When MPLS frames are sent over ATM, label is inserted over VPI/VCI in
ATM cell header. In other L2 protocols (PPP, FR, 802.3) labels are
always put after L2 header, so it (L2 header) remains unchanged.
Problem is that we don't own ATM infrastructure, but we buy it from
Telecom, and we only get one VPI/VCI pair. So cells with changed
header cannot pass. Are there any solutions for this case (PPP over ATM,
GRE tunnel for MPLS, ...).
If somebody has similar situation, please comment on this.
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