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LISP Generic Protocol Extension (LISP- GPE). d raft- lewis -lisp- gpe P. Quinn , D. Lewis, L. Kreeger , F. Maino , CISCO M . Smith, N. Yadav , INSIEME NETWORKS IETF 88, Vancouver, BC, Canada. Why LISP- GPE.

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LISP Generic Protocol Extension (LISP- GPE)

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Lisp generic protocol extension lisp gpe

LISP Generic Protocol Extension (LISP-GPE)

draft-lewis-lisp-gpe

P. Quinn, D. Lewis, L. Kreeger, F. Maino, CISCO

M. Smith, N. Yadav, INSIEME NETWORKS

IETF 88, Vancouver, BC, Canada


Why lisp gpe

Why LISP-GPE

  • RFC6830 relies on the inspection of the first byte of the inner header to indicate the inner header’s IP version

  • Use cases for both DC host mobility and L2 VPNs require encapsulation of Ethernet

  • Desire of the authors to promote experimentation with LISP in these use cases


Lisp gpe

LISP-GPE

  • Define lower 16 bits in first word of LISPheader as protocol type

  • Define Protocol bit (P bit)

    • P=0: payload MUST conform to RFC6830 as currently defined (i.e. IP[4,6])

    • P=1: Indicates presence of protocol type field

  • When P bit is set, N, E and V bits must be Zero

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|N|L|E|V|I|P|R|R| Reserved |Nonce/Map Version/Protocol Type|

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Instance ID / Locator-Status-Bits |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


Trade offs

Trade Offs

  • The P bit comes at the expense of two features: Nonce, Map Versioning and Echo-Nonceing


Summary

Summary

  • Enables operators/experimenters to use LISP for all protocols

  • Compatible with draft-quinn-vxlan-gpesee presentation at NVO3WG

  • Working with authors of draft-yong-l3vpn-nvgre-vxlan-encap to align on common format


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