MPLS

required reading:

RFCs

• RFC 3031 - Multiprotocol Label Switching Architecture - Sections 1-3
• RFC 3346 - Applicability Statement for Traffic Engineering with MPLS
• RFC 3270 - MPLS Support of Differentiated Services - Sections 1-2

Other Documents

• Internet Traffic Engineering without Full Mesh Overlaying (do not bother with the math)

optional reading: