CentOS - Aug 2011 - CentOS 6 and IPv6 neighbor proxy

To route a subnet in ipv6 there are two possibilities:
-          add route commands for the subnet in each computer
-          or use neighbor proxy in the router server
I prefer neighbor proxy.
 
So I have to activate neighbor proxy in the router:
sysctl -w net.ipv6.conf.all.proxy_ndp=1
 
and I have to add entries for each client in the subnet like 
ip -6 neigh add proxy 2001:0:0:1:211:d8ff:fe97:3273 dev eth0
 
This works well but is lost on reboot.
 
For the sysctl command there is /etc/sysctl.conf for permanent configuration.
 
If I create a file route-eth0 in the directory /etc/sysconfig/network-scripts/
with the above ip neighbor command, the interface eth0 is immediately down.
 
Restart of network brings:
Bringing up interface eth0:  Error: Unknown connection:
5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03.
                                                           [FAILED]
All Interfaces are NetworkManager controlled.
 
Ask for help: 
-          where can I store the command for a permanent configuration? 
-          Shall I not further use NetworkManager?
 
Thank you for help in advance
 
Helmut
 
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On 08/18/2011 11:10 AM, Helmut Drodofsky wrote:
>
> To route a subnet in ipv6 there are two possibilities:
>
> -add route commands for the subnet in each computer
>
> -or use neighbor proxy in the router server
>
> I prefer neighbor proxy.
>
> So I have to activate neighbor proxy in the router:
>
> sysctl -w net.ipv6.conf.all.proxy_ndp=1
>
> and I have to add entries for each client in the subnet like
>
> ip -6 neigh add proxy 2001:0:0:1:211:d8ff:fe97:3273 dev eth0
>
> This works well but is lost on reboot.
>
> For the sysctl command there is /etc/sysctl.conf for permanent
configuration.
>
> If I create a file route-eth0 in the directory
/etc/sysconfig/network-scripts/ with the above ip neighbor command, the
interface eth0 is immediately down.
>
> Restart of network brings:
>
> Bringing up interface eth0:  Error: Unknown connection:
5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03.
>
>                                                            [FAILED]
>
> All Interfaces are NetworkManager controlled.
>
> Ask for help:
>
> -where can I store the command for a permanent configuration?
>
> -Shall I not further use NetworkManager?
>
> Thank you for help in advance
>
> Helmut
>
>
I would never use NetworkManager on a server.  It has never caused me anything
but problems.

My $.02


-- 
Stephen Clark
*NetWolves*
Sr. Software Engineer III
Phone: 813-579-3200
Fax: 813-882-0209
Email: steve.clark at netwolves.com
http://www.netwolves.com
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