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IETF RFC 8469
[ACTIVE]

Recommendation to Use the Ethernet Control Word

Metadata

Publisher
IETF
Doc Type
Standard
Pages
9
Abstract
The pseudowire (PW) encapsulation of Ethernet, as defined in RFC 4448, specifies that the use of the control word (CW) is optional. In the absence of the CW, an Ethernet PW packet can be misidentified as an IP packet by a label switching router (LSR). This may lead to the selection of the wrong equal-cost multipath (ECMP) path for the packet, leading in turn to the misordering of packets. This problem has become more serious due to the deployment of equipment with Ethernet Media Access Control (MAC) addresses that start with 0x4 or 0x6. The use of the Ethernet PW CW addresses this problem. This document RECOMMENDS the use of the Ethernet PW CW in all but exceptional circumstances. This document updates RFC 4448.
Publication Date
2018-11-01
Status Note
Proposed Standard
DOI
10.17487/RFC8469
Link
https://doi.org/10.17487/RFC8469
Author(s)
Stewart Bryant
Andrew G. Malis
Ignas Bagdonas
Keyword(s)
Pseudowire, Control Word, ECMP, MAC Address
Latest version of IETF RFC 8469

Document Versions — IETF RFC 8469

  • ▶ IETF RFC 8469 (2018-11-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

Bibliographic Reference(s)

  • RFC2992 — RFC2992 EXTERNAL
  • IETF RFC 3209 [Active*]
  • RFC5085 — RFC5085 EXTERNAL
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IETF RFC 8469, Recommendation to Use the Ethernet Control Word. Available at https://doi.org/10.17487/RFC8469
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IETF RFC 8469, Recommendation to Use the Ethernet Control Word. Available at https://doi.org/10.17487/RFC8469

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IETF RFC 8469, Recommendation to Use the Ethernet Control Word. Available at https://doi.org/10.17487/RFC8469
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<span class="citation"><cite>IETF RFC 8469</cite>, Recommendation to Use the Ethernet Control Word. Available at <a href="https://doi.org/10.17487/RFC8469" target="_blank" rel="noopener">https://doi.org/10.17487/RFC8469</a></span>

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IETF RFC 8469, Recommendation to Use the Ethernet Control Word
doi: 10.17487/RFC8469
url: https://doi.org/10.17487/RFC8469
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<li>
<cite id="bib-rfc8469">IETF RFC 8469</cite>, Recommendation to Use the Ethernet Control Word
<span class="doi">10.17487/RFC8469</span>
</li>