Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-RT-Original-Encoding: utf-8
Content-Length: 743


Description of problem:
If dhcpd is listening on a plain interface "eth0" it also sees the 
traffic from VLANs "eth0.7" but generates responses without VLAN tags.

Steps to Reproduce:
1. dhcp server with ethX and ethX.Y
2. dhcpd -d ethX
3. from a client generate dhcp request on vlan Y

Actual results:
dhcpd generates DHCPOFFER on non-vlan

Expected results:
dhcpd ignores the request.

Additional info:
dhcpd needs to ignore the tagged requests on plain interfaces.

If it is listening on all interfaces (including ethX.Y) it will see the 
tagged version on eth0 and also as an untagged version on ethX.Y, thus 
generating duplicates (even if the response was correctly tagged).


All credits go to Martin Poole from Red Hat, inc.

--
Jiri