how can i shutdown the PHYSICAL interface of an ethernet interface

[Chetan Khatri]

I would like to shutdown the physical interface of an ethernet interface, without disconnecting the cable that is connected to this interface.

Basically, I would like to shutdown the LED of the ethernet interface.

If I do 

ifconfig eth2 down

then the IP address is removed from the routing table, but the LED is still blinking on the interface.

same for 

ip link set eth3 off

how can I switch the interface off (so simulate a cable cut ?) without really disconnecting the cable ?

[Deep Patel]

Dear Chetan,

I remember there is an option In the command ethtool.

Check for the man page of ethtool

Warm regards,

Deep Patel

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[Tejas Barot]

Hello,

Don't know this will work for you or not.

But you can go ahead with Mr. Deep Suggested.

Try by turning off Auto negotiation and your Link Detection value will change.

#ethtool -s ethX autoneg off
#ethtool ethX

Never tried but give it try and update us.

To Moderators and others, I am sorry for my lots of Top posting as I am replying from Blackberry Device and its not providing facility to modify/change Original e-mail. Sorry again.

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From: Chetan Khatri <smarty...@gmail.com>

Sender: vg...@googlegroups.com

Date: Fri, 26 Apr 2013 07:06:14 -0700 (PDT)

To: <vg...@googlegroups.com>

ReplyTo: vg...@googlegroups.com

Subject: [VGLUG] how can i shutdown the PHYSICAL interface of an ethernet interface

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[nehal dattani]

Hi chetan,

On Fri, Apr 26, 2013 at 7:36 PM, Chetan Khatri <smarty...@gmail.com> wrote:

I would like to shutdown the physical interface of an ethernet interface, without disconnecting the cable that is connected to this interface.

Basically, I would like to shutdown the LED of the ethernet interface.

I am not sure why do you want to do this but simply unload the driver and all the NICS managed by that driver will be instant dead.

If you want to make it permanent for particular NIC, set following line in /etc/modprobe.conf

install ethX ( or whatever device name is) /bin/true

 Regards,

Nehal Dattani

[Chetan Khatri]

First of all sorry for late reply as i was out of station few days.

Thanks to all for your replies,

I have already tried ifconfig, ethtool, mii-tool and other third party tools also but none of them is providing me the solution.

Nehal - As i have mentioned that I need to monitor LED (i.e)  the Hard Link of the interface so Unloading driver is not suitable.

Tejas / Deep - In ethtool there is option for Monitor the Soft Link , it does not monitor the LED as per my analyses, Please correct me if m wrong anywhere.

Actually I am developing a NMS Plugin where i need to monitor the Interface Hard Link (LED).

Thanks & Regards,
Chetan Khatri

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[ElectroMech]

Hi,

On Sat, May 11, 2013 at 1:12 AM, Chetan Khatri <smarty...@gmail.com> wrote:

First of all sorry for late reply as i was out of station few days.

Thanks to all for your replies,

I have already tried ifconfig, ethtool, mii-tool and other third party tools also but none of them is providing me the solution.

Nehal - As i have mentioned that I need to monitor LED (i.e)  the Hard Link of the interface so Unloading driver is not suitable.

Tejas / Deep - In ethtool there is option for Monitor the Soft Link , it does not monitor the LED as per my analyses, Please correct me if m wrong anywhere.

There are very less chances it will work. Just logically , even if you boot from BIOS do not allow to load os still LED's are blinking. 

There are two LED's, one is for connectivity and other is for data.

 

Actually I am developing a NMS Plugin where i need to monitor the Interface Hard Link (LED).

You need to develop a patch to control LED, if controls are given in Network cards.

And in few cards only the patch is available to controls LED, not all.

This is my observation. 

Might help you.

Thanks & Regards,
Chetan Khatri

Thanks and Regards. 

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