How to make two vlans on one interface working with dhclient

[Julian Elischer]

Brooks Davis wrote:
> On Wed, Aug 20, 2008 at 03:13:00PM +0200, Popof Popof wrote:
>> Hi,
>> I have a FreeBSD 6.0 box andi need to configure it in a way that I must use
>> 2 vlans under one interface and both of them will get an address thanks to
>> dhclient.
>>
>> So in order to make this job I created vlans:
>>
>>  ifconfig rl0.100 create
>> ifconfig rl0.2101 create
>> The vlans are created without any problem.
>> But I also want to retrieve an diffrent ip address from a dhcpd server on
>> the two of them.
>> I've made a specific dhclient.conf for each one:
>>
>> interface "rl0.100" {
>> #My options
>> }
>> interface "rl0.2101" {
>> #My options
>> }
> 
> Unless it's absolutly necessicary I don't recommend using dhclient.conf.  I
> don't test it.
> 
>> When I launch dhclient on only one interface (100 or 2101) it's works fine
>> and I get an ip address (class B on vlan 100 and class A on vlan 2101).
>> But if I launch dhclient on the second interface it's make an error:
>>
>> dhclient: Can't bind to dhcp address: Address already in use. Please make
>> sure there is no other dhcp server runing and that there's no entry for dhcp
>> or bootp in /etc/inetd.conf
>>
>> Does someone had an idea about how to fix this problem and having my two
>> vlans working with dhclient?
> 
> The current dhclinet scripts don't really support this case.  In theory if you
> removed support for default routes and resolv.conf setting it should probably
> work, but it's certainly not something I'd expect to work.

use vimage :-)

> 
> -- Brooks