How to remove a dummy interface on the fly

[Stephen Parfitt]

Hi,

Not tired that, have done now but its still listed:



[root at gbcdff0796l AvayaBase]# ifconfig -a
dummy0    Link encap:Ethernet  HWaddr 7E:D8:B1:06:E1:29  
          BROADCAST NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:85 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:9459 (9.2 KiB)

eth0      Link encap:Ethernet  HWaddr 00:C0:F0:7A:F6:DF  
          inet addr:192.168.35.81  Bcast:192.168.35.255  Mask:255.255.255.0
          inet6 addr: fe80::2c0:f0ff:fe7a:f6df/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2014102 errors:0 dropped:0 overruns:0 frame:0
          TX packets:622313 errors:18 dropped:0 overruns:2 carrier:18
          collisions:0 txqueuelen:1000 
          RX bytes:661724710 (631.0 MiB)  TX bytes:105258270 (100.3 MiB)
          Interrupt:5 Base address:0x8000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:509640 errors:0 dropped:0 overruns:0 frame:0
          TX packets:509640 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:398248976 (379.7 MiB)  TX bytes:398248976 (379.7 MiB)

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
 


How do I get rid of the thing!?




-----Original Message-----
From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com] On Behalf Of Barry Brimer
Sent: 08 September 2008 13:49
To: General Red Hat Linux discussion list
Subject: RE: How to remove a dummy interface on the fly



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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