" - A DUID-ban link-layer addressként a kimenő, pppoe-t kezelő ethernet IF mac-jét kell megadni. Hogy miért az kell, azt nem tudom, mert elvileg nem is látszódik a ppp kapcsolaton belül ez, de mindegy."
Ezért azért járna a tudjákmi....
RFC3315
Clients and servers MUST treat DUIDs as opaque values and MUST only
compare DUIDs for equality. Clients and servers MUST NOT in any
other way interpret DUIDs. Clients and servers MUST NOT restrict
DUIDs to the types defined in this document, as additional DUID types
may be defined in the future.The DUID is carried in an option because it may be variable length
and because it is not required in all DHCP messages. The DUID is
designed to be unique across all DHCP clients and servers, and stable
for any specific client or server - that is, the DUID used by a
client or server SHOULD NOT change over time if at all possible; for
example, a device's DUID should not change as a result of a change in
the device's network hardware.