Re: 10GE data rate?
- To: Bill.St.Arnaud@xxxxxxxxxx, HSSG <stds-802-3-hssg@xxxxxxxx>
- Subject: Re: 10GE data rate?
- From: Rich Taborek <rtaborek@xxxxxxxxxxxxxxxx>
- Date: Thu, 24 Jun 1999 10:14:23 -0700
- References: <NBBBJIMEPHPGCNGAHPMFGENMEOAA.Bill.St.Arnaud@xxxxxxxxxx>
- Sender: owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx
I'm wondering whether you can provide a brief summaryover this reflector of the
requirements of the functions other than data transport which would be placed
upon a Native 10 GbE transport for the WAN (both 3a and 3b). This would include
any cable plant management, link device management, multi-link/path (redundacny)
This information would be extremely valuable to the IEEE 802 management and
protocol experts who would be able to determine applicable standard facilities
and mechanisms to address these requirements, and, if not available, may come up
with new mechanisms to address these requirements.
"Bill St. Arnaud" wrote:
> Excellent summary. Under category 3 I would add 2 sub-categories:
> 3a. Native 10GbE for the WAN that uses CWDM or DWDM directly and therefore
> must have a modicum of signalling protocols "in-band"
> 3b. Transparent 10GbE for the WAN, where the signalling is done in the
> optical domain or out of band
> > -----Original Message-----
> > From: owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx
> > [mailto:owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx]On Behalf Of Rich
> > Taborek
> > Sent: June 23, 1999 4:18 AM
> > To: nuss@xxxxxxxxxx; HSSG; HSSG Speed
> > Subject: Re: 10GE data rate?
> > In an early note to the HSSG Speed reflector, I summarized my view of all
> > schemes discussed thus far to support the WAN at Ethernet rates
> > of ~10 Gbps.
> > I'll repost that summary here to make it available to the larger HSSG
> > reflector. The three schemes I have come up with are:
> > 1) Legacy: 10Gbps Ethernet switched/bridged/routed to Sonet. We
> > simply need
> > to specify a 10 Gbps PHY to make this fly.
> > 2) SONET-based PHY: A new Ethernet PHY compatible with OC-192 SONET that
> > connects directly to the Ethernet MAC, which runs at SONET OC-192 rates.
> > This is the new PHY suggested by Paul. Looking forward, the next higher
> > Ethernet speed variant would likely be OC-768.
> > 3) 10 Gbps Ethernet WAN PHY: A new Ethernet PHY supporting WAN dark fiber
> > and/or DWDM equipment, sans SONET. I believe that this is one of
> > the options
> > proposed by Bill St. Arnaud among others.
> > My scheme (3) seems to correspond with Martin's (1) and (3) below and is a
> > PHY variant which supports a data rate of exactly 10.0 Gbps.
> > Other qualities
> > of this PHY may include any or all of the following:
> > a) Direct drive of long-haul dark fiber and/or DWDM equipment;
> > b) Simplex and/or duplex channels;
> > c) Standard Ethernet facilities for out-of-band signaling and cable plant
> > management including MAC Control frames, Auto-Negotiation, and (I hate to
> > even suggest it) Primitive Signaling using alternate "Idle"
> > codes. Ethernet
> > out-of-band signaling capabilities are actually more extensive than most
> > protocols I'm aware of.
> > (1) above seems supports the existing SONET infrastructure quite
> > adequeately
> > and allows high performance switch/bridge/router products to be implemeted
> > in a manner of highest compatibility with the LAN and WAN.
> > (2) sabove ignificantly affects the existing LAN market through
> > its dictate
> > of SONET speeds and other peculiarities not applicable to
> > existing LANs and
> > is a step in the wrong direction .
> > (3) above takes Ethernet where no Ethernet has gone before and treads
> > directly on the existing WAN infrastructure. This latter
> > alternative will be
> > difficult to go forward with also since the "LAN" folks consider it to be
> > outside the scope of 802, and the "WAN" folks view it as a significant
> > territorial encroachment. However, once (1) happens, the cost
> > advantages of
> > it will inevitably drive implementations and products based on (3).
> > --
> > Martin Nuss wrote:
> > > Roy:
> > > I wanted to get your expert opinion on a few issues that would be of
> > > interest to me as we go forward in the standard:
> > >
> > > 1) do you really believe that we need to support all the WAN OAMP
> > > features in 10GE? I would rather prefer a light-weight 10ge protocol
> > > that guarantees the lowest cost in the LAN, but make sure that it can be
> > > wrapped easily into a WAN envelope to support all the WAN features.
> > >
> > > 2) at the last meeting, Paul Bottorff as well as Mike Salzman presented
> > > approaches to a serial 10GE standard based on scrambling as opposed to
> > > block coding. Both of these could be used for a low-cost serial LAN
> > > standard, and wrapped into WAN envelopes like SONET to provide WAN OAMP
> > > features. The 10GE data rate would have to be kept to around 9.6 Gb/s
> > > to make that possible at the lowest cost. Presumably, that would
> > > accelerate the acceptance of 10GE in the WAN.
> > >
> > > 3) Alternatively, we could propose to allow for additional control
> > > fields in the 10GE standard that duplicate the functions most important
> > > for WAN apps. This may be the cleanest solution, but it will require
> > > 802.3 to venture into an area that it has not worried about before...
> > >
> > > Any thoughts?
> > >
> > > Martin
> > --
> > Best Regards,
> > Rich
> > -------------------------------------------------------------
> > Richard Taborek Sr. Tel: 650 210 8800 x101 or 408 370 9233
> > Principal Architect Fax: 650 940 1898 or 408 374 3645
> > Transcendata, Inc. Email: rtaborek@xxxxxxxxxxxxxxxx
> > 1029 Corporation Way http://www.transcendata.com
> > Palo Alto, CA 94303-4305 Alt email: rtaborek@xxxxxxxxxxxxx
Richard Taborek Sr. Tel: 650 210 8800 x101 or 408 370 9233
Principal Architect Fax: 650 940 1898 or 408 374 3645
Transcendata, Inc. Email: rtaborek@xxxxxxxxxxxxxxxx
1029 Corporation Way http://www.transcendata.com
Palo Alto, CA 94303-4305 Alt email: rtaborek@xxxxxxxxxxxxx