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LISP Generic Protocol Extension (LISP-GPE)

LISP Generic Protocol Extension (LISP-GPE). d raft-lewis-lisp- gpe-02 P. Quinn , D. Lewis, L. Kreeger , F. Maino , M . Smith, N. Yadav , Cisco P. Agarwal , Broadcom IETF 9 0, Toronto, Kanada. Introduction.

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LISP Generic Protocol Extension (LISP-GPE)

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  1. LISP Generic Protocol Extension (LISP-GPE) draft-lewis-lisp-gpe-02 P. Quinn, D. Lewis, L. Kreeger, F. Maino, M. Smith, N. Yadav, Cisco P. Agarwal, Broadcom IETF 90, Toronto, Kanada

  2. Introduction • LISP GPE is a proposal to modify the LISP header to carry payloads other than IPv4/IPv6 EID payloads. • One critical motivation is to create and maintain forwarding plane compatibility with VXLAN-GPE (draft-quinn-vxlan-gpe)

  3. New in -02 • Added OAM Bit (O Bit) • Added Versioning Bits (for explicit header version control) • Shortened Protocol Type to 8 bits: Now, lower 8bits in first word of LISP header define protocol type • 8 bits recovered for future use • Continues to align encap with draft-quinn-vxlan-gpe

  4. LISP-GPE -02 Header • Define lower 8bits in first word of LISP header as protocol type • Add OAM and Header-Version bits 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |N|L|E|V|I|P|R|O|Ver| Reserved | Next Protocol | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Instance ID/Locator-Status-Bits | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 4: LISP-gpe Version bits (P=1)

  5. Future Work • The P bit comes at the expense of two features: Nonce, Map Versioning and Echo-Nonceing • The Authors agreed to add explicit text discussing the reasoning's behind this choice

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