Routing stops working when we create a new vlan

[Marcelo Gondim]

On 07-08-2015 11:33, Andrey V. Elsukov wrote:
> On 07.08.2015 17:29, Marcelo Gondim wrote:
>> On 07-08-2015 10:16, Andrey V. Elsukov wrote:
>>> On 07.08.2015 01:57, Marcelo Gondim wrote:
>>>> For all work again I need to restart the router.
>>>> I don't know if I could correctly explain the problem.
>>> Do you have gateway_enable="YES" in your /etc/rc.conf?
>>>
>> I have net.inet.ip.forwarding=1 but when I create a new vlan, the system
>> is changing to: net.inet.ip.forwarding=0. Why?
> AFAIR, devd starts some scripts and if you don't have
> gateway_enable="YES" net.inet.ip.forwarding will be reset to zero. And
> since devd doesn't restart sysctl.conf you lose your gateway.
>
> The right way to configure router - use gateway_enable="YES" in rc.conf.
>
>> I try to go back to the value 1 and the system does not return to work.
>> Only back to work if I restart the system.
> This seems strange, are you sure?
>
Problem solved using gateway_enable = "YES" in /etc/rc.conf.
But I still think it does wrong. Why to create a vlan I need to have 
this parameter configured in rc.conf? Or why it needs to change 
net.inet.ip.forwarding?

[]'s
Gondim