> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Pseudowire And LDP-enabled Services WG of the IETF.
> Title : Use of Ethernet Control Word RECOMMENDED
> Authors : Stewart Bryant
> Andrew G Malis
> Ignas Bagdonas
> Filename : draft-ietf-pals-ethernet-cw-01.txt
> Pages : 9
> Date : 2018-02-27
> The pseudowire (PW) encapsulation of Ethernet, as defined in RFC4448,
> specifies that the use of the control word (CW) is optional. In the
> absence of the CW an Ethernet pseudowire packet can be misidentified
> as an IP packet by a label switching router (LSR). This in turn may
> lead to the selection of the wrong equal-cost-multi-path (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 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 pseudowire control word in all but
> exceptional circumstances.
> This document updates RFC4448.
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-pals-ethernet-cw/ >
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-pals-ethernet-cw-01 > https://datatracker.ietf.org/doc/html/draft-ietf-pals-ethernet-cw-01 >
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-pals-ethernet-cw-01 >
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
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