disable unused ethernet ports

hch
 
Posts: 1
Joined: Tue May 17, 2016 3:09 am

disable unused ethernet ports

Tue May 17, 2016 3:40 am

Hi,

After read http://vonger.cn/?p=1880,
I believe there is a more elegant way to disable unused ethernet ports.

The kernel driver of rt305x switch has implemented the featrure, so we can disable ports via `swconfig`:

First we can probe switches:
Code: Select all
root@OpenWrt:~# swconfig list
Found: switch0 - rt305x


Show attributes of switch0:
Code: Select all
root@OpenWrt:~# swconfig dev switch0 show
Port 0:
   disable: 0
....
Port 1:
   disable: 0
....


Disable ports:
Code: Select all
root@OpenWrt:~# swconfig dev switch0 port 0 set disable 1
root@OpenWrt:~# swconfig dev switch0 port 1 set disable 1
root@OpenWrt:~# swconfig dev switch0 port 2 set disable 1
root@OpenWrt:~# swconfig dev switch0 port 3 set disable 1
root@OpenWrt:~# swconfig dev switch0 set apply


Show attributes again:
Code: Select all
root@OpenWrt:~# swconfig dev switch0 show
Port 0:
   disable: 1
....
Port 1:
   disable: 1
....


We can see port0~3 have been disabled.

This way is more reliable because the kernel driver knows the status of switch ports.

Note that the configuration will restrore to the enabled mode when type `/etc/init.d/network restart`,
to make the configuration persist, add the following line to `/etc/config/network`:
Code: Select all
config switch_port
   option device 'switch0'
   option port '0'
   option disable '1'

config switch_port
   option device 'switch0'
   option port '1'
   option disable '1'

config switch_port
   option device 'switch0'
   option port '2'
   option disable '1'

config switch_port
   option device 'switch0'
   option port '3'
   option disable '1'

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