Cannot re-enable 'auto' for IPv6 link local?

Cannot re-enable 'auto' for IPv6 link local?

[Ben Greear]

At one time, I'm fairly certain this worked, but not having much
luck in a hacked 3.9.11+ kernel:

The goal is to enable the link-local address to be auto-configured.
At start of this, there is no /proc/sys/net/ipv6/config/eth30 dir
because all IPv6 addrs were removed (I suppose).

# ./local/sbin/ip -6 addr add 2345::18 dev eth30
# echo 1 > /proc/sys/net/ipv6/conf/eth30/autoconf
# cat /proc/sys/net/ipv6/conf/eth30/autoconf
1
# ./local/sbin/ip -6 addr del 2345::18 dev eth30
# cat /proc/sys/net/ipv6/conf/eth30/autoconf
cat: /proc/sys/net/ipv6/conf/eth30/autoconf: No such file or directory


What is the proper way to turn on ipv6 auto configuration?

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

Re: Cannot re-enable 'auto' for IPv6 link local?

[Hannes Frederic Sowa]

On Tue, Sep 24, 2013 at 03:54:18PM -0700, Ben Greear wrote:
> At one time, I'm fairly certain this worked, but not having much
> luck in a hacked 3.9.11+ kernel:
> 
> The goal is to enable the link-local address to be auto-configured.
> At start of this, there is no /proc/sys/net/ipv6/config/eth30 dir
> because all IPv6 addrs were removed (I suppose).
> 
> # ./local/sbin/ip -6 addr add 2345::18 dev eth30
> # echo 1 > /proc/sys/net/ipv6/conf/eth30/autoconf
> # cat /proc/sys/net/ipv6/conf/eth30/autoconf
> 1
> # ./local/sbin/ip -6 addr del 2345::18 dev eth30
> # cat /proc/sys/net/ipv6/conf/eth30/autoconf
> cat: /proc/sys/net/ipv6/conf/eth30/autoconf: No such file or directory
> 
> 
> What is the proper way to turn on ipv6 auto configuration?

This issue is fixed by commit 876fd05ddbae03166e7037fca957b55bb3be6594 ("ipv6:
don't disable interface if last ipv6 address is removed").

Greetings,

  Hannes

Re: Cannot re-enable 'auto' for IPv6 link local?

[Ben Greear]

On 09/24/2013 03:57 PM, Hannes Frederic Sowa wrote:
> On Tue, Sep 24, 2013 at 03:54:18PM -0700, Ben Greear wrote:
>> At one time, I'm fairly certain this worked, but not having much
>> luck in a hacked 3.9.11+ kernel:
>>
>> The goal is to enable the link-local address to be auto-configured.
>> At start of this, there is no /proc/sys/net/ipv6/config/eth30 dir
>> because all IPv6 addrs were removed (I suppose).
>>
>> # ./local/sbin/ip -6 addr add 2345::18 dev eth30
>> # echo 1 > /proc/sys/net/ipv6/conf/eth30/autoconf
>> # cat /proc/sys/net/ipv6/conf/eth30/autoconf
>> 1
>> # ./local/sbin/ip -6 addr del 2345::18 dev eth30
>> # cat /proc/sys/net/ipv6/conf/eth30/autoconf
>> cat: /proc/sys/net/ipv6/conf/eth30/autoconf: No such file or directory
>>
>>
>> What is the proper way to turn on ipv6 auto configuration?
>
> This issue is fixed by commit 876fd05ddbae03166e7037fca957b55bb3be6594 ("ipv6:
> don't disable interface if last ipv6 address is removed").
>
> Greetings,
>
>    Hannes
>


Thanks!

I'll add that to my 3.9 kernel.

A secondary problem in my case is that the NIC and/or fibre cable
has issues and it had just lost link and I did not notice
right away...

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com