topic Generate Linkdown or Linkup trap using ifconfig in Operating System - HP-UX

Generate Linkdown or Linkup trap using ifconfig

Akshay44 — Tue, 07 Sep 2010 04:15:04 GMT

Hi,
I have tried doing a
ifconfig lan0 down

on a HP-UX system, I was hoping that this would generate a linkdown trap to snmpdm.

But this does not appear to happen.
Does ifconfig lan0 down generate a linkdown trap?

Re: Generate Linkdown or Linkup trap using ifconfig

Torsten. — Tue, 07 Sep 2010 04:34:38 GMT

Connect to the switch and disable the port - this will probably generate what you want to see.

Re: Generate Linkdown or Linkup trap using ifconfig

Duncan Edmonstone — Tue, 07 Sep 2010 05:30:15 GMT

>> Does ifconfig lan0 down generate a linkdown trap?

No. because ifconfig is only for configuring TCP/IP which is further up the stack from the physical link layer...

So as torsten says, diabling the port on the switch may be your best bet...

It's possible that causing the lan card to reset (either using lanadmin or nwmgr on 11.31) might generate a linkdown (but maybe not!)

HTH

Duncan

Re: Generate Linkdown or Linkup trap using ifconfig

Akshay44 — Tue, 07 Sep 2010 06:55:46 GMT

@Torsten
Nice trick, till now I had to manually unplug the cable to do this. Will talk with my network admin and see if I can access the switch.

@Ducan
Thank you for the information. Looks like it is going to be a long walk to the device, every time I want to test the linkdown trap.

I have tried reseting the lan card with nwmgr, no linkdown.

I was using lanscan and ifconfig, nwmgr is going to be added to by bag of tricks, thank you!