How to remove a dummy interface on the fly

[Barry Brimer]

On Mon, 8 Sep 2008, Stephen Parfitt wrote:

> Hi,
>
> Thanks Sark, trouble is though, there is no script, I create the dummy interface manually with ifconfig. I thought a /etc/init.d/network restart would remove the dummy0 interface too but its still there.
>
> There is no ifconfig delete that relates to removing an interface.
>
> Has anyone managed to remove a dummy interface?

Have you tried "ifconfig dummy0 0.0.0.0"?

> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com] On Behalf Of Sakthivel
> Sent: 07 September 2008 08:02
> To: General Red Hat Linux discussion list
> Subject: Re: How to remove a dummy interface on the fly
>
> hi,
>
>      Remove the /etc/sysconfig/network-scripts/ifcfg-dummy0 file and restart the network service and check.
>
> Reagrds,
> Sark.
>
> --- On Fri, 9/5/08, Stephen Parfitt <sparfitt at avaya.com> wrote:
> From: Stephen Parfitt <sparfitt at avaya.com>
> Subject: How to remove a dummy interface on the fly
> To: redhat-list at redhat.com
> Date: Friday, September 5, 2008, 12:55 PM
>
> Hi,
>
> When working with LVS I need to add dummy0 interfaces to the real servers like this:
>
> #ifconfig dummy0 192.168.10.7 netmask 255.255.255.0
>
> This then shows up and works nicely:
>
> [root at gbcdff1274m ~]# ifconfig -a
> dummy0    Link encap:Ethernet  HWaddr DA:37:9F:77:D0:99
>          inet
> addr:192.168.10.7  Bcast:192.168.10.255 Mask:255.255.255.0
>          inet6 addr: fe80::d837:9fff:fe77:d099/64 Scope:Link
>          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0
>          RX bytes:0 (0.0 b)  TX bytes:210 (210.0 b)
>
>
> The problem is, the servers are shared and after testing I need to hand them back, the only way I know to remove the dummy0 interface is to reboot the machine, is there a nice way I can remove it from the command line without a reboot?
>
> I've tried:
>
> ifconfig dummy0 down, this disables it but it remains in the list.
> /etc/init.d/network restart and it still remains
>
> Any help much appreciated.
>
>
> Steve P
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