The backbone at the time of my original work that I participated in was 40Gits/in and 40Gbits/out unless that has changed 10GigE is not practical or cost effective if it is limited to local area's and provate connections. That doesn't mean from A design perspective that A cost effective solution has already been designed, the position of the market and the cost per megabit for most companies is not there, most companies now do 2.5Gbits bi-diectioonally for 5Gbits and barely use all of that. -Henry Deepak Jain <deepak@ai.net> wrote:
While there are some smitherings about 10GigE, there are technical reasons and market reasons it is not really ready for prime yet, that is not to say it's not going to happen, it is just not going happen now.
Some people are using it in the MAN and WAN now though.
Exactly. At the EQIX/ASH GPF Telia and AOL both said they were using 10GE cross-connects for private peering. So that means at least 3-4 major networks are using them in production in a LAN, MAN or WAN environment. When you are aggregating lots of a GEs, there isn't really a great, cost-effective way to move all of these bits cost-effectively. nxOC48 is pretty cheap, but a little ugly if you need the bandwidth unchoked. 10GE is supposed to get there, but at a 10xGE price, not a OC192 type price. The real advantage of Copper 10G is that eventually you can deploy it to all the existing copper [inside] plants that people have currently deployed. Just like GE, it eventually just becomes tolerant enough to use existing wiring. I would be very happy if the first boxes that came out with these long range xenpaks were muxes that would take 10xGE -> 1x10GE -- this would solve the uplink problem from smaller gear in a heartbeat. Deepak Jain AiNET