置IP地址‘
[Huawei-GigabitEthernet0/0/1]undo shutdown ‘启用‘
Info: Interface GigabitEthernet0/0/1 is not shutdown.
[Huawei-GigabitEthernet0/0/1]q ‘返回到系统视图‘
[Huawei]int LoopBack 0 ‘进入Loopback 0 接口‘
[Huawei-LoopBack0]ip address 1.1.1.1 24 ‘配置IP 地址‘
[Huawei-LoopBack0]q ‘返回，不需要手动启用‘
[Huawei]dis ip int brief ‘查看接口ip信息‘
*down: administratively down
!down: FIB overload down
^down: standby
(l): loopback
(s): spoofing
(d): Dampening Suppressed
The number of interface that is UP in Physical is 4
The number of interface that is DOWN in Physical is 8
The number of interface that is UP in Protocol is 4
The number of interface that is DOWN in Protocol is 8
Interface IP Address/Mask Physical Protocol
Ethernet0/0/0 unassigned down down
Ethernet0/0/1 unassigned down down
GigabitEthernet0/0/0 12.0.0.1/24 up up ‘已配置，up已启用‘
GigabitEthernet0/0/1 13.0.0.1/24 up up ‘已配置，up已启用‘
GigabitEthernet0/0/2 unassigned down down
GigabitEthernet0/0/3 unassigned down down
LoopBack0 1.1.1.1/24 up up(s) ‘已配置，up已启用‘
NULL0 unassigned up up(s)
Serial0/0/0 unassigned down down
Serial0/0/1 unassigned down down
Serial0/0/2 unassigned down down
Serial0/0/3 unassigned down down R2的ip配置
[Huawei]sysname R2 ‘更名为R2‘
[R2]
Nov 7 2019 19:37:53-08:00 R2 DS/4/DATASYNC_CFGCHANGE:OID 1.3.6.1.4.1.2011.5.25.
191.3.1 configurations have been changed. The current change number is 1, the ch
ange loop count is 0, and the maximum number of records is 4095.u ‘没有及时关掉信息中心，就会出现这个信息‘
[R2]undo info-center enable ‘关掉信息中心‘
Info: Information center is disabled. ‘反馈关掉‘
[R2]int g0/0/0 ‘进入g0/0/0接口‘
[R2-GigabitEthernet0/0/0]ip add 12.0.0.2 24 ‘配IP地址‘
[R2-GigabitEthernet0/0/0]undo shutdown ‘启用‘
Info: Interface GigabitEthernet0/0/0 is not shutdown.
[R2-GigabitEthernet0/0/0]int g0/0/2 ‘进入g0/0/2接口‘
[R2-GigabitEthernet0/0/2]ip add 23.0.0.2 24 ‘陪ip地址‘
[R2-GigabitEthernet0/0/2]undo shutdown ‘启用‘
Info: Interface GigabitEthernet0/0/2 is not shutdown.
[R2-GigabitEthernet0/0/2]q ‘返回上一层‘
[R2]int LoopBack 0 ‘进入loopback接口‘
[R2-LoopBack0]ip add 2.2.2.2 24 ‘配置ip地址‘
[R2-LoopBack0]q ‘返回上一层‘
[R2]dis ip int b ‘查看接口ip信息表‘
*down: administratively down
!down: FIB overload down
^down: standby
(l): loopback
(s): spoofing
(d): Dampening Suppressed
The number of interface that is UP in Physical is 4
The number of interface that is DOWN in Physical is 8
The number of interface that is UP in Protocol is 4
The number of interface that is DOWN in Protocol is 8
Interface IP Address/Mask Physical Protocol
Ethernet0/0/0 unassigned down down
Ethernet0/0/1 unassigned down down
GigabitEthernet0/0/0 12.0.0.2/24 up up ‘已配置，Up已启用‘
GigabitEthernet0/0/1 unassigned down down
GigabitEthernet0/0/2 23.0.0.2/24 up up ‘已配置，up已启用‘
GigabitEthernet0/0/3 unassigned down down
LoopBack0 2.2.2.2/24 up up(s) ‘已配置，up已启用‘
NULL0 unassigned up up(s)
Serial0/0/0 unassigned down down
Serial0/0/1 unassigned down down
Serial0/0/2 unassigned down down
Serial0/0/3 unassigned down down
[R2]R3的ip 配置
<Huawei>
<Huawei>system-view ‘进入系统视图‘
Enter system view, return user view with Ctrl+Z.
[Huawei]undo info-center enable ‘关掉信息中心‘
Info: Information center is disabled.
[Huawei]sysname R3 ‘更名为R3‘
[R3]int g0/0/1 ‘进入g0/0/1接口‘
[R3-GigabitEthernet0/0/1]ip add 13.0.0.3 24 ‘配置ip信息‘
[R3-GigabitEthernet0/0/1]undo shutdown ‘启用‘
Info: Interface GigabitEthernet0/0/1 is not shutdown.
[R3-GigabitEthernet0/0/1]int g0/0/2 ‘进入g0/0/2接口‘
[R3-GigabitEthernet0/0/2]ip add 23.0.0.3 24 ‘配置ip地址‘
[R3-GigabitEthernet0/0/2]undo shutdown ‘启用‘
Info: Interface GigabitEthernet0/0/2 is not shutdown.
[R3-GigabitEthernet0/0/2]q ‘返回上一层‘
[R3]int LoopBack 0 ‘进入loopback 0 接口‘
[R3-LoopBack0]ip add 3.3.3.3 24 ‘配置ip地址‘
[R3-LoopBack0]q ‘返回上一层‘
[R3]int LoopBack 1
[R3-LoopBack1]ip add 4.4.4.4 24
[R3-LoopBack1]q
[R3]dis ip interface brief ‘查看接口ip信息表‘
*down: administratively down
!down: FIB overload down
^down: standby
(l): loopback
(s): spoofing
(d): Dampening Suppressed
The number of interface that is UP in Physical is 5
The number of interface that is DOWN in Physical is 8
The number of interface that is UP in Protocol is 5
The number of interface that is DOWN in Protocol is 8
Interface IP Address/Mask Physical Protocol
Ethernet0/0/0 unassigned down down
Ethernet0/0/1 unassigned down down
GigabitEthernet0/0/0 unassigned down down
GigabitEthernet0/0/1 13.0.0.3/24 up up ‘已配置，up已开启‘
GigabitEthernet0/0/2 23.0.0.3/24 up up ‘已配置，up已开启‘
GigabitEthernet0/0/3 unassigned down down
LoopBack0 3.3.3.3/24 up up(s) ‘已配置，uo已开启‘
LoopBack1 4.4.4.4/24 up up(s) ‘已配置，up已开启‘
NULL0 unassigned up up(s)
Serial0/0/0 unassigned down down
Serial0/0/1 unassigned down down
Serial0/0/2 unassigned down down
Serial0/0/3 unassigned down down
ip配置完毕，接下来就开始配置路由，先从1.1.1.1去ping 2.2.2.2的思路去配置
R1
<Huawei>system-view ‘进入系统视图‘
Enter system view, return user view with Ctrl+Z.
[Huawei]sysname R1 ‘改名为R1‘
[R1]
Nov 7 2019 19:45:23-08:00 R1 DS/4/DATASYNC_CFGCHANGE:OID 1.3.6.1.4.1.2011.5.25.
191.3.1 configurations have been changed. The current change number is 5, the ch
ange loop count is 0, and the maximum number of records is 4095. ‘出现信息中心的信息‘
Info: Information center is disabled. ‘关掉信息中心‘
[R1]ip route-static 2.2.2.0 24 12.0.0.2 ‘配置静态路由，目标网段2.2.2.0，下一跳12.0.0.2‘
R2
[R2]ip route-static 1.1.1.0 24 12.0.0.1 ‘配置静态路由，目标网段1.1.1.0 下一跳为12.0.0.1‘R1的1.1.1.1 去ping 2.2.2.2
[R1]ping -a 1.1.1.1 2.2.2.2 ‘-a指定源ip地址‘
PING 2.2.2.2: 56 data bytes, press CTRL_C to break
Reply from 2.2.2.2: bytes=56 Sequence=1 ttl=255 time=50 ms ‘成功‘
Reply from 2.2.2.2: bytes=56 Sequence=2 ttl=255 time=20 ms
Reply from 2.2.2.2: bytes=56 Sequence=3 ttl=255 time=50 ms
Reply from 2.2.2.2: bytes=56 Sequence=4 ttl=255 time=30 ms
Reply from 2.2.2.2: bytes=56 Sequence=5 ttl=255 time=20 ms
--- 2.2.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 20/34/50 ms
接下来配置备用路由，即R1》》R3》》R2
R1
[R1]ip route-static 2.2.2.0 24 13.0.0.3 ‘配置静态路由‘R3
[R3]ip route-static 2.2.2.0 24 23.0.0.2 ‘配置静态路由‘再往回配
R2
[R2]ip route-static 1.1.1.0 24 23.0.0.3R3
[R3]ip route-static 1.1.1.0 24 13.0.0.1接下来可以把12.0.0.0/24的链路中断
R1操作方法
[R1]int g0/0/0 ‘进入对应网段接口‘
[R1-GigabitEthernet0/0/0]shutdown ‘关闭‘
[R1-GigabitEthernet0/0/0]q这个时候再ping一波
[R1]ping -a 1.1.1.1 2.2.2.2
PING 2.2.2.2: 56 data bytes, press CTRL_C to break
Reply from 2.2.2.2: bytes=56 Sequence=1 ttl=254 time=80 ms
Reply from 2.2.2.2: bytes=56 Sequence=2 ttl=254 time=60 ms
Reply from 2.2.2.2: bytes=56 Sequence=3 ttl=254 time=60 ms
Reply from 2.2.2.2: bytes=56 Sequence=4 ttl=254 time=60 ms
Reply from 2.2.2.2: bytes=56 Sequence=5 ttl=254 time=50 ms
--- 2.2.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 50/62/80 ms查看一下此时R1的路由表
[R1]dis ip routing-table ‘查看路由表‘
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 7 Routes : 7
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
2.2.2.0/24 Static 60 0 RD 13.0.0.3 GigabitEthernet ‘注意这一条‘
0/0/1
13.0.0.0/24 Direct 0 0 D 13.0.0.1 GigabitEthernet
0/0/1
13.0.0.1/32 Direct 0 0 D 127.0.0.1 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恢复12.0.0.1链路，再次查看路由表
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]undo shutdown
[R1-GigabitEthernet0/0/0]q
[R1]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 9 Routes : 10
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
2.2.2.0/24 Static 60 0 RD 12.0.0.2 GigabitEthernet ‘注意这一条‘
0/0/0
Static 60 0 RD 13.0.0.3 GigabitEthernet
0/0/1
12.0.0.0/24 Direct 0 0 D 12.0.0.1 GigabitEthernet
0/0/0
12.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
13.0.0.0/24 Direct 0 0 D 13.0.0.1 GigabitEthernet
0/0/1
13.0.0.1/32 Direct 0 0 D 127.0.0.1 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接下来就主要按部就班把其余的以同样的形式配置好即可
1.1.1.1 ping 3.3.3.3
R1
[R1]ip route-static 3.3.3.0 24 13.0.0.3R3
[R3]ip route-static 1.1.1.0 24 13.0.0.1
Error: The route already exists. ‘显示之前已被配置过‘备用路由
R1
[R1]ip route-static 3.3.3.0 24 12.0.0.2R2
[R2]ip route-static 3.3.3.0 24 23.0.0.3R3
[R3]ip route-static 1.1.1.0 24 23.0.0.2R2
[R2]ip route-static 1.1.1.0 24 12.0.0.1
Error: The route already exists.2.2.2.2 ping 3.3.3.3
R2
[R2]ip route-static 3.3.3.0 24 23.0.0.3
Error: The route already exists.R3
[R3]ip route-static 2.2.2.0 24 23.0.0.2
Error: The route already exists.再去配置另一条备用路由
R2》》R1》》R3
R2
[R2]ip route-static 3.3.3.0 24 12.0.0.1R1
[R1]ip route-static 3.3.3.0 24 13.0.0.3
Error: The route already exists.R3
[R3]ip route-static 2.2.2.0 24 13.0.0.1R1
[R1]ip route-static 2.2.2.0 24 12.0.0.2
Error: The route already exists.完毕
接下来1.1.1.1 ping 3.3.3.3
[R1]ping -a 1.1.1.1 3.3.3.3
PING 3.3.3.3: 56 data bytes, press CTRL_C to break
Reply from 3.3.3.3: bytes=56 Sequence=1 ttl=255 time=40 ms
Reply from 3.3.3.3: bytes=56 Sequence=2 ttl=255 time=40 ms
Reply from 3.3.3.3: bytes=56 Sequence=3 ttl=255 time=50 ms
Reply from 3.3.3.3: bytes=56 Sequence=4 ttl=255 time=30 ms
Reply from 3.3.3.3: bytes=56 Sequence=5 ttl=255 time=50 ms
--- 3.3.3.3 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 30/42/50 ms2.2.2.2去ping 3.3.3.3
[R2]ping -a 2.2.2.2 3.3.3.3
PING 3.3.3.3: 56 data bytes, press CTRL_C to break
Reply from 3.3.3.3: bytes=56 Sequence=1 ttl=255 time=40 ms
Reply from 3.3.3.3: bytes=56 Sequence=2 ttl=255 time=50 ms
Reply from 3.3.3.3: bytes=56 Sequence=3 ttl=255 time=20 ms
Reply from 3.3.3.3: bytes=56 Sequence=4 ttl=255 time=50 ms
Reply from 3.3.3.3: bytes=56 Sequence=5 ttl=255 time=50 ms
--- 3.3.3.3 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 20/42/50 ms
查看各个路由器的路由表
R1
[R1]dis ip routing-table ‘查看路由表‘
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 10 Routes : 12
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
2.2.2.0/24 Static 60 0 RD 12.0.0.2 GigabitEthernet
0/0/0
Static 60 0 RD 13.0.0.3 GigabitEthernet ‘备用路由‘
0/0/1
3.3.3.0/24 Static 60 0 RD 13.0.0.3 GigabitEthernet
0/0/1
Static 60 0 RD 12.0.0.2 GigabitEthernet ‘备用路由‘
0/0/0
12.0.0.0/24 Direct 0 0 D 12.0.0.1 GigabitEthernet
0/0/0
12.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
13.0.0.0/24 Direct 0 0 D 13.0.0.1 GigabitEthernet
0/0/1
13.0.0.1/32 Direct 0 0 D 127.0.0.1 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
R2
[R2]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 10 Routes : 12
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Static 60 0 RD 12.0.0.1 GigabitEthernet
0/0/0
Static 60 0 RD 23.0.0.3 GigabitEthernet ‘备用路由‘
0/0/2
2.2.2.0/24 Direct 0 0 D 2.2.2.2 LoopBack0
2.2.2.2/32 Direct 0 0 D 127.0.0.1 LoopBack0
3.3.3.0/24 Static 60 0 RD 23.0.0.3 GigabitEthernet
0/0/2
Static 60 0 RD 12.0.0.1 GigabitEthernet ‘备用路由‘
0/0/0
12.0.0.0/24 Direct 0 0 D 12.0.0.2 GigabitEthernet
0/0/0
12.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
23.0.0.0/24 Direct 0 0 D 23.0.0.2 GigabitEthernet
0/0/2
23.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
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
R3
[R3]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 12 Routes : 14
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Static 60 0 RD 13.0.0.1 GigabitEthernet
0/0/1
Static 60 0 RD 23.0.0.2 GigabitEthernet ‘备用路由‘
0/0/2
2.2.2.0/24 Static 60 0 RD 23.0.0.2 GigabitEthernet
0/0/2
Static 60 0 RD 13.0.0.1 GigabitEthernet ‘备用路由‘
0/0/1
3.3.3.0/24 Direct 0 0 D 3.3.3.3 LoopBack0
3.3.3.3/32 Direct 0 0 D 127.0.0.1 LoopBack0
4.4.4.0/24 Direct 0 0 D 4.4.4.4 LoopBack1
4.4.4.4/32 Direct 0 0 D 127.0.0.1 LoopBack1
13.0.0.0/24 Direct 0 0 D 13.0.0.3 GigabitEthernet
0/0/1
13.0.0.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
23.0.0.0/24 Direct 0 0 D 23.0.0.3 GigabitEthernet
0/0/2
23.0.0.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
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
```shell
可以发现各少了一个网段，但是并不影响loop间的互联互通
可以断掉一条链路，去测试备用链路
断掉R1的g0/0/1
```shell
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]shutdown 再次ping一波
[R1]ping -a 1.1.1.1 2.2.2.2
PING 2.2.2.2: 56 data bytes, press CTRL_C to break
Reply from 2.2.2.2: bytes=56 Sequence=1 ttl=254 time=80 ms
Reply from 2.2.2.2: bytes=56 Sequence=2 ttl=254 time=60 ms
Reply from 2.2.2.2: bytes=56 Sequence=3 ttl=254 time=80 ms
Reply from 2.2.2.2: bytes=56 Sequence=4 ttl=254 time=60 ms
Reply from 2.2.2.2: bytes=56 Sequence=5 ttl=254 time=60 ms
--- 2.2.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 60/68/80 ms
[R1]ping -a 1.1.1.1 3.3.3.3
PING 3.3.3.3: 56 data bytes, press CTRL_C to break
Reply from 3.3.3.3: bytes=56 Sequence=1 ttl=255 time=10 ms
Reply from 3.3.3.3: bytes=56 Sequence=2 ttl=255 time=50 ms
Reply from 3.3.3.3: bytes=56 Sequence=3 ttl=255 time=50 ms
Reply from 3.3.3.3: bytes=56 Sequence=4 ttl=255 time=40 ms
Reply from 3.3.3.3: bytes=56 Sequence=5 ttl=255 time=30 ms
--- 3.3.3.3 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 10/36/50 ms
[R2]ping -a 2.2.2.2 3.3.3.3
PING 3.3.3.3: 56 data bytes, press CTRL_C to break
Reply from 3.3.3.3: bytes=56 Sequence=1 ttl=255 time=20 ms
Reply from 3.3.3.3: bytes=56 Sequence=2 ttl=255 time=10 ms
Reply from 3.3.3.3: bytes=56 Sequence=3 ttl=255 time=50 ms
Reply from 3.3.3.3: bytes=56 Sequence=4 ttl=255 time=40 ms
Reply from 3.3.3.3: bytes=56 Sequence=5 ttl=255 time=50 ms
--- 3.3.3.3 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 10/34/50 ms
并不影响
再次查看路由表
R1
[R1]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 8 Routes : 8
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
2.2.2.0/24 Static 60 0 RD 13.0.0.3 GigabitEthernet ‘备用路由‘
0/0/1
3.3.3.0/24 Static 60 0 RD 13.0.0.3 GigabitEthernet
0/0/1
13.0.0.0/24 Direct 0 0 D 13.0.0.1 GigabitEthernet
0/0/1
13.0.0.1/32 Direct 0 0 D 127.0.0.1 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
R2
[R2]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 8 Routes : 8
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Static 60 0 RD 23.0.0.3 GigabitEthernet ‘备用路由‘
0/0/2
2.2.2.0/24 Direct 0 0 D 2.2.2.2 LoopBack0
2.2.2.2/32 Direct 0 0 D 127.0.0.1 LoopBack0
3.3.3.0/24 Static 60 0 RD 23.0.0.3 GigabitEthernet
0/0/2
23.0.0.0/24 Direct 0 0 D 23.0.0.2 GigabitEthernet
0/0/2
23.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
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
R3
[R3]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 12 Routes : 14
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Static 60 0 RD 13.0.0.1 GigabitEthernet
0/0/1
Static 60 0 RD 23.0.0.2 GigabitEthernet
0/0/2
2.2.2.0/24 Static 60 0 RD 23.0.0.2 GigabitEthernet
0/0/2
Static 60 0 RD 13.0.0.1 GigabitEthernet
0/0/1
3.3.3.0/24 Direct 0 0 D 3.3.3.3 LoopBack0
3.3.3.3/32 Direct 0 0 D 127.0.0.1 LoopBack0
4.4.4.0/24 Direct 0 0 D 4.4.4.4 LoopBack1
4.4.4.4/32 Direct 0 0 D 127.0.0.1 LoopBack1
13.0.0.0/24 Direct 0 0 D 13.0.0.3 GigabitEthernet
0/0/1
13.0.0.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
23.0.0.0/24 Direct 0 0 D 23.0.0.3 GigabitEthernet
0/0/2
23.0.0.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
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
跟12.0.0.0相关的都改用了备用链路，再次印证了之前说的一个原理
标签：插入图片 dmi 没有 系统 子网 优先级 text ica res
原文地址：https://blog.51cto.com/14558445/2448638
