[brussels-dev] PSARC/2008/222 Brussels persistence

[Artem Kachitchkine]

>> 	ifconfig <link> plumb
>> 	dladm init-linkprop <link>
>>
>> We propose that this happens automatically each time a link is plumbed.
> 
> How do I, as an admin, plumb an interface with no configuration for
> diagnostic purposes?
> 
> It should also be noted that it is common practice in fora such as IRC
> to tell users to "ifconfig -a plumb" as a somewhat harmless way to
> divine what interfaces they have.  Is this now potentially unsafe?

I think it is neither safer or unsafer. Functionally this is similar to 
today's driver.conf properties: say, you have jumbo frames enabled in 
bge.conf and you want to plumb bge0 without jumbo frames, what do you 
do? Same with setting "mtu" with dladm set-linkprop. Temporarily remove 
unwanted configuration bits and later restore them.

Properties can be both pushed and pulled, and while you could 
theoretically ask userland not to push certain properties into the 
drivers, forbidding drivers to actively retrieve properties when they 
need them might be too tricky.

-Artem