前言
今天再次复习了下S5700交换机的三层聚合，但是奇怪的是，可能长时间没接触，容易忘。。又出问题了，翻了笔记本才发现原来是这个问题。
一、试验情况
二、命令如下
1.CE1
代码如下（示例）：
The device is running!
<HUAWEI>undo terminal monitor
Info: Current terminal monitor is off.
<HUAWEI>sys
Enter system view, return user view with return command.
[~HUAWEI]int
[~HUAWEI]interface eth
[~HUAWEI]interface Eth-Trunk 1
[*HUAWEI-Eth-Trunk1]undo portswitch
[*HUAWEI-Eth-Trunk1]ip add 10.1.1.1 24
[*HUAWEI-Eth-Trunk1]q
[*HUAWEI]int g1/0/0
[*HUAWEI-GE1/0/0]undo shutdown
[*HUAWEI-GE1/0/0]eth-trunk 1
[*HUAWEI-GE1/0/0]int g1/0/1
[*HUAWEI-GE1/0/1]undo shutdown
[*HUAWEI-GE1/0/1]eth-trunk 1
[*HUAWEI-GE1/0/1]q
[*HUAWEI]interface LoopBack 0
[*HUAWEI-LoopBack0]ip address 192.168.1.100 32
[*HUAWEI-LoopBack0]q
[*HUAWEI]ip route-static 192.168.2.100 32 10.1.1.2
2.CE2
代码如下（示例）：
The device is running!
<HUAWEI>undo terminal monitor
Info: Current terminal monitor is off.
<HUAWEI>sys
Enter system view, return user view with return command.
[~HUAWEI]int Eth-Trunk 1
[*HUAWEI-Eth-Trunk1]undo portswitch
[*HUAWEI-Eth-Trunk1]ip add 10.1.1.2 24
[*HUAWEI-Eth-Trunk1]q
[*HUAWEI]int g1/0/0
[*HUAWEI-GE1/0/0]undo shutdown
[*HUAWEI-GE1/0/0]eth-trunk 1
[*HUAWEI-GE1/0/0]int g1/0/1
[*HUAWEI-GE1/0/1]undo shutdown
[*HUAWEI-GE1/0/1]eth-trunk 1
[*HUAWEI-GE1/0/1]q
[*HUAWEI]int
[*HUAWEI]interface LoopBack 0
[*HUAWEI-LoopBack0]ip add 192.168.2.100 32
[*HUAWEI-LoopBack0]q
[*HUAWEI]ip route-static 192.168.1.100 32 10.1.1.1
问题出现
问题来了，不通。。。。。
查看问题所在
老样子，翻出我的老笔记本，发现，原来用S5700交换机做三层聚合的时候，必须得最后退出进行保存配置，否则不生效，所以我又重新来过
1.CE1
代码如下（示例）：
The device is running!
<HUAWEI>undo terminal monitor
Info: Current terminal monitor is off.
<HUAWEI>sys
Enter system view, return user view with return command.
[~HUAWEI]int
[~HUAWEI]interface eth
[~HUAWEI]interface Eth-Trunk 1
[*HUAWEI-Eth-Trunk1]undo portswitch
[*HUAWEI-Eth-Trunk1]ip add 10.1.1.1 24
[*HUAWEI-Eth-Trunk1]q
[*HUAWEI]int g1/0/0
[*HUAWEI-GE1/0/0]undo shutdown
[*HUAWEI-GE1/0/0]eth-trunk 1
[*HUAWEI-GE1/0/0]int g1/0/1
[*HUAWEI-GE1/0/1]undo shutdown
[*HUAWEI-GE1/0/1]eth-trunk 1
[*HUAWEI-GE1/0/1]q
[*HUAWEI]interface LoopBack 0
[*HUAWEI-LoopBack0]ip address 192.168.1.100 32
[*HUAWEI-LoopBack0]q
[*HUAWEI]ip route-static 192.168.2.100 32 10.1.1.2
[*HUAWEI]q
Warning: Uncommitted configurations found. Are you sure to commit them before ex
iting? [Y(yes)/N(no)/C(cancel)]:y
2.CE2
代码如下（示例）：
The device is running!
<HUAWEI>undo terminal monitor
Info: Current terminal monitor is off.
<HUAWEI>sys
Enter system view, return user view with return command.
[~HUAWEI]int Eth-Trunk 1
[*HUAWEI-Eth-Trunk1]undo portswitch
[*HUAWEI-Eth-Trunk1]ip add 10.1.1.2 24
[*HUAWEI-Eth-Trunk1]q
[*HUAWEI]int g1/0/0
[*HUAWEI-GE1/0/0]undo shutdown
[*HUAWEI-GE1/0/0]eth-trunk 1
[*HUAWEI-GE1/0/0]int g1/0/1
[*HUAWEI-GE1/0/1]undo shutdown
[*HUAWEI-GE1/0/1]eth-trunk 1
[*HUAWEI-GE1/0/1]q
[*HUAWEI]int
[*HUAWEI]interface LoopBack 0
[*HUAWEI-LoopBack0]ip add 192.168.2.100 32
[*HUAWEI-LoopBack0]q
[*HUAWEI]ip route-static 192.168.1.100 32 10.1.1.1
[*HUAWEI]q
Warning: Uncommitted configurations found. Are you sure to commit them before ex
iting? [Y(yes)/N(no)/C(cancel)]:y
查看连通性
1.CE1
<HUAWEI>ping 192.168.2.100
PING 192.168.2.100: 56 data bytes, press CTRL_C to break
Reply from 192.168.2.100: bytes=56 Sequence=1 ttl=255 time=12 ms
Reply from 192.168.2.100: bytes=56 Sequence=2 ttl=255 time=4 ms
Reply from 192.168.2.100: bytes=56 Sequence=3 ttl=255 time=5 ms
Reply from 192.168.2.100: bytes=56 Sequence=4 ttl=255 time=4 ms
Reply from 192.168.2.100: bytes=56 Sequence=5 ttl=255 time=4 ms
--- 192.168.2.100 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 4/5/12 ms
2.CE2
[~HUAWEI]ping 192.168.1.100
PING 192.168.1.100: 56 data bytes, press CTRL_C to break
Reply from 192.168.1.100: bytes=56 Sequence=1 ttl=255 time=11 ms
Reply from 192.168.1.100: bytes=56 Sequence=2 ttl=255 time=8 ms
Reply from 192.168.1.100: bytes=56 Sequence=3 ttl=255 time=5 ms
Reply from 192.168.1.100: bytes=56 Sequence=4 ttl=255 time=5 ms
Reply from 192.168.1.100: bytes=56 Sequence=5 ttl=255 time=4 ms
--- 192.168.1.100 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 4/6/11 ms
总结
果然啊，老师容易忘记这个很少出现的东西，还是得常复习啊。