OT:Transparent Bridging Details

Dear Experts,

I would appreciate your support on the following question.

When doing transparent bridging especially between different media (for
instance ethernet/serial) as in the following link:

http://www.cisco.com/en/US/tech/tk331/tk660/technologies_tech_note09186a0080094471.shtml

When the router receives the ethernet frame, and wants to send it out as
with an HDLC/PPP..etc encapsulation, is the ethernet encapsulation (header
information) completely torn and only PPP/HDLC..etc encapsulation out or is
it still there as if you are putting the outer envelope of whatever
encapsulation you are using in the serial interface and inside it you will
still have the ethernet encapsulation?

Thank You

-- 
KJ
Blogs and organic groups at http://www.ccie.net