Исходное сообщение
"DHCP на VLAN интерфейсе" Отправлено anonymous, 21-Май-12 19:07
Короче говоря, процитирую: * FLAGS:  1 REORDER_HDR  When this is set, the VLAN device will move the             ethernet header around to make it look exactly like a real             ethernet device.  This may help programs such as DHCPd which             read the raw ethernet packet and make assumptions about the             location of bytes.  If you don't need it, don't turn it on, because             there will be at least a small performance degradation.  Default             is OFF. Вот и проблема была. Жаль, что на это ушло СТОЛЬКО времени.