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RE: Ethernet over WANs


I think you will see 3 different approaches in the marketplace for
delivering 10GbE over the WAN:

1. 10GbE over SONET where a proprietary OAM is done at SONET layer
2. 10Gbe over wavelengths where a proprietary OAM is done out of band in the
optical channel
3. Native 10Gbe which would require some sort of new OAM protocol

The question that has been asked as since no common standard has been
developed for OAM in SONET, is a "standard" OAM required for native 10GbE?

> Hi all,
> I recently subscribed to this list and was going through the archives
> Some people have mentioned about sending ethernet over MAN/WAN links.
> The question I have is Ethernet doesn't have OAM features of SONET.
> That is a critical feature for WANs (and not LANs)
> How is that handled for 10GbE? Can you make intellegent enough DWDM
> elements to handle that. Doesn't that by itself add overhead which is
> comparable to SONET overhead. If so, then why is there so much
> discussion
> as to replace SONET by 10GbE.

> In packet over SONET, we use PPP which adds very little
> overhead. Can't we use the same format for 10GbE over SONET. In that
> case we can define the 10GbE standard without worrying about SONET .
> Just my 2c.
> Thanks
> Rohit Mittal
> ~