1. 查看所有接口简要状态`
`,olt输出示例如下：“Olt1/0/1”就是OLT的端口名称，“UP”表示当前端口是开启的状态；“DOWN”表示当前端口是关闭的状态；
```
<8OLT>display interface brief
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface            Link Protocol Primary IP        Description
InLoop0              UP   UP(s)    --
Loop100              UP   UP(s)    172.16.0.72
NULL0                UP   UP(s)    --
REG0                 UP   --       --
Vlan100              UP   UP       172.16.3.29
Vlan2000             UP   UP       172.21.35.254     WIFI-user
Vlan3000             UP   UP       172.31.35.254     PC-user
Vlan4094             UP   UP       172.17.36.254     AP-Manage

Brief information on interfaces in bridge mode:
Link: ADM - administratively down; Stby - standby
Speed: (a) - auto
Duplex: (a)/A - auto; H - half; F - full
Type: A - access; T - trunk; H - hybrid
Interface            Link Speed     Duplex Type PVID Description
GE1/0/9              DOWN auto      A      A    1
GE1/0/10             DOWN auto      A      A    1
GE1/0/11             DOWN auto      A      A    1
GE1/0/12             DOWN auto      A      A    1
GE1/0/13             DOWN auto      A      A    1
GE1/0/14             DOWN auto      A      A    1
GE1/0/15             DOWN auto      A      A    1
GE1/0/16             UP   1G(a)     F(a)   T    100  TO-DH-BLCWXZHL-2F-3610
Olt1/0/1             UP   --        --     T    1
Olt1/0/2             UP   --        --     T    1
Olt1/0/3             UP   --        --     T    1
Olt1/0/4             DOWN --        --     T    1
Olt1/0/5             UP   --        --     T    1
Olt1/0/6             DOWN --        --     T    1
Olt1/0/7             UP   --        --     T    1
Olt1/0/8             DOWN --        --     T    1
Onu1/0/1:1           DOWN --        --     T    1
Onu1/0/1:2           DOWN --        --     T    1
Onu1/0/1:3           DOWN --        --     T    1
Onu1/0/1:4           DOWN --        --     T    1
Onu1/0/1:5           DOWN --        --     T    1
Onu1/0/1:6           UP   --        --     T    1
Onu1/0/1:7           UP   --        --     T    1
Onu1/0/1:8           DOWN --        --     T    1

```
2. 进入系统视图`system-view`
3. 进入端口视图`interface Olt1/0/1`
4. 关闭端口`shutdown`& 开启端口`undo shutdown`
5. 退出`quit`