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MPLS Considered Helpful

MPLS Considered Helpful

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MPLS Considered Helpful

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  1. MPLS Considered Helpful Bruce Daviebsd@cisco.com

  2. I’m not bitter

  3. MPLS • Widely believed to stand for “Multiprotocol Label Switching” • Would it have been more popular if “IP switching” were not already taken? • But in reality MPLS is short for “Minneapolis”

  4. The Midwestern Grassy Knoll • As MPLS becomes more and more dominant in the IETF, the IETF keeps circling back to Minneapolis • Coincidence or conspiracy? You be the judge.

  5. MPLS Books Published (p.a.) MPLS Working Groups MPLS Internet Drafts  12 Sigcomm Papers 6 MPLS Trends 1996 1997 1998 1998 1999 2000 2001 2002 2003

  6. MPLS Books Published (p.a.) MPLS Working Groups MPLS Internet Drafts  12 0 Sigcomm Papers 6 MPLS Trends 1996 1997 1998 1998 1999 2000 2001 2002 2003

  7. MPLS Benefits #1 & 2 • An intellectual honeypot for demonstrably inferior research • Simplication of Sigcomm Review process • If (title contains “MPLS”) then • strong_reject = true • else • review paper • Research on more advanced algorithms possible

  8. I’m not bitter

  9. The Shenker Experiment • Davie, B., and Shenker, S. The impact of steganography on service differentiation: a game-theoretic approach • Davie, B., and Shenker, S. Solving the major problems in routing, addressing, congestion and scaling using MPLS: a game-theoretic approach

  10. MPLS Benefit 3: TTL hiding • Providers can hide the internal topology from pesky grad students • Moving from ATM to MPLS carries no “increased hop count penalty” • Ongoing research: TTL incrementing for IP

  11. Appplication data (generic viagra advert) Transport Header IP Header (optional) MPLS label = 01100110001101100101 L2 Header MPLS Benefit 4: Spam Protection • Need an IP address to receive spam • I’m rejecting all packets that have an IP header right above the L2 header • Here is my MPLS label – don’t tell the spammers

  12. MPLS-based spam protection • MPLS labels are link-local in scope • If you tell my label to spammers, I can pick another one (new business card needed) • Research • How you ensure the right label is on your packets when they arrive at my link • Virtual business card distribution protocols

  13. I’m not bitter

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