Gigabit Ethernet Products Designed for Seamless Upgrades
speed connectivity is a reality with 40/100 Ethernet server
network interface cards, switch uplinks and switches now
available. The expected June 2010 ratification of the 802.3ba
standard is not holding back products from entering the
market today with pre-standard products being released.
Xmultiple has released products which are available so just
call us for samples.
IEEE started work on the 802.3ba standard in late 2006 and
defined two different applications with 40G for server connectivity
and 100G for core switching.
revenue for 10G Ethernet switches doubled in 2008 and there
is a demand for 40G and 100G Ethernet with many companies
needed this capacity. 10G Ethernet is now becoming a major
part of the access layer of larger networks and is being
the first choice for the client side. With the users now
using 10G for ther needs this creates the need for 40/100
in the distribution layer and the network core. The 802.3ba
is intended to maintain full compatibility with the installed
base of Ethernet nodes and uses the optical fiber backplanes
and copper cabling which perserves the exising network architecture.
802.3ba standare is not expected to be ratified until June
2010 however initial interoperability testing is happen
now and companies with the need for these speed will not
wait for the standard and are moving with their development
of products. The reasons for the driving demand for 40/100G
Ethernet are the same factors currently pushing 10G which
is data center virtualizaiton and storage and high-definition
video conferencing and medical imaging.
like AT&T and Verizon are providing 10G Ethernet LAN
and Etherrnet Virual Private Line services to custoemr in
100 U.S. metro markets. At 10G and 40/100G Ethernet users
have to be aware of the need to ensure precise clocking
synchronization between systems and especially between equipment
from different vendors. If precise clocking is not achieved
this will increase latency and packet loss. This latency
issue is a bigger issue than many companies realize and
at these speeds the specifications premit only a little
variance for clocks. Therefore at 10G, just the smallest
difference in the clocks between ports can cause high latency
and packet loss issues. At 40G it is even a large issue
with the precise clocking requirements. Cabling infrastructure
for 40/100G must be the appropriate grade and length of
fiber for seamless and smooth networking operation. The
physical interfaces (PHY) for 40G Ethernet include a range
to cover distances inside th edata center up to 100 meters
to connect the wide range of different server form factors.
They will require a parallel fiber capabiltiy. The 100G
Ethernet rate includes distances and media appropriate for
connections for intr-office and inter-office applications.
The PHY for 40G Ethernet are 1 meter backplane, 10 meter
copper and 100 meter multimode fiber and 100G is 10 kilometer
and 40 kilometer single-mode fiber. http://www.ieee802.org/3/ba/