IPv6: removal of the autogenerated link-local address of an interface still possible

IPv6: removal of the autogenerated link-local address of an interface still possible

[Peter Bieringer]

Hi,

used kernel: 2.6.9-1.681_FC3

is this behavior still by design? I'm not happy about this because if the 
link-local address is removed, it can't be added easily anymore.

"howto":

# ip -6 addr show dev eth1
3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qlen 1000
    inet6 fe80::200:cbff:fe23:32bb/64 scope link
       valid_lft forever preferred_lft forever
# ip -6 addr del fe80::200:cbff:fe23:32bb/64 dev eth1
# ip -6 addr show dev eth1
Device "eth1" does not exist.
# ip addr show dev eth1
3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:00:cb:23:32:bb brd ff:ff:ff:ff:ff:ff


Would it be not better to prevent user space tools from removal of the (one 
and only) autogenerated link-local address?

	Peter
-- 
Dr. Peter Bieringer                        http://www.bieringer.de/pb/
GPG/PGP Key 0x958F422D                  mailto: pb at bieringer dot de
Deep Space 6 Co-Founder and Core Member     http://www.deepspace6.net/

Re: (usagi-users 03168) IPv6: removal of the autogenerated link-local address of an interface still possible

[Yuji Sekiya]

At Sat, 25 Dec 2004 20:42:49 +0100,
Peter Bieringer <pb@bieringer.de> wrote:

Hello,

> Would it be not better to prevent user space tools from removal of the (one 
> and only) autogenerated link-local address?

I don't agree. Because some user may want to remove an autogenerated
link-local address and add an link-local address manually.

-- Yuji Sekiya

Re: (usagi-users 03168) IPv6: removal of the autogenerated link-local address of an interface still possible

[David S. Miller]

On Sun, 26 Dec 2004 11:17:01 +0900
Yuji Sekiya <sekiya@wide.ad.jp> wrote:

> At Sat, 25 Dec 2004 20:42:49 +0100,
> Peter Bieringer <pb@bieringer.de> wrote:
> 
> > Would it be not better to prevent user space tools from removal of the (one 
> > and only) autogenerated link-local address?
> 
> I don't agree. Because some user may want to remove an autogenerated
> link-local address and add an link-local address manually.

I completely agree.

Re: IPv6: removal of the autogenerated link-local address of an interface still possible

[YOSHIFUJI Hideaki / 吉藤英明]

Sorry for silence.

In article <20041226002322.2c2914e4.davem@davemloft.net> (at Sun, 26 Dec 2004 00:23:22 -0800), "David S. Miller" <davem@davemloft.net> says:

> > > Would it be not better to prevent user space tools from removal of the (one 
> > > and only) autogenerated link-local address?
> > 
> > I don't agree. Because some user may want to remove an autogenerated
> > link-local address and add an link-local address manually.
> 
> I completely agree.

I agree (to allow users to remove auto-generated link-local address), too.

--yoshfuji

Re: (usagi-users 03172) Re: IPv6: removal of the autogenerated link-local address of an interface still possible

[Peter Bieringer]

--On Sonntag, Dezember 26, 2004 00:23:22 -0800 "David S. Miller" 
<davem@davemloft.net> wrote:

> On Sun, 26 Dec 2004 11:17:01 +0900
> Yuji Sekiya <sekiya@wide.ad.jp> wrote:
>
>> At Sat, 25 Dec 2004 20:42:49 +0100,
>> Peter Bieringer <pb@bieringer.de> wrote:
>>
>> > Would it be not better to prevent user space tools from removal of the
>> > (one  and only) autogenerated link-local address?
>>
>> I don't agree. Because some user may want to remove an autogenerated
>> link-local address and add an link-local address manually.
>
> I completely agree.

Ok. The reason is understandable, therefore I have to look deeper here on 
one of my systems, why suddenly a link-local address was gone.

Thank you very much for clarification.

	Peter
-- 
Dr. Peter Bieringer                        http://www.bieringer.de/pb/
GPG/PGP Key 0x958F422D                  mailto: pb at bieringer dot de
Deep Space 6 Co-Founder and Core Member     http://www.deepspace6.net/