[nsp] Réf. : cisco-nsp Digest, Vol 13, Issue 54

[sthaug at nethelp.no]

> I don't think that the Control Word is used for Ethernet encapsulation.
> draft-ietf-pwe3-ethernet-encap states that CW is optional for Ethernet
> encapsulation and implementations must support sending no CW.
> 
> Did someone check if the CW is used between Cisco gear for EoMPLS ?

Yes, we have verified this (sniffing via a hub and hald duplex Ethernet
ports). The control word is present, but is always zero, as far as we
can see.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no